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Renewable energy technologies have the great advantage of using inexhaustible, low-polluting resources with an insignificant contribution to climate change. In addition, their use reduces dependence on conventional resources that will be depleted in the not-too-distant future. Solid biofuels are produced from biomass materials, especially wood, and are new fuels that meet the new requirements of using "clean" and regenerative energy. The paper presents a series of experimental research for obtaining biomass tablets using specially designed equipment, which are a viable solution for the recovery of lignocellulosic waste from vineyards and orchards and beyond. [ABSTRACT FROM AUTHOR]

Global, European and Slovenian energy industries have been facing challenges of transitioning to a carbon-free future. The transition into a sustainable power system will play a key role in maintaining the global warming under the +1.5°C IPCC (Intergovernmental Panel on Climate Change) scenario in the next few years. The paper addresses a combination of the renewable energy and nuclear sources to fill the gap between the growing power consumption and production from the existing and planned conventional sources while abandoning the use of coal in Slovenia. The results, supported by an optimization of the Slovenian power system on an hourly level, show that using an optimal combination of the conventional and new power production technologies, Slovenia can reach the goal of a carbon-free power system by 2037, when a new nuclear unit is planned to be built. Flexible power sources and sinks combined with daily and seasonal electricity storages will be able to provide a balance to the intermittent renewable power generation. To evaluate the feasibility of the proposed development scenario of the Slovenian power system, three key criteria are used: (1) decarbonization of the Slovenian power system, (2) moderate import and export dependence of the Slovenian power system on the hourly level and (3) rate of the Slovenian power system self-sufficiency. [ABSTRACT FROM AUTHOR]

In the present situation, renewable energy has become a vital source to mitigate energy crises and environmental threats. In order to ensure that women's contributions, knowledge and opinions represent a significant portion of the expanding energy sector, it is crucial to approach the development of renewable energy from a gender perspective. Bibliometric analysis was performed to identify prior research on two primary terms, "Gender" and "Renewable Energy", from 1995 to 2022. Identifying the most influential countries, authors, publications, journals, and co-occurrence of keywords helps to understand the evaluation and trends of the research through network visualisations by bibliometric approach. This paper presents a comprehensive bibliometric review of the influence of gender on renewable energy. The result of this paper gives details picture of the gender impact on renewable energy during the period from 1995 to 2022. The paper centred on bibliometric and cluster analysis based on the two most important databases, Web of Science and Scopus. The study involved utilising various bibliometric tools, including R Studio, VOSviewer, and Biblioshiny. The study revealed an increase in publications and citations during the third period since 2017, after the United Nations set the target of the Sustainable Development Goal. Most influential countries and productive authors belong to China, the United States of America, and the United Kingdom. Energy Research and Social Science are predominated in publications on the research topic. In addition, the co-occurrence of keywords found major keywords related to this topic, such as renewable energy, gender, women, knowledge, sustainability, climate change and sustainable development. Finally, the study observed a huge research gap because developing nations are more affected by the lack of gender-influencing policies on the growth of renewable energy. Thus, the study provides a comprehensive overview of research in this field that can help researchers and stakeholders identify potential ways for future research in gender considerations on renewable energy access by formulating effective policies to change society and reach the Sustainable Development Goals. • Gender has become a focal point of interest within the renewable energy sector. • Using network visualisation, bibliometric analysis examines research trends by keyword occurrence and country collaborations. • Publication, citation, journal, and authorship contribution trends are to be analysed. • The research growth across different periods was discussed for potential future studies. [ABSTRACT FROM AUTHOR]

In recent years, as a result of the rapid increase in population and industrial development, the need for energy has increased. Many investments are made especially for electrical energy which is an inevitable requirement for the industry. Most of these investments are made by using fossil resources in countries' lands. Fossil sources are known to be consumable as well as too poisonous gases they give to the atmosphere during energy production. This situation causes global climate change. To prevent climate change, the carbon emitted to the atmosphere has to be brought under a certain control mechanism. In this context, the first Kyoto Protocol and then Paris Climate Agreement was signed. Under these agreements, countries will be responsible for the level of their greenhouse gases in the atmosphere. This situation led to the carbon trade among countries. This situation accelerated the transition of countries from fossil sources to renewable energy sources. In this study, the effect of hydroelectric power plants, one of the renewable energy sources, on carbon emissions was investigated. According to the results, based on fossil sources of 408,533.57 tCO 2 per year from Turkey Gökçekaya dam has been shown to reduce the carbon footprint. • The paper provides a comparison of carbon emissions between hydroelectric and fossil fuel energy sources. • The article examines carbon emission reduction from a perspective of carbon markets and the legal framework. • The study also provides an analysis based on the example of Gökçekaya HEPP in Turkey. • The study provides an economic analysis of the Gökçekaya HEPP with the feasibility analysis. [ABSTRACT FROM AUTHOR]

Abstract The main goal in this paper is to supply a national load by multiple renewable power connections to utility grid at different geographic locations. The national load demand of the country of Jordan is supplied in this case study by finding the optimal configurations and locations (near cities). Cities of higher potential for wind and/or photovoltaic (PV) energy location are selected for connecting to renewable power. The annual system cost of energy (ASCE) for this optimized renewable energy system is shown to be 32.57% less than the conventional grid energy price. Further, the Carbon Dioxide (CO 2) emissions are reduced by 80.13%. These are excellent indications for the feasibility and environmental benefits of retrofitting conventional grid with renewable power in developing countries. Multi-figure of merits (MFOM) based on a Nondominated Sorting Genetic Algorithms (NSGA) optimization cases are investigated which include annual emission indicator (AEI), ASCE, levelized cost of energy (LCOE) and renewable penetration (RP). Results are either two dimensions (2D) or three dimensions (3D) Pareto frontier, where various competitive non-dominant solutions exist. A sweet spot selection (triple-S) procedure is proposed to help select the best point in the two (figure of merits) FOMs Pareto frontier to have both environmental and feasible solutions. Highlights • The contributions of this paper are multi-point connection to a national grid, holistic definition and modeling of the engineering and financial problems, optimal design tool solutions to the multi-point connection problem definition and model, suggesting this as a case study of the concept of "local solutions for a global problem." Such a holistic approach is recommended especially in the developing countries. • The importance of moving toward sustainable energy stems from global climate change and the need to provide access to affordable energy to all of humanity. The ultimate goal is to satisfy a country's national load demand by establishing multiple utility grid connections to various geographic locations of high wind or solar energy resources. This is done by building a new optimization design tool which investigates economic feasibility and environmental impacts. Then, Single figure of merit and multi-figure of merits optimizations have been investigated. • A mathematical modeling is developed for each component, and the optimal configuration is determined for each city. The annual system cost of energy (ASCE) is optimized to be 32.57% less than grid energy price, and the CO 2 emissions (AEI) are reduced by 80.13%. These are excellent indications for the economic feasibility and the environmental benefits of the designed system. The levelized cost of energy (LCOE), total net present cost, renewable penetration (RP) and AEI are 0.058212 $/kWh, $8.713857 billion, 59.49817% and 4.576 Megatonne/year respectively. • A new equation to calculate the salvage cost has been developed in this paper. Moreover, a new procedure in a multi-optimization problem was developed in this paper, which is the Sweet Spot Selection (triple-S) procedure. It is developed to help select the sweet point in the two FOMs Pareto frontier to have both environmental and economic feasible solutions. • Multi-figure of merits (MFOM) optimization cases based on a non-sorting genetic algorithm are investigated such as: AEI vs. ASCE, AEI vs. LCOE, AEI vs. RP and (RP, LCOE, AEI). The MFOM optimization results are either 2D or 3D Pareto frontier, where exists various competitive non-dominant solutions. The sweet spot selection (triple-S) procedure is proposed to help select the sweet spot in the two figure of merits Pareto frontier in order to have both environmental and feasible solutions. [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • This paper presents a detailed review of sustainable water desalination by using solar membrane distillation. • The fundamental of membrane distillation and the different configuration of solar membrane distillation have been discussed. • The recent developments and potential improvement of solar membrane distillation have been discussed in this paper. • The research gaps are highlighted for future improvement. Abstract As the water demand increases continuously, large capacities of desalination plant are added every year to meet freshwater demand. The higher carbon footprint of desalination raises concern on global climate change. The integration of desalination and renewable energy source could mitigate this water-energy nexus. Membrane distillation (MD) is a non-isothermal desalination process in which the low-grade heat is used as the driving force. Many researchers have tried to integrate solar energy and MD for sustainable water desalination. This article presents a comprehensive review of solar MD desalination to understand its current state of development. Solar powered MD systems have been investigated for last few decades. However, its commercialization is very limited due to low flux, high specific energy consumption and large collector area requirement. Further, this review presents the recent developments in MD membrane, innovative MD modules and the importance of optimization, which was able to improve the performance of solar MD. [ABSTRACT FROM AUTHOR]

Abstract African countries are in a unique position to reap the socio-economic and environmental benefits of renewable resources as a means for meeting increasing energy demand in a sustainable way. A critical obstacle for the deployment of renewable energy technologies in Africa is the difficulty of attracting sufficient and affordable finance. This paper compares the impact of financial conditions on the cost of electricity generation across six renewable and three fossil-based technologies in 46 African countries. The results show large cost variations and highlight the extent to which renewables are disadvantaged by current financial practices. The energy-economy-environment model TIAM-ECN is used to show how lowering financing costs results in a much higher deployment of renewables. For example, solar PV could account for 10–15% of total electricity generation by 2050, even without explicit climate policy, thanks to financial de-risking programmes. The results demonstrate that changes in financing schemes could outweigh the impact of technology learning. This paper also demonstrates that, once ambitious climate policies are in place, reducing financing costs for renewables could be an efficient way to lower greenhouse gas emissions. Financial de-risking is thus a key ingredient for unlocking the renewable energy potential in Africa. Highlights • We show how renewables are disadvantaged by today's financial practices in Africa. • We show how lower financing costs result in a higher deployment of renewables. • PV can account for 10–15% of electricity generation by 2050 without climate policy. • Changes in financing schemes could outweigh the impact of technology learning. • Financial de-risking is key for unlocking the renewable energy potential in Africa. [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • Comparing alternative fuels with potential for low-carbon intensities. • Technical process design and economic assessment of hydrogen and CO 2 -based fuels. • Environmental life-cycle assessment considering the full carbon cycle. • Identification of methodological challenges in carbon accounting of CO 2 -fuels. Abstract The deployment of low-emission alternative fuels is crucial to decarbonise the transport sector. A number of alternatives like hydrogen or dimethyl ether/methanol synthesised using CO 2 as feedstock for fuel production (hereafter refer to "CO 2 -based fuels") have been proposed to combat climate change. However, the decarbonisation potential of CO 2 -based fuels is under debate because CO 2 is re-emitted to the atmosphere when the fuel is combusted; and the majority of hydrogen still relies on fossil resources, which makes its prospects of being a low-carbon fuel dependent on its manufacturing process. First, this paper investigates the relative economic and environmental performance of hydrogen (produced from conventional steam methane reforming and produced via electrolysis using renewable energy), and CO 2 -based fuels (dimethyl ether and methanol), considering the full carbon cycle. The results reveal that hydrogen produced from steam methane reforming is the most economical option and that hydrogen produced via electrolysis using renewables has the best environmental profile. Whereas the idea of CO 2 -based fuels has recently gained much interest, it has for the foreseeable future rather limited practical relevance since there is no favourable combination of cost and environmental performance. This will only change in the long run and requires that CO 2 is of non-fossil origin, i.e. from biomass combustion or captured from air. Second, this paper address unresolved methodological issues in the assessment of CO 2 -based fuels, such as the possible allocation of emissions to the different sectors involved. The outcomes indicate that implementing different allocation approaches substantially influences the carbon footprint of CO 2 -based fuels. To avoid allocation issues, expanding the boundaries including the entire system and is therefore recommended. [ABSTRACT FROM AUTHOR]

Abstract Addressing environmental concerns alongside economic development and energy transitions is a challenge for all countries and effective policy making requires approaches that can balance all these concerns. In this paper, combining a range of modeling methodologies is proposed as a way of addressing these questions in an integrated manner. The choice of models to be used would depend on the specific characteristics of the system and region being studied. One possible combination of models is discusses in this paper for the specific case of India. The Integrated Modeling Framework (IMF) proposed combines three modeling approaches – i) index decomposition to estimate impacts of structural changes in the economy, ii) constrained optimization to estimate least cost fuel options for the power sector, iii) input-output analysis to estimate economic impacts. The model results indicate that the mode of investment for climate change mitigation is a significant determinant of the impact on economic growth, incomes, and income distribution in India. In some scenarios, higher investments in green energy negatively affects low income households significantly more as compared to other households. The paper also demonstrates how the IMF can be used to determine the reasons for and therefore alleviate the negative impacts. Highlights • An Integrated Modeling Framework (IMF) combining three modeling methods is presented. • IMF built for India, but applicable for other developing countries also. • IMF useful to study balance between energy, environment, economy, and equity. • Negative trade-off between equity and renewable energy transition in some scenarios. • IMF useful for identifying ways to alleviate the negative trade-off. [ABSTRACT FROM AUTHOR]

This paper argues that past research has overlooked how the way problems and solutions are framed contribute to a prevailing gap in the global governance of climate and energy. Empirically, this paper investigates the frames of energy and climate change as expressed in key documents from the International Panel on Climate Change (IPCC) and International Energy Agency (IEA). Partly in contrast to past research, this paper finds (1) that there is a growing similarity in how the IPCC and IEA frame climate and energy; (2) that the IEA has gone from ignoring to acknowledging climate change and the transformation to a low-carbon energy system; and (3) that there is a prevailing difference in emphasis, whereas the IPCC only marginally discuss energy, while the IEA is still mainly talking about energy needs and fossil fuels even if climate change and renewables have entered their agenda. [ABSTRACT FROM AUTHOR]

Abstract As a result of the increased awareness of the dangers posed by global climate changes (mainly caused by growing global energy consumption needs), the quest for clean and sustainable energy future is becoming of paramount importance. This can be largely realized via a large-scale integration of variable renewable energy sources (RESs) such as wind and solar, which have relatively low carbon footprints. In many power systems, the level of integration of such resources is dramatically increasing. However, their intermittent nature poses significant challenges in the predominantly conventional power systems that currently exist. Among others, frequency and voltage regulation issues can, for example, arise because of improperly balanced and largely uncoordinated RES supply and demand. Generally, the higher the integration level of intermittent power sources is, the higher the flexibility needs are in the system under consideration. Flexibility, in a power systems context, refers to the ability of such a system to effectively cope with unforeseen changes in operational situations, which are mainly induced by the inherent uncertainty and variability arising from the supply side, demand side or any other external factors. In the absence of appropriate flexibility mechanisms, it is increasingly difficult to manage the imbalances between generation and demand as a result of their natural variations in real-time. This paper presents an extensive and critical review of the main existing and emerging flexibility options that can be deployed in power systems to support the integration of "carbon-free" and variable power production technologies. Starting from a broader definition of flexibility, we highlight the growing importance of such flexibility in renewable-rich energy systems, and provide insights into the challenges and opportunities associated with various flexibility options provided by different technologies. Highlights • This paper presents an extensive and critical review of the main existing and emerging flexibility options. • Starting from a broader definition of flexibility, we highlight the growing importance of such flexibility. • Insights into the challenges and opportunities associated with various flexibility options are provided. • Certain barriers that may hinder their developments in the short to medium terms are also provided. [ABSTRACT FROM AUTHOR]

Abstract This paper presents a thorough review of 75 modelling tools currently used for analysing energy and electricity systems. Increased activity within model development in recent years has led to several new models and modelling capabilities, partly motivated by the need to better represent the integration of variable renewables. The purpose of this paper is to give an updated overview of currently available modelling tools, their capabilities and to serve as an aid for modellers in their process of identifying and choosing an appropriate model. A broad spectrum of modelling tools, ranging from small-scale power system analysis tools to global long-term energy models, has been assessed. Key information regarding the general logic, spatiotemporal resolution as well as the technological and economic features of the models is presented in three comprehensive tables. This information has been validated and updated by model developers or affiliated contact persons, and is state-of-the-art as of the submission date. With the available suite of modelling tools, most challenges of today's electricity system can be assessed. For a future with an increasing share of variable renewables and increasing electrification of the energy system, there are some challenges such as how to represent short-term variability in long-term studies, incorporate the effect of climate change and ensure openness and transparency in modelling studies. Highlights • We review 75 modelling tools currently used for analysing energy and electricity systems. • Updated and validated key information about the models is presented. • The paper can aid new modellers to choose an appropriate model for their purposes. [ABSTRACT FROM AUTHOR]

Global climate change governance has changed substantially in the last decade, with a shift in focus from negotiating globally agreed greenhouse gas (GHG) reduction targets to nationally determined contributions, as enshrined in the 2015 Paris Agreement. This paper analyses trends in adoption of national climate legislation and strategies, GHG targets, and renewable and energy efficiency targets in almost all UNFCCC Parties, focusing on the period from 2007 to 2017. The uniqueness and added value of this paper reside in its broad sweep of countries, the more than decade-long coverage and the use of objective metrics rather than normative judgements. Key results show that national climate legislation and strategies witnessed a strong increase in the first half of the assessed decade, likely due to the political lead up to the Copenhagen Climate Conference in 2009, but have somewhat stagnated in recent years, currently covering 70% of global GHG emissions (almost 50% of countries). In comparison, the coverage of GHG targets increased considerably in the run up to adoption of the Paris Agreement and 89% of global GHG emissions are currently covered by such targets. Renewable energy targets saw a steady spread, with 79% of the global GHG emissions covered in 2017 compared to 45% in 2007, with a steep increase in developing countries. Key policy insights The number of countries that have national legislation and strategies in place increased strongly up to 2012, but the increase has levelled off in recent years, now covering 70% of global emissions by 2017 (48% of countries and 76% of global population). Economy-wide GHG reduction targets witnessed a strong increase in the build up to 2015 and are adopted by countries covering 89% of global GHG emissions (76% not counting USA) and 90% of global population (86% not counting USA) in 2017. Renewable energy targets saw a steady increase throughout the last decade with coverage of countries in 2017 comparable to that of GHG targets. Key shifts in national measures coincide with landmark international events - an increase in legislation and strategy in the build-up to the Copenhagen Climate Conference and an increase in targets around the Paris Agreement - emphasizing the importance of the international process to maintaining national momentum. [ABSTRACT FROM AUTHOR]

Research often ranges from incremental innovations of existing approaches to the development of novel methodologies. The current study seeks to combine both paradigms through consideration of a legacy hydro system. Stretched along the border between Canada and the US and regulated by a 1950 treaty, the Niagara River currently provides almost 5000 MW of renewable power. This paper develops a HEC-ResSim representation of the existing reservoir (power) system and uses this model to explore a variety of possible future scenarios. These possibilities will ultimately include considering the sensitivity of the system to climate change, reducing tourist flows, and exploring using additional storage to augment operational flows, although the current paper particularly details the scenario involving increased power diversion by somewhat relaxing treaty restrictions. Such an arrangement is shown to potentially increase monthly hydro discharges by 16% relative to the current baseline, and thus to permit an additional 1050 GWh of annual generation on the Canadian side alone. This preliminary exploratory study simply evaluates the potential hydro benefits by assessing the interplay between various system constraints if treaty provisions were ever to be reconsidered, and thus sets the stage for considering a variety of other scenarios. [ABSTRACT FROM AUTHOR]

The role of energy transition amidst the energy crisis and how policymakers can drive down emissions while focusing on energy security are critical. Given the geo-political situation, energy crisis volatility, energy shortage and climate change all affect the green transition and the short-term priorities for energy companies and policymakers. Energy security is not an isolated issue but has widespread implications as various sectors depend on energy supply to function properly. Governments around the world are faced with this trilemma, how to balance energy security with energy sustainability while also considering energy affordability. Sustainability has been in focus for about a decade. However, energy security is suddenly becoming one of the most important priorities that policymakers need to consider. Unfortunately, the renewable energy infrastructure is not yet ready to replace the growing volume of energy demand from hydrocarbon, which the world has been dependent on. This means, for now, a surge in energy generation through hydrocarbon to meet the existing energy demand deficit. However, it is important not to lose focus on the challenge of energy sustainability and climate change adaption and mitigation. Where trends like carbon capture and storage; solar, wind, hydro, green hydrogen, etc.; renewable energy infrastructure and integrations, with supply chain and engineering services consideration [in aspect for the growing market in this space] need better attention with regards to investment and full-scale implementation. This paper aims to analyze this 1st energy crisis of green transition with a priori on energy poverty with consideration of major influences and associated impacts. Furthermore, it proposes a specific framework for inclusive investigations, which considers the entire energy ecosystem with consideration of major influences, to enable the policymakers to better drive the green transition. This involves formulating energy policies that are not entirely conservative towards renewable energy sources but instead promote investments in both green and relatively more environmentally benign energy sources compared to high emission hydrocarbons. In this regard, this paper renders exhaustive prospects and recommendations. • The nexus between energy transition, energy poverty and their impacts are investigated. • Influence of climate change, COVID-19, geo-politics, and energy infrastructure on energy transition. • Exhaustive prospects and recommendations are rendered. • Requirement for inclusive investigations and recognition of energy poverty. [ABSTRACT FROM AUTHOR]

As a result of climate change, almost the entire world is focused on generating energy from renewable sources. One of the main challenges is how to ensure sustainable energy development, by knowing the fact that, the energy which comes from renewable sources is directly dependent on climatic conditions. One of the most promising solutions for . sustainability is a smart energy system. This study aims to provide an innovative approach to ensure a sustainable energy supply, a case which can then be implemented in our country. The main purpose of this paper is to show the importance of implementation of Smart Energy System projects, and to analyze current technologies, the transformational solutions of the current traditional system into a smart system, and to enhance their energetic and environmental performance to ensure sustainability. Also, a translation will be given of how these systems work, what are the advantages and challenges. A smart energy system is a 100% renewable energy system, it is cost-effective and does not increase the cost of energy compared to traditional sources. These systems use technologies and resources that are clean, reliable and affordable which will are evaluated based on environmental performance. [ABSTRACT FROM AUTHOR]

Chemie Ingenieur Technik2023, 202300158 https://doi.org/10.1002/cite.202300158 The above article published online on 26 October 2023 in Wiley Online Library (wileyonlinelibrary.com) has been retracted by agreement between the authors, the journal Editor in Chief, Sabine Wiederhold, and Wiley‐VCH GmbH. The retraction has been agreed upon following the identification of calculation errors that invalidate statements of the paper. The authors were not aware of these errors prior to publication and deeply apologize for the oversight. [ABSTRACT FROM AUTHOR]

The promotion of renewable energy nowadays is particularly important not only to mitigate the climate change but also to increase the energy independence. Thus, the aim of this paper is to analyse the impacts of attitudes and perception of the war in Ukraine and environmental aspects on selection of green electricity in Lithuania. The survey analysis conducted in early 2023 showed that only 35% of respondents have selected green electricity. Analysis of the main determinants of green electricity selection showed that attitudes towards energy consumption together with the perception of renewable energy environmental impacts (B = 0.13, p < 0.01), as well as attitudes towards the war impact together with the perception of the renewable energy role in solving energy crisis (B = 0.09, p < 0.01), positively and statistically significantly influenced selection of green electricity. Meanwhile, the interaction of attitudes towards the war impact and the perception of the renewable energy role in achieving energy independence insignificantly (B = −0.05, p = 0.06) determined selection of green electricity. From the socio-demographic variables, only age (B = −0.02, p = 0.003) and gender (B = 0.36; p < 0.01) had a significant effect on this behaviour. Thus, this study gives an additional insight for policymakers and green electricity suppliers on how to increase green electricity selection in the context of the war in Ukraine. [ABSTRACT FROM AUTHOR]

Governments worldwide are setting ambitious targets for renewable energy sources as a response to the ongoing climate crisis, leading to increased investment in offshore wind. While fixed wind structures have restrictive water depth limitations, floating devices are being developed to harness the resource in deeper waters. As part of this development, accurate prediction of ultimate loads and platform motions is crucial for survivability and cost-competitiveness. Present design standards rely on time-consuming methodologies based on irregular sea state data to determine design loads. 'Short design waves' are a potential solution to speed up the process by simulating short wave profiles that target extreme responses, bypassing the need for modelling long-duration irregular sea states. This paper explores the application of short design waves to semi-submersible wind platforms, and aims to determine whether extreme motions produced by these methods are comparable with current design practices. Short design waves show promise for surge and heave extremes, but further refinement is needed to improve pitch predictions and align with industry standards. Based on the present comparison, short design waves have potential within early design stages, where a wide range of environmental conditions are explored, but their reliability and applicability in alternative scenarios requires further investigation. • Short design wave (SDW) predictions of extreme motions of a semi-sub wind platform are explored. • Comparison is made with current design load standards based on 1-hour irregular sea state data. • Established design load methods using irregular sea states shown to be sensitive to random seeding. • Surge and heave predictions are good, but pitch needs improvement to align with industry standards. • SDWs have potential in early design stages to explore a wide range of environmental conditions. [ABSTRACT FROM AUTHOR]

Access to adequate and reliable electricity is paramount for the adaptation and resilience of typhoon-prone coastal communities, particularly in the face of intensifying challenges posed by climate change. Climate-related extreme weather events, such as typhoons and their consequent flooding and storm surges, exert significant pressure on electricity systems in these vulnerable regions, affecting every aspect from generation to transmission, distribution, and end-user utilization. Therefore, urgent action is required to fortify these communities with electric systems that are resilient enough to withstand such meteorological extremes. This review paper examines the far-reaching impacts of extreme weather events on electricity systems and showcases illuminating case studies that highlight innovative strategies to bolster these systems against such extremes. The review emphasizes the pivotal role of meticulous energy planning, strong support from local governments, and the significance of infrastructure hardening in building resilient energy systems. Future research opportunities exist in integrating renewable energy, engaging community members, assessing climate risks, and cross-sectoral resilience. [ABSTRACT FROM AUTHOR]

This paper estimates changes in future energy demand and supply for Indiana due to projected climate change impacts. We first estimate demand changes under both the business-as-usual emissions scenario (RCP 8.5) and a scenario based on reduced emissions consistent with a 2-degree increase in global mean temperature (RCP 4.5), on both a statewide basis and for major urban areas. We then use our adjusted statewide energy demand projections as an input to a comprehensive model of Indiana's energy system, to project expected changes in the state's energy supply under both scenarios. Finally, we consider the potential impacts of two policy scenarios—a carbon pricing scheme and a renewable energy investment tax credit—on emissions and future energy supply choices. Our results suggest that climate change will have a relatively modest effect on energy demand and supply in Indiana, slightly increasing commercial demand and decreasing residential demand but having little effect on energy supply choices. In addition, our results suggest the potential for policy proposals currently being adopted in other states, such as a relatively small carbon price or investment credits for renewable energy sources, to have a larger impact on the state's future energy mix, increasing production from low or zero carbon energy sources and reducing emissions. [ABSTRACT FROM AUTHOR]

This paper presents the editorial for the Renewable and Sustainable Energy Reviews joint special issue devoted to the research work discussed and presented at the 11th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES), held from the 4th September to the 9th September 2016 in Lisbon, Portugal and the 2nd South East European (SEE) SDEWES Conference held from June 15th to June 18th, 2016 in Piran, Slovenia. This special issue is in line with the journal's aim of publishing research from across the ever-broadening field of renewable and sustainable energy with a strong review element. Previous SDEWES conference special issues have gathered a significant knowledge base in the field of sustainable development that reflects the continuous research efforts of the SDEWES research community. Therefore, this editorial provides not only an overview of the papers published in this particular special issue, but also a wider overview of the current trends in the domain of sustainable and renewable energy. This year's special issue focuses particularly on the benefits of the bio-based economy, energy security issues, fossil fuel thermal plant alternatives and environmental constraints, district heating and cooling together with cross sector energy efficiency and energy conservation issues. Sustainable transport systems, the issue of fuel poverty in urban neighbourhoods and renewable energy to support development of peripheral rural areas, optimising passive building design for hot climates and solar-powered heating and cooling are further topics featured in this special issue. In the process of selecting papers for this special issue, the guest editors invited in total 23 extended manuscripts for consideration for publication. After a rigorous review process by expert reviewers overseen by the guest editors a total of 16 articles were accepted for publication. [ABSTRACT FROM AUTHOR]

As a result of the growing global demand for energy, together with the depletion of resources and the growing emphasis on mitigating climate change and greenhouse gas emissions, an urgent need for an evolution of the renewable energy resources has emerged. On the architectural scene, we have become accustomed to seeing buildings incorporated with photovoltaics and wind turbines. Despite the great contribution of biomass as a clean energy producer, the integration of biomass into architecture is quite modest and still in its initial phases. Microalgae, as a plant-based biomass, can outperform other renewable resources with their potential to absorb CO 2 , recycle wastewater, and release O 2 . The limited experience regarding building-integrated microalgae photobioreactors (PBRs) requires shedding light on some issues. So, this paper aims to explore the following: 1) the proper types of PBRs for integration with buildings, 2) the overall bioprocess and the design considerations regarding PBRs and their technical requirements, 3) the environmental and energetic performance of PBRs, 4) their challenges, and 5) their prospects. Thus, the paper's methodology consists of 1) reviewing the promulgated literature concerning microalgae and PBRs, 2) reviewing and analyzing three building-integrated PBRs and three urban-integrated PBRs, and 3) reviewing the environmental and energetic performance of building-integrated PBRs. The paper has concluded that the symbiosis between PBRs and façades encounters some challenges, including 1) the biorefinery infrastructure, 2) the provision of a source of CO 2 , and 3) the high initial cost. On the other hand, the multifaceted environmental prospects of building-integrated PBRs are represented in 1) energy savings; 2) GHG emissions reduction; 3) oxygen and hydrogen release; 4) biofuel production; and 5) wastewater treatment. The unique benefits of the bio-façades through the combination of the technical and biological cycles within buildings inaugurate an innovative approach to sustainability by integrating environmental, energetic, and iconic values. [ABSTRACT FROM AUTHOR]

Global anthropogenic activities resulting in the emission of harmful greenhouse gases (GHGs) to the atmosphere have increased the challenges faced from climate change. The greater awareness of the need to mitigate climate variability has brought about intense focus on the adverse impacts of fossil-fuel based energy on the environment. Being the single largest source of carbon emissions, energy supply has attracted much attention and more so that, climate change impacts extend beyond national boundaries. Since energy use is sine qua non to economic development, scientists have reiterated the necessity of developing and utilising renewable energy. Although, past and present CO 2 emissions have and are majorly caused by industrialized countries, it is envisaged that future GHGs emissions would be mostly from developing countries as they industrialize. Renewable energy sources that include biomass, hydroelectric, wind, solar and hydrothermal systems, are carbon-neutral, releasing relatively no emissions. This paper discusses the initiatives associated with the provision of renewable energy to the energy mix in Nigeria as an indication of the country’s commitment to adopt a sustainable development strategy in shaping the economy. It reviews the literature and employs a discourse analysis to examine the limited use of renewable energy sources in Nigeria and the factors prevailing against their development. The paper concludes by identifying social and political obstacles as most significant roadblocks towards rapid implementation of a green economy through the deployment of renewable energy for sustainable development. [ABSTRACT FROM AUTHOR]

Recent significant changes in technology such as Artificial Intelligence (AI) and big data analysis have a wide impact in many areas of human societies, not least in education. Advances in efficiency of new technologies, with impacts in renewable energy and transport affected by environmental concerns and climate change mitigation, demand a reassessment and adjustment of the industrial structure of the economy. Technological advances enhancing creativity and analytical skills mean people must learn and adapt to a fast-changing economic environment. This paper present some key changes in Australian educational areas in recent years that are important and relevant to the subject of education innovation and philosophy to achieve outcomes in training and sustainable economic development, as anticipated by the community and government. Education courses and curricula in many countries have been transformed by technological advance. It is the swift incorporation of new technologies that best prepares students for the dynamics of economic and social change. Even though technological responsiveness is not a new phenomenon, it is established that the teaching methods found to be most successful include complementary and supplemental courses producing multi-skilled and creative graduates. These courses are delivered with significant emphasis upon self-development skills and are less focused upon traditional content. A move toward horizontal focus and a student-centric balance is the current trend, displacing vertical over-specialisation of learning. Yet, the central role of educator is seen as still appropriate and necessary where the aim is to equip graduates with creative and adaptive skills. [ABSTRACT FROM AUTHOR]

This paper considers key drivers to climate policy development with an emphasis on the role of a jurisdiction's underlying energy resource. The states of Hawaii in the United States and Victoria in Australia provide an insightful comparative case study given their differing energy resources: Hawaii has no native fossil fuel resources but abundant renewable energy options while Victoria has an economy traditionally reliant on cheap, plentiful coal. The Advocacy Coalition Framework is applied to analyze why the two states, despite the different incentives provided by their energy resources, developed similar climate policies in the earlier period of policy response to global warming. Analysis finds the stable parameter of energy resources is counterbalanced by other policy drivers including public opinion, leadership and, in particular, features of policy-making particular to the subnational level that provide a different context for climate policy development to that offered at the national level. [ABSTRACT FROM AUTHOR]

Summary: The produced energy from varied sources in modern power systems is to be optimally planned for planning and operating of power system under the determined limit conditions. Recently, the rising overall people population of the world, the increasing of people requirements, improvements of technology, and ecosystem and global climate changes have caused with the increasing of electric energy demand. One of the most important solution methods to meet this energy demand is considered as utilization of renewable energy sources (RESs) in power systems. The structure of power systems has become with the usage of RESs more complex. The optimal power flow (OPF) from planning and operation problems has converted to difficult problem with RESs integrated into modern power systems. This paper presents the OPF problem of power systems with a high penetration of controllable renewable sources. These kinds of sources are able to inject a determined power since they have a back‐up unit (storage). Uncertain solar irradiance and wind speed are simulated via log‐normal and Rayleigh probability distributions, respectively. The proposed OPF problem with controllable renewable sources is solved by the differential evolutionary particle swarm optimization (DEEPSO) algorithm. Simulations conducted on various test systems illustrate the effectiveness and efficiency of DEEPSO as compared with other algorithms including moth swarm algorithm, backtracking search algorithm, and differential search algorithm. In addition, the Wilcoxon signed‐rank test is applied to show the supremacy, effectiveness, and robustness of DEEPSO algorithm. [ABSTRACT FROM AUTHOR]

In the Republic of Serbia, education on environmental issues in elementary school is very scarce. Environmental protection theme is part of subject's knowledge of nature and/or society, i.e., biology, chemistry, geography, and physics. Also, awareness on the necessity of environment protection among adults should be improved. Thus, the authors of this paper proposed an educational programs on climate change for adolescents that will indirectly transfer their knowledge on their parents or guardians. The educational program will be provided among elementary school children (1-8 grade). The program will cover climate change issues with the focal point on renewable energy resources. The effect of education will be analyzed throughout the survey before and after the program. The effect will be measured both in children and parents. The result should highlight the improvement in knowledge on climate change and raising awareness on this significant issue. [ABSTRACT FROM AUTHOR]

Policies targeting energy efficiency and renewable energy are sometimes viewed as more politically feasible than carbon pricing in pursuit of emission reduction goals. This paper assesses underlying drivers of energy policy development. These factors include economic, social, environmental, and institutional variables. The between estimator for panel data is an appropriate method for our focus on some exogenous variables that vary more across countries than over time. We find that larger oil reserves per capita have a negative relationship with renewable energy policy development. Education and political globalisation have strong positive relationships with both energy-efficiency and renewable-energy policy development. These results suggest that greater participation in global political groups can be an indirect approach toward energy policy development, in cases where direct and immediate policies are hard to implement. OECD countries have higher policy scores by 33 and 25 points in energy efficiency and renewable energy respectively. Blinder-Oaxaca decomposition analysis shows that these higher scores are primarily due to social and political institution predictors rather than economics and physical endowments. • Large-n cross country international sample on continuous policy score measurement. • Political globalisation is positively linked with renewables and energy efficiency policies. • Education is positively linked to energy policy development, especially for efficiency. • Higher OECD countries' policy scores are primarily due to social and political predictors. • Higher incomes are unlikely to lead to automatic improvements in energy policies. [ABSTRACT FROM AUTHOR]

Marine renewable energies can play a key role by reducing the dependency on fossil fuels and, therefore, mitigating climate change. Among them, it is expected that wave energy will experience rapid growth in the upcoming decades. Thus, it is important to know how wave climate will change and how suitable the wave energy converters (WECs) will be to the new wave conditions. This paper aims to evaluate the capability of four different WECs—a WaveRoller type device (WRTD), Atargis, AquaBuoy and RM5—to extract wave energy on the Northwest coast of Spain (NWCS). The analysis was performed using the high-resolution wave data obtained from the Simulating Waves Nearshore (SWAN) model over the near future winters (2026–2045). The energy output (P E), the power load factor (ε), the normalized capture width (NC w) and the operational time (OT) were analyzed. According to these parameters, among the devices that work for intermediate-deep waters, Atargis would be the best option (P E = 1400 ± 56 kW, ε = 55.4 ± 2.2%, NC w = 35.5 ± 4.1% and OT = 84.5 ± 3.3%). The WRTD would also be a good option for shallow nearshore areas with P E = 427 ± 248 kW, ε = 12.8 ± 7.4%, NC w = 48.9 ± 9.6% and OT = 88.7 ± 18.9%. A combination of Atargis and WRTDs is proposed to make up the future wave energy farms on the NWCS. • Dynamical downscaling using SWAN to simulate near-shore wave conditions. • Wave energy converters suitability is analyzed in the context of climate change. • Atargis is the most suitable device to future sea conditions in intermediate waters. • WaveRoller type devices can constitute future wave farms for shallow waters. [ABSTRACT FROM AUTHOR]

• The study investigates HRES sizes to achieve NZEB status for a hotel building. • An optimization analysis of a hotel's grid-connected HRES is presented. • The PV/wind grid-connected system has the lowest NPC and LCOE. • The electricity price of the proposed HRES, at 2.1 ¢/kWh. • The Egypt's retail electricity prices of 6.9 ¢/kWh. The tourism sector is a key source of national income, and the use of renewable energy resources promotes green and sustainable tourism. In addition, ensuring a reliable supply and efficient use of clean energy is a primary objective of Egypt's Vision 2030, as it has a significant impact on the sustainable development and growth of the tourism sector in Egypt. Net-zero energy buildings (NZEBs) are a promising decarbonization effort as they reduce energy consumption while increasing the share of renewable energy. Therefore, it is worth investigating the opportunities for NZEBs applications in tourism sector. This paper presents an optimization analysis of a hotel's grid-connected hybrid renewable energy system (HRES) based on its technical, economical, and environmental prospects. Seven scenarios are considered for on-site generation to match the energy requirements of the specific hotel building. The proposed hybrid systems incorporate photovoltaic (PV), wind turbine (WT), and biogas generators into a grid-connected system for supplying power to a tourist hotel. The size of the microgrid system is optimized to decrease the net present cost (NPC) and levelized cost of electricity (LCOE). The results reveal that the PV/wind grid-connected system, with renewable energy generators consisting of 143 kW of photovoltaic modules and one 20 kW wind turbine with a hub height of 18 m, has the lowest NPC and LCOE. This hybrid energy system has a net present cost of 388 k$, which is significantly lower compared to the electricity grid's cost of 873 k$. The electricity price of the proposed HRES, at 2.1 ¢/kWh, is highly competitive with Egypt's retail electricity prices of 6.9 ¢/kWh. Moreover, grid-connected HRES can lower the pressure on the electricity grid arising from the feed-in of electricity from HRES. Furthermore, the proposed HRES will help slow climate change by reducing GHG emissions and fossil fuel usage. Finally, this study will provide valuable guidance for the practical application of NZEBs in Egypt as well as similar global zones. [ABSTRACT FROM AUTHOR]

European Commission has set clear targets for 2020 regarding energy and environment policy; these targets include 20% cut in greenhouse gas emissions against the 1990 levels. It is believed that adopted strategy has encouraged the renewable energy applications during the last two decades. Moreover, measurement deviations of carbon dioxide flux occurring in respiration chambers has been seen of a great importance to explain the biochemical parameters affecting the climate change issue. This is attributed on many occasions to chamber design constraints and the way they are coupled with the studied site location. This is illustrated by external disturbances whereby when they happen while gas measurements are taken measurement deviations become more evident. This paper surveys the different soil physical, biological and geotechnical parameters and links them to meteorological ones. Consequently it explores their direct and indirect effects to the produced soil efflux. Furthermore this paper proposes several soil temperature models according to the studied case constraints to see what affects soil efflux production. Moreover a clear understanding of what affects the measurement process was achieved through surveying all the internal and external pressure parameters and how they influence the chamber in relation to time. The conclusion is that respiration chamber designers need to preserve chamber internal temperature and pressure to be equal to the outer atmosphere for the case of stabile external conditions. For the case of unstable external conditions design counter measures are incorporated. Furthermore the appropriate gas sensor needs to be selected professionally with emphasis on the importance of installation location inside the chamber. Likewise soil bacterial type and soil temperature also has an influence on efflux production. [ABSTRACT FROM AUTHOR]

India, being one of the fastest-growing economiess in recent times, has witnessed a rise in energy consumption with associated implications on energy availability and energy security. The country recognizes these challenges and has accelerated its efforts with varied degree of success by initiating various programs, policies, and required institutional arrangements to ameliorate these challenges. This paper attempts to review the development of nation’s policy programs to trace the progress so far, in terms of energy efficiency and conservation. Energy being a cross-sectoral issue has been dealt with holistically in this paper, with special reference to the policy instruments that have been instrumental in realizing the energy-saving potential and in integrating renewable energy in building sector. Further, an attempt is made to draw the success/failure with respect to various policies and programs, along with a detailed analysis of various missions under the National Action Plan on Climate Change. [ABSTRACT FROM AUTHOR]

Over the past few years, there has been a growing global consensus related to the importance of renewable energy to minimize the emission of greenhouse gases. The solution is an increase in the number of renewable power plants but unfortunately, this leads to a high dependence on climate variables which are already affected by climate change. Brazil is one of the largest producers of electricity by renewables through its hydro-dominant power generation system. However, hydro-generation depends on water inflows that are directly affected by climate change that consequently affect the electricity production. Therefore, these changes need to be considered in the operation and planning of a hydro-dominant power system. In this paper, we present the effects of different climate scenarios in the water inflows produced by the regional Eta climate model. Normally, studies use an optimization model to make decisions in case of a hydro-thermal scheduling problem and use the assured energy to evaluate the hydro-production. In this analysis, water inflows used in the optimization process consider different trends according to its associated climate scenario. Our paper shows that climate change may drastically impact the system assured energy and consequently, the system's capability to supply load. [ABSTRACT FROM AUTHOR]

Renewable Energy (RE) has been identified as a key tool to counter climate change and enhance energy security. Countries across the globe have been promoting this sector by several policy measures. However, limited research has been undertaken on the economic and environmental efficacy of RE policy instruments, especially in context of emerging economies like India, which have witnessed substantial capacity addition and have set ambitious targets to de-carbonize their economy. This paper identifies 25 innovative practices followed in India which have enabled accelerated RE capacity addition with minimal financial obligations. These include energy entrepreneurship, energy democratization, private sector participation, hedging and apportioning RE procurement, use of auctions with stringent participatory norms, creditworthy counter-party, leverage of risk capital by developmental institutions, regular revision of tariffs, environmental cess on polluting industries, long-term RE purchase trajectory and incentivizing green power output. Results indicate high financial impact of instruments (support of US$ 3–5/MW h over applicable tariff) which gets neutralized when tax inflow is considered. Lower carbon abatement cost (US$ 3–6/tCO2eq) depicts high environmental efficacy. The paper shares best practices from India in terms of efficient use of RE policy enablers, which may be contextualized in other emerging economies as per the local requirements. [ABSTRACT FROM AUTHOR]

This paper provides an analysis of life-cycle assessment (LCA) of Jatropha biodiesel with a view to outline the environmental quality norms of Jatropha biodiesel. The underlying issue is that biofuels need to mitigate the effects of climate change and provide sustainable energy alternatives to fossil fuels. Thus, there is need for empirical evidence on the sustainability of Jatropha biodiesel in order to inform both biofuels policies and development of options for technical intervention to improve the environmental footprint of Jatropha biodiesel. Ten LCAs of Jatropha biodiesel are analyzed in this paper. The paper considers impact categories, which include energy and greenhouse gas (GHG) balance, land-use impact, acidification, and eutrophication. The general trend emerging from this analysis is that although Jatropha biodiesel has positive energy and GHG balances, there are site-specific variances and numerous opportunities for improvement. [ABSTRACT FROM AUTHOR]

Current human activities are seriously eroding the ability of natural and social systems to cope. Clearly we cannot continue along our current path without seriously damaging our own ability to survive as a species. This problem is usually framed as one of sustainability. As concerned professionals, citizens, and humans there is a strong collective will to address what we see as a failure to protect the natural and social environments that supports us. While acknowledging that we cannot do this alone, human factors and ergonomics needs to apply its relevant skills and knowledge to assist where it can in addressing the commonly identified problem areas. These problems include pollution, climate change, renewable energy, land transformation, and social unrest amongst numerous other emerging global problems. The issue of sustainability raises two fundamental questions for human factors and ergonomics: which system requires sustaining and what length of time is considered sustainable? In this paper we apply Wilson (2014) parent-sibling-child model to understanding what is required of an HFE sustainability response. This model is used to frame the papers that appear in this Special Issue. [ABSTRACT FROM AUTHOR]

This paper focuses on the way that United Kingdom Independence Party (UKIP) attempted to communicate its policies and messages about the topic of renewable energy during 2013–2014. Renewable energy is a fruitful topic to consider as it has a strategic importance in the discussion of the future of the UK. The emergent theme from the analysis was not only rurality and renewable energy but the connection of the issue to scepticism about climate change. This paper uses the qualitative analyses the social media posts and a sample of the linked materials, with newspaper coverage, to reveal the key themes in the UKIP discourse. [ABSTRACT FROM PUBLISHER]

This paper starts from the conviction that one of the main environmental problems of today's society is the continuously increasing production of organic wastes. In many countries, sustainable waste management have become major political priorities in order to reduce pollution and greenhouse gas emissions and to avoid, as much as possible, global climate changes. This problem becomes more and more present in our country too. Production of biogas through anaerobic digestion of animal manure and slurries as well as of a wide range of digestible organic wastes, converts these substrates into renewable energy and offers a natural fertiliser for agriculture. That is why we consider that biogas plants will be more and more used in the future. In this paper we show the different stages which must be operated in a biogas plant and the problems which can be met in each of them. [ABSTRACT FROM AUTHOR]

Abstract Biomass has often been regarded as a promising renewable energy resource to mitigate climate change. However, what will be the impact on global surface temperature if biomass replace fossil fuel remain unclear. This paper, through a case study in Uttar Pradesh, India address this issue by assessing biomass resource potential to reduce fossil fuel demand and mitigate climate change. Impact of biomass power related GHG emissions on global surface temperature is estimated using the Absolute Global Temperature change Potential (AGTP) climate metric. Uttar Pradesh can produce 71 Mt surplus biomass annually, equivalent to 7298 MW power. Power density of biomass range between 0.10 and 0.25 Wm-2. Significant amount of GHG emissions reduction is possible if biomass replace fossil fuel as a power source in the region. Annual GHG emissions associated with 1 MWh of power derived from coal, natural gas and biomass would cause 4.10 × 10−7, 2.40 × 10−7 and 1.25 × 10−7 mK rise in global surface temperature, 100 years after an initial emission, indicating potential of biomass power to mitigate climate change. Variation in spatio-temporal distribution and low power density could be delimiting factors in large-scale deployment of biomass power. Graphical abstract Image 1 Highlights • Biomass resources and power potentials are assessed for Uttar Pradesh, India. • GHG emissions from biomass power is assessed and compared with fossil fuels. • Climatic impact of power generation is assessed via novel climate metric. • Biomass power can mitigate climate change by replacing fossil fuels. • Spatio-temporal variability and low power density are limitations of biomass. [ABSTRACT FROM AUTHOR]

Abstract In order to mitigate climate change and reduce fossil fuel dependency in Iran, the government of the country has announced its renewable energy policies to increase the use of renewable energies, but the share of the energy generation mix of Iran is very low due to the lack of public acceptance. These challenges continue and can be hard to overcome at all levels. This paper investigates this problem at regional level by measuring public acceptance towards development of climate-friendly technologies in order to provide required feedbacks to policy-makers of the government for ushering changes in their policies already made or in their executing mechanism, possibly deducting future risks such as public opposition from their end and improving the level of acceptance. This study uses a mixed-methods analytical approach for quantitatively taking that level, including creativity techniques and fuzzy cognitive maps (FCMs). FCMs could directly map out policy-makers' cognitions on the problem. This study provides the mathematical formulation of the problem with its conceptual interpretation to import policy-makers' knowledge into FCMs when the knowledge is gained explicitly with creativity techniques. The authors focused on a case of Solar Water Heater adoption in the city of Behbahan in Khuzestan Province. Graphical abstract Image Highlights • A combinative method for measuring public acceptance of clean energy technologies is proposed. • It provides the mathematical formulation of the acceptance problem with its conceptual interpretation. • It focused on a case study of solar water heater adoption in Iran. [ABSTRACT FROM AUTHOR]

Abstract Vehicle-to-grid (V2G) refers to a technology that could help make the electricity grid more effective, reduce the cost of ownership of electric vehicles (EVs), and help integrate intermittent renewable energy sources. However, despite these advantages, implementation and even knowledge of the technology is not widespread. In order to explore why, we ask the question: what are the barriers that V2G currently faces? To provide an answer, the authors conducted 227 semi-structured interviews with transportation and electricity experts from 201 institutions across seventeen cities within a market currently experimenting with electric mobility and V2G, the Nordic region. Results show that there is an extensive range of barriers facing V2G, with experts suggesting in total 35 categories of barriers. While the literature espouses substantial benefits of V2G, the experts interviewed generally displayed skepticism of the benefits and necessity of V2G in the Nordics. We categorized the top nine discussed barriers into four clusters. These clusters focused on the experts' skepticism of the benefits of V2G, consumer acceptance, economic viability, and regulatory structure for V2G participation. We conclude the paper with policy implications and suggestions for future research. Highlights • We conducted 227 expert interviews to characterize the barriers to vehicle-to-grid. • Experts identified 35 unique categories of barriers of vehicle-to-grid. • We clustered the top nine barriers into four clusters based on similarity. • Expert skepticism and consumer distrust of V2G was highly prevalent. • Benefits of V2G needs to be better communicated to both experts and consumers. [ABSTRACT FROM AUTHOR]