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One of the most prominent issues in the transition to net zero emissions without carbon-based fuels today and in forthcoming years is the effective use of sustainable energy sources. In this current research, the pine sawdust biomass sourced innovative multigeneration plant is proposed and planned for the production of beneficial products. The newly arranged system comprises a Brayton cycle, a supercritical CO 2 Brayton cycle, a multi-stages flash desalination part, a PEM component, and a hot water preparation unit that aims the generate power, hydrogen, freshwater, and hot water. The study also deals with performing thermodynamic performance modeling, sustainability index assessment, and environmental impact evaluation to determine the developed system performance. Additionally, the energetic and exergetic performance approaches are operated to separate components and the entire configuration. After that, the comparison of the different energy conversion scenarios is examined on the basis of the energetic efficiency and CO 2 emission rate. The main findings specify that the developed plant can be capable of 2674 kW net power, 0.003679 kg/s of clean hydrogen, and 2.115 kg/s of distilled water. To conclude, it can be stated that the newly developed combined plant has satisfactory performance, with 44.50% energetic performance and 30.01% exergetic performance. • A novel biomass-based combined plant is proposed and examined. • The production of clean power, hydrogen, freshwater, and hot water is analyzed. • Combination and evaluation of the supercritical Brayton cycle is suggested. • A thermodynamic simulation is performed to determine system' performance. • The developed plant has 44.50% of energy efficiency. [ABSTRACT FROM AUTHOR]

One of the most effective ways to address the environmental issues triggered by fossil fuels is through the use of renewable energy. In this study, clean and sustainable power and hydrogen generation with three renewable energy sources, a wind-solar-geothermal assisted hybrid plant is planned, investigated, and analyzed. An exhaustive thermodynamic performance analysis is executed to specify the system efficiency by the way energy and exergy efficiency methods. Moreover, this developed cycle comprises a solar photovoltaic (PV) unit, a triple flash geothermal power plant, wind turbines for power generation, and a hydrogen generation and liquefaction unit. Additionally, a case study for Isparta is conducted using actual data on wind speed and solar radiation. A parametric analysis, on the other hand, is conducted to figure out the consequences of the examined cycle's performance. In light of the examination outcomes, the developed plant's power rate is figured as 9942 kW. The hydrogen generation rate and sustainability index are also figured out as 0.02143 kg/s and 2.003, respectively. Finally, the proposed hybrid cycle encloses an energetic and exergetic performance of 32.755 % and 50.06 %, respectively. • Clean and sustainable hybrid plant is designed and examined. • A renewable energy-based hydrogen generation plan is proposed. • Energy and exergy analysis is conducted to determine the system performance. • Hydrogen liquefaction unit is also integrated to storage. • Total energy and exergy efficiency is computed as 32.75 % and 50.06 %, respectively. [ABSTRACT FROM AUTHOR]

Expanding energy demands and to tackle with greenhouse gas emissions require new research on the carbon-free energy conversion system, which are renewable energy sources and also hydrogen. Especially, in the coming years, green hydrogen, which is produced using renewable energy sources, will become increasingly significant. This current study presents the design and evaluation of compressed hydrogen generation and beneficial outputs, which are electricity, freshwater, heating, and cooling, with a solar-driven integrated plant. Comprehensive thermodynamic performance evaluation is conducted on the multigeneration plant through energetic and exergetic efficiency methodologies. The proposed study comprises a solar heliostat field, a supercritical Brayton plant, a transcritical Rankine plant, an ejector refrigeration cycle, a desalination process, and a hydrogen generation-compression plant. Furthermore, the innovation and importance of this work are that carbon dioxide fluid is used in the Brayton and Rankine cycle. After conducting the analysis, the findings show that the net power production capacity of the developed system is 653.4 kW. Also, net hydrogen and freshwater production capacities are determined as 2.821 k g h − 1 and 2.951 k g s − 1 . The energetic and exergetic performances of the examined research are determined as 43.77% and 19.61%, respectively. In conclusion, the maximum exergy destruction rate between the plant's sub-units is computed in the solar heliostat field with 4044 k W. • A novel solar energy-based multigeneration plant is designed. • A comprehensive thermodynamic investigation of the multigeneration plant is performed. • Supercritical and transcritical C O 2 -based power plants are used for electricity generation. • The examined plant generated 2.951 kg/s freshwater and 2.821 kg/h hydrogen. • The overall energy and exergy efficiencies are 43.77% and 19.61%, respectively. [ABSTRACT FROM AUTHOR]

Geothermal energy is a promising solution to provide multiple outputs at different temperatures and under different conditions. In this current work, a geothermally powered multigeneration cycle is planned, suggested and studied including a Kalina cycle, an organic Rankine cycle, a thermoelectric generators, a double effect absorption refrigeration system, a dryer, a domestic water heater, a multi-effect desalination processes, a greenhouse, and hydrogen production and storage units. The main objective of this study is to generate power, cooling, heating, hot water, drying, greenhouse heating, hydrogen, oxygen, and freshwater in an environmentally harmless approach. An elaborated thermodynamic analysis of the developed research is calculated by energy and exergy efficiency methods. Furthermore, the parametric modeling is employed to calculate the effect of significant variables on the examined study and subsystems' efficiency. Looking the analysis's findings reveal that the evaluated model's net power generation rate is approximately 298 k W. Additionally, the cooling and heating rates of this integrated combined plant are 1169 k W and 1783 k W , respectively. Moreover, the examined plant produces 0.000392 k g / s of hydrogen and 2.77 k g / s of freshwater. Finally, the examined cycle energy and exergy performance is computed as 0.4248 and 0.3826, respectively. • A new design geothermal energy based combined plant is proposed. • Investigating the integration of the different subsystems. • To examine the fresh water and green hydrogen generation with geothermal energy. • To conduct comprehensive thermodynamic performance analysis. • The overall energy and exergy efficiencies are 0.4248 and 0.3826, respectively. [ABSTRACT FROM AUTHOR]

The current paper deals with the development and analysis of an innovative multigeneration plant, which is powered by geothermal energy, and integrated with the transcritical Rankine cycle ( t C O 2 − R C), proton exchange membrane (PEM) electrolyzer, multi-effect desalination unit (MED), and ejector cooling system (ECS). The main objective of this research paper is to produce power, hydrogen, freshwater, and cooling in an environmentally benign way, by integrating the different subsystems. A comprehensive parametric analysis that is thermodynamic and economic and exergo-environmental impact assessment are addressed. For these parametric analyses, the variation of some important parameters that affect the system performance is examined and illustrated. According to the modeling findings, the net power and hydrogen production capacity of the modeled combined power plant is 982.4 kW and 0.0024 kgs−1, respectively. The cycle's overall energy efficiency is computed to be 40.04%, although its exergetic efficiency is 36.31%. When the irreversibility among the plant components is compared, the highest irreversibility occurred in the PEM water heater with 1508 kW, followed by heat exchangers 1 and 2. Given the economic results, the modeled plant's cost rate is calculated to be 200.2 $/hr. In the end, it can be recommended that this modeled plant is suitable that is from the point of perspective of the performance, economy, and exergo-environmental relations. • A novel multigeneration plant motivated by geothermal energy is proposed. • Modeling and analysis of a multigeneration plant for power, hydrogen, cooling, and freshwater production. • Energy, exergy, economic, and exergo-environmental index analyses are conducted. • Investigating the green and sustainable hydrogen generation method with PEM electrolyzer. • The overall energy and exergy efficiencies are 40.04% and 36.31%, respectively. [ABSTRACT FROM AUTHOR]

Renewable energy-supported multigeneration plants and energy storage systems have important in reducing carbon emissions and also effective use of energy sources. In this study, both a renewable energy source-based energy storage process and a newly developed multigeneration plant are studied through detailed thermodynamic analysis. Here, the energy required for the compressed air storage unit is obtained from the hybrid system of solar and wind energy, and the stored compressed air reacts with natural gas in the Brayton cycle and goes to the multigeneration cycle. Furthermore, the key aim of this research is the examination of a multigeneration system for power, heating, cooling, hot water, and hydrogen generation using energy and exergy efficiency methods. The investigated model includes a thermoelectric generator, an organic Rankine cycle, a hydrogen production and liquefaction unit, a cooling system with an ejector, a Brayton cycle, a Rankine cycle with three turbines, and a compressed air energy storage unit with solar photovoltaic and wind turbines. Moreover, to observe the impact of some substantial design variables on the proposed subsystems and the entire plant's performance and irreversibility rate, thermodynamic analysis is applied parametrically. In light of assessment findings, the net power generation rate of the entire system is 31,308 kW at 25 °C reference condition. Also, the net hydrogen generation capacity, cooling capacity, and heating capacity of the total plant are 0.0499 kg/s, 3650 kW, and 4281 kW. In conclusion, the energetic and exergetic efficiencies of the entire model are determined as 0.5258 and 0.4867. [ABSTRACT FROM AUTHOR]

• A newly designed multigeneration system motivated by solar energy is proposed. • Planned and examination of a multigeneration plant for power, hydrogen, heating, and freshwater generation. • Energy, exergy and economic analyses are conducted. • Investigating the green and sustainable hydrogen generation method with PEM electrolyzer. • The overall energy and exergy efficiencies are 33.92% and 30.83%, respectively. • The hydrogen generation capacity of this modeled plant is 1.49 kgh−1. This research delves into an innovative solar energy integrated combined plant, a cutting-edge technology that produces a range of valuable outputs including power, freshwater, hydrogen, and hot water for heating. The developed scheme incorporates a solar collector, supercritical Brayton cycle, transcritical Rankine cycle, multi-effect desalination unit, and PEM electrolyzer. A comprehensive evaluation of the system's thermodynamic and economic performance, including energy and exergy efficiency, exergy destruction rate, hydrogen generation cost, and total investment cost rates, is conducted. The analysis revealed a net power production load of 505.8 kW, hydrogen capacity of 0.0004139 kgs−1, and a freshwater production rate of 5.698 kgs−1. The research yielded promising results, with the total exergy destruction rate calculated at 5706 kW, and the solar collector identified as the most efficient component. The energetic and exergetic performance of the developed scheme is determined to be 33.92 % and 30.83 %, respectively, indicating a high level of efficiency. The economic cost studies further revealed that the entire investment cost rate of the proposed scheme is a mere 0.0019 $s−1, demonstrating the potential for cost-effective implementation. [ABSTRACT FROM AUTHOR]

Today, effective and low-emission energy systems have been needed to combat environmental problems and to satisfy the growing energy requirement in a sustainable way. In this case, it has gained importance to the production of different useful commodities with the multigeneration plant that is obtained by integrating different systems. With this viewpoint, the key objective of this work is to design and analyze the solar collector and combustion chamber-assisted multigeneration model for power, heating, hydrogen, ammonia and freshwater generation. A newly designed plant comprises a gas turbine cycle, which includes a parabolic dish solar collector and combustion chamber, a Rankine power plant, a multi-effect desalination part, a hydrogen generation part, an ammonia generation part, and a solid oxide fuel cell unit. Comprehensive thermodynamic modeling, economic analysis and multiobjective optimization are executed to observe the performance of the whole plant and sub-system by employing energetic and exergetic approaches. Moreover, a parametric investigation is addressed to review the impacts of some important point changes on the modeled plant's efficiency. Analyses consequences display that the power and hydrogen generation amounts are 12,835 kW and 0.0607 kgs−1. Also, freshwater generation capacity with desalination unit is computed as 4.89 kgs−1. Moreover, total cost rate of the modeled plant is computed as 1074 $/h. Finally, the evaluated plant's energetic and exergetic efficiency is 58.38% and 54.21%, respectively. • A new design multigeneration plant is proposed and analyzed. • A new multigeneration plant is investigated for generating of power, heating, ammonia, freshwater, and hydrogen. • A comprehensive thermo-economic analysis is conducted. • To determine the optimum point (i.e., lowest cost and maximize exergy efficiency) an optimization study is addressed. • This proposed plant has 58.38% energy efficiency and 54.21% exergy efficiencies. [ABSTRACT FROM AUTHOR]

Because of the requirement of the utilization of energy resources in a way that is both effective and efficient, solid oxide fuel cells have become a notable preference due to their advantages such as high efficiency and use with different fuels. In addition, the integration of these systems in the production of alternative fuels such as hydrogen and ammonia are important for a sustainable future to combat environmental problems. For this reason, the main intention of this paper is to introduce a new plant combining the different systems that use the solid oxide fuel cell for a cleaner and sustainable future. In the modeled work, a solid oxide fuel cell, a gas turbine, an organic Rankine cycle, a Kalina cycle with ejector, a hydrogen generation and storage process, a wood steaming plant, and an ammonia production system is integrated, to generate useful products. Detailed thermodynamic modeling is performed through energy and exergy methods, to determine the performance of the advised system and subsystem. Moreover, energy efficiency, exergy efficiency, and exergy destruction analyses methods are applied to each sub-plant and the whole system separately. In addition, parametric research is carried out to examine the effects of modifying key parameters on the plant's and subsystems' performance. Looking at the analysis results, the amount of the hydrogen and ammonia generation capacities of this work are 0.0085 kgs−1and 0.2023 kgs−1, respectively. In addition, the modeled power plant produces a power rate of about 20,180 kW. As a result, this proposed study is calculated to have 61.04% energy efficiency, and 57.13% exergy efficiency. • A novel combined plant with SOFC is developed for hydrogen and ammonia generation. • Modeled system is investigated thermodynamically with energy and exergy efficiencies. • Parametric analysis is conducted to determine the how the effect of each parameter on the system's performance. • Overall energy and exergy efficiency of this modeled plant is 61.04% and 57.13%, respectively. [ABSTRACT FROM AUTHOR]

Renewable energy sources have great importance to deal with environmental detriments. To clean and sustainable future, various design renewable energy-assisted plants are of great importance. The current study examines the design and investigation of a double-flash binary geothermal energy-powered integrated system for useful products. For the purpose of producing hydrogen, power, heating, and drying, the proposed work basically consists of two steam turbines, a transcritical carbon dioxide Rankine cycle (tCO 2 -RC) , a PEM electrolyzer, a domestic water heater (DHW), and a dryer. The chief target of this research study is to develop a more efficient plant as well as multigeneration productions. Additionally, detailed parametric modeling is carried out using energetically and exergetically approaches to examine this designed plant in the context of thermodynamic analysis. The variation of some parameters that influence the plant's performance, such as geothermal water temperature, flash pressure, and ambient temperature, are parametrically investigated. Subsequently, the thermodynamic simulation results show that the advised integrated plant produces 4431 kW electrical power. Also, the amount of the hydrogen generation capacity is 0.006809 kgs−1. The tCO 2 -RC sub-plant's energetic and exergetic performance is determined as 6.18% and 27.14%, respectively. Furthermore, the suggested integrated plant's energetic and exergetic performances are 26.20% and 37.49%. From the results, it can be finalized that the integration of various systems with the geothermal power plant is successfully possible and, in this way, there will be an increase in system performances. • A new double-flash geothermal power plant is proposed. • Transcritical CO 2 Rankine cycle is integrated and utilized for power generation. • Thermodynamic performance examination of for whole system and sub-system is conducted. • Proposed total system has 26.20% energetic efficiency. [ABSTRACT FROM AUTHOR]

Summary: This paper proposes the design of a new solar power‐based multigeneration system for generating hydrogen, ammonia, methane, and other beneficial outputs. This combined plant consists of the solar plant, Rankine cycle, organic Rankine cycle, single‐effect absorption with ejector, carbon dioxide capture, hydrogen, ammonia, methane, drying, hot, and freshwater generation plants. The overall plant is investigated utilizing the Engineering Equation Solver software. The energy and exergy efficiencies of the integrated plant are computed as 0.6689 and 0.6227. In addition, the largest exergy destructions in the system are 6924 and 4037 kW, which occur at the Rankine cycle and solar power cycle, respectively. Moreover, the thermodynamic performance of the combined plant is investigated through parametric works and the impacts of plant working conditions on the plant efficiencies are evaluated. [ABSTRACT FROM AUTHOR]

A novel multigeneration plant that's using natural gas for power, hydrogen, ammonia, and hot water generation, is planned and analyzed, in the current paper. The suggested combined plant integrated with four sub-systems, which are the Brayton cycle, reheat Rankine cycle, the high-temperature steam electrolyzer for hydrogen production, and ammonia synthesis processes. Also, thermodynamic analysis and environmental impact assessment are conducted for the designed plant and sub-systems. Moreover, the sustainability index analysis of this proposed study is conducted. The effects of some important indicators on the performance and on the environmental impact of the modeled system and sub-processes are also studied. According to analyses results, it is noted that the energetic and exergetic efficiencies of the suggested system are 51.83% and 70.27%, respectively, and also the total CO 2 emission rate is 11.4 kg/kWh for the integrated plant. Furthermore, the total irreversibility rate is computed as 40007.68 kW, and furthermore, the combustion chamber has a maximum irreversibility rate with 20,033 kW, among the proposed plant components. •Modeling of the gas turbine based a new integrated system for power, hydrogen, ammonia and hot water production. •The effects of some important indicators on the beneficial outputs are observed. •A performance evaluation is conducted through energy and exergy efficiencies. •The environmental impact assessment of the modeled system is carried out. [ABSTRACT FROM AUTHOR]

Increasing environmental concerns and decreasing fossil fuel sources compel engineers and scientists to find resilient, clean, and inexpensive alternative energy options Recently, the usage of renewable power resources has risen, while the efficiency improvement studies have continued. To improve the efficiency of the plants, it is of great significance to recover and use the waste heat to generate other useful products. In this paper, a novel integrated energy plant utilizing a geothermal resource to produce hydrogen, ammonia, power, fresh water, hot water, heated air for drying, heating, and cooling is designed. Hydrogen, as an energy carrier, has become an attractive choice for energy systems in recent years due to its features like high energy content, clean, bountiful supply, non-toxic and high efficiency. Furthermore in this study, hydrogen beside electricity is selected to produce and stored in a hydrogen storage tank, and some amount of hydrogen is mixed with nitrogen to compound ammonia. In order to determine the irreversibilities occurring within the system and plant performance, energy and exergy analyses are then performed accordingly. In the design of the plant, each sub-system is integrated in a sensible manner, and the streams connecting sub-systems are enumerated. Then thermodynamic balance equations, in terms of mass, energy, entropy and exergy, are introduced for each unit of the plant. Based on the system inputs and outputs, the energy and exergy efficiencies of the entire integrated plant is found to be 58.68% and 54.73% with the base parameters. The second part of the analysis contains some parametric studies to reveal how some system parameters, which are the reference temperature, geothermal resource temperature and mass flow rate, and separator inlet pressure in the geothermal cycle, affect both energy and exergy efficiencies and hence the useful outputs. • A new geothermal energy based multigeneration system is proposed. • A thermodynamic assessment is carried out through energy and exergy approaches. • The energy and exergy efficiencies of the system are found as 58.68% and 54.73%. • The hydrogen and ammonia production rates are determined as 0.0285 kg/s and 0.1112 kg/s. [ABSTRACT FROM AUTHOR]

In this paper, a comprehensive thermodynamic evaluation of an integrated plant with biomass is investigated, according to thermodynamic laws. The modeled multi-generation plant works with biogas produced from demolition wood biomass. The plant mainly consists of a biomass gasifier cycle, clean water production system, hydrogen production, hydrogen compression, gas turbine sub-plant, and Rankine cycle. The useful outputs of this plant are hydrogen, electricity, heating and clean water. The hydrogen generation is obtained from high-temperature steam electrolyzer sub-plant. Moreover, the membrane distillation unit is used for freshwater production, and also, the hydrogen compression unit with two compressors is used for compressed hydrogen storage. On the other hand, energy and exergy analyses, as well as irreversibilities, are examined according to various factors for examining the efficiency of the examined integrated plant and sub-plants. The results demonstrate that the total energy and exergy efficiencies of the designed plant are determined as 52.84% and 46.59%. Furthermore, the whole irreversibility rate of the designed cycle is to be 37,743 kW, and the highest irreversibility rate is determined in the biomass gasification unit with 12,685 kW. • A biomass gasification based multigeneration plant is proposed for useful products. • A comprehensive thermodynamic analysis is modeled with EES software. • Hydrogen generation and compression sub-systems are suggested and investigated. • The energy and exergy efficiencies of the examined plant are 52.84% and 46.59%, respectively. • The total hydrogen generation rate is found as 0.074 kg/s. [ABSTRACT FROM AUTHOR]

In the examined paper, a solar and wind energy supported integrated cycle is designed to produce clean power and hydrogen with the basis of a sustainable and environmentally benign. The modeled study mainly comprises of four subsystems; a solar collector cycle which operates with Therminol VP1 working fluid, an organic Rankine cycle which runs with R744 fluid, a wind turbine as well as hydrogen generation and compression unit. The main target of this work is to investigate a thermodynamic evaluation of the integrated system based on the 1st and 2 nd laws of thermodynamics. Energetic and exergetic efficiencies, hydrogen and electricity generation rates, and irreversibility for the planned cycle and subsystems are investigated according to different parameters, for example, solar radiation flux, reference temperature, and wind speed. The obtained results demonstration that the whole energy and exergy performances of the modeled plant are 0.21 and 0.16. Additionally, the hydrogen generation rate is found as 0.001457 kg/s, and the highest irreversibility rate is shown in the heat exchanger subcomponents. Also, the net power production rate found to be 195.9 kW and 326.5 kW, respectively, with organic Rankine cycle and wind turbine. The final consequences obtained from this work show that the examined plant is an environmentally friendly option, which in terms of the system's performance and viable, for electrical power and hydrogen production using renewable energy sources. • A solar and wind energy based integrated system is proposed and evaluated. • Renewable energy-assisted hydrogen and power production is investigated. • The detailed performance evaluation of the system is done through energetic and exergetic assessment. • The energy and exergy efficiencies of the whole system are determined as 0.21 and 0.16, respectively. [ABSTRACT FROM AUTHOR]

In this article, an extensive thermodynamic performance assessment for the useful products from the solar tower and high-temperature steam electrolyzer assisted multigeneration system is performed, and also its sustainability index is also investigated. The system under study is considered for multi-purposes such as power, heating, cooling, drying productions, and also hydrogen generation and liquefaction. In this combined plant occurs of seven sub-systems; the solar tower, gas turbine cycle, high temperature steam electrolyzer, dryer process, heat pump, and absorption cooling system with single effect. In addition, the energy and exergy performance, irreversibility and sustainability index of multigeneration system are examined according to several factors, such as environment temperature, gas turbine input pressure, solar radiation and pinch point temperature of HRSG. Results of thermodynamic and sustainability assessments show that the total energetic and exergetic efficiency of suggested paper are calculated as 60.14%, 58.37%, respectively. The solar tower sub-system has the highest irreversibility with 18775 kW among the multigeneration system constituents. Solar radiation and pinch point temperature of HRSG are the most critical determinants affecting the system energetic and exergetic performances, and also hydrogen production rate. In addition, it has been concluded that, the sustainability index of multigeneration suggested study has changed between 2.2 and 3.05. • A novel solar energy based multigeneration system for useful outputs commodities is proposed. • Solar energy is used in the suggested system as the heat source. • The proposed study is analyzed with thermodynamics methods, which are energy and exergy efficiencies viewpoints. • Total energetic and exergetic performance of suggested paper are calculated as 60.14%, 58.37%, respectively. [ABSTRACT FROM AUTHOR]

In this study, a new solar power assisted multigeneration system designed and thermodynamically analyzed. In this system, it is designed to perform heating, cooling, drying, hydrogen and power generation with a single energy input. The proposed study consists of seven sub-parts which are namely parabolic dish solar collector, Rankine cycle, organic Rankine cycle, PEM-electrolyzer, double effect absorption cooling, dryer and heat pump. The effects of varying reference temperature, solar irradiation, input and output pressure of high-pressure turbine and pinch point temperature heat recovery steam generator are investigated on the energetic and exergetic performance of integration system. Thermodynamic analysis result outputs show that the energy and exergy performance of overall study are computed as 48.19% and 43.57%, respectively. Moreover, the highest rate of irreversibility has the parabolic dish collector with 24,750 kW, while the lowest rate of irreversibility is calculated as 5745 kW in dryer. In addition, the main contribution of this study is that the solar-assisted multi-generation systems have good potential in terms of energy and exergy efficiency. • A new solar energy assisted multi-generation system is developed. • Overall energy and exergy efficiencies of system are evaluated. • Energetic and exergetic performance of the overall study are calculated as 48.19% and 43.57%. • The highest rate of irreversibility has the parabolic dish collector sub-system. [ABSTRACT FROM AUTHOR]

Highlights • A solar power-based system for hydrogen production and liquefaction is suggested. • Thermodynamic assessment of the integrated system is investigated. • Impact of design indicators on the power and hydrogen generation rate is evaluated. Abstract In this study, a new combined gasification process using various waste materials for multigenerational operation, containing the hydrogen, power, heating-cooling and hot water generation. In the present multigenerational plant, a waste material gasifier component is combined with the Brayton cycle, Stirling engine cycle, single effect absorption cooling cycle and proton exchange membrane electrolyzer for multiple outputs generation. To analyze and evaluate this integrated system, a comprehensive thermodynamic analysis and assessment for the multigeneration plant components is introduced, the second-law efficiency, associated with the overall system and its sub-systems are described, and the impacts of some arrangements and working statuses on the plant efficiency are investigated. The study results show that, this integrated plant has an overall energetic efficiency of 61.57% and an overall exergetic efficiency of 58.15%, when the produced net power is 94 MW, and also hydrogen generation rate is 0.077 kg/s, respectively. [ABSTRACT FROM AUTHOR]

In this paper, thermodynamic analysis and assessment of a novel geothermal energy based integrated system for power, hydrogen, oxygen, cooling, heat and hot water production are performed. This integrated process consists of (a) geothermal subsystem, (b) Kalina cycle, (c) single effect absorption cooling subsystem and (d) hydrogen generation and storage subsystems. The impacts of some design parameters, such as absorption chiller evaporator temperature, geothermal source temperature, turbine input pressure and pinch point temperature on the integrated system performance are investigated to achieve more efficient and more effective. Also, the impacts of reference temperature and geothermal water temperature on the integrated system performance are studied in detail. The energetic and exergetic efficiencies of the integrated system are then calculated as 42.59% and 48.24%, respectively. [ABSTRACT FROM AUTHOR]

In this paper, we propose an integrated system aiming for hydrogen production with by-products using geothermal power as a renewable energy source. In analyzing the system, an extensive thermodynamic model of the proposed system is developed and presented accordingly. In addition, the energetic and exergetic efficiencies and exergy destruction rates for the whole system and its parts are defined. Due to the significance of some parameters, the impacts of varying working conditions are also investigated. The results of the energetic and exergetic analyses of the integrated system show that the energy and exergy efficiencies are 39.46% and 44.27%, respectively. Furthermore, the system performance increases with the increasing geothermal source temperature and reference temperature while it decreases with the increasing pinch point temperature and turbine inlet pressure. [ABSTRACT FROM AUTHOR]

In the present study, a novel supercritical hydrogen liquefaction process based on helium cooled hydrogen liquefaction cycles to produce liquid hydrogen is thermodynamically analyzed and assessed. The exergy analysis approach is used to study the exergy destruction rates in each component and the process efficiency. The energy and exergy efficiencies of liquefaction process are found to be 70.12% and 57.13%, respectively. In addition, to investigate the process efficiency more comprehensively to see how it is affected by varying process parameters and operating conditions, some parametric studies are undertaken to examine the impacts of different design variables on the energy efficiency, exergy efficiency and exergy destruction rates of the hydrogen liquefaction process. The results show that the increases in the cycle pressure of hydrogen and helium result in increasing hydrogen liquefaction process exergy efficiency and providing a smaller pinch point temperature difference of catalyst beds related with the heat transfer surface area and more efficiently process. [ABSTRACT FROM AUTHOR]

Total energy consumption per capita of any country is a critical input for the economic and social development. But nowadays, the current energy production systems are not sustainable and they are not environment friendly. Increased fossil energy consumptions in manufacturing, transportation and standard of living in the growing population have the highest impact on the environment in terms of global warming potential and air pollution. Also fossil fuel prices are increasing because of shortening of fossil fuel sources. Sustainable development improves standard of life economically and environmentally over the long term in a way that must be supported by the industrial structure of the country. In order to sustain energy availability and keep environment livable for future generations, finding new alternatives is necessary. Increased awareness of society about environmental issues and fossil energy sources depletion support new clean alternatives. These alternatives are one of the important and determinant policy areas for the countries, and should include both short and long term energy policies. This paper discusses the environmental pollution caused by energy consumption, and the role of conventional and renewable energy technologies as one component of the effective sustainable development and solution. Also, renewable energy potential of Turkey for assessment of the green energy systems is investigated in terms of sustainable development, environmental impact and prices. All the given results in this paper will be useful to researchers, engineers, decision and policy makers in industry and government. [ABSTRACT FROM AUTHOR]

Highlights: [•] Development of a new multi-generation system for solar-based coal gasification and power production. [•] Evaluation of the exergy efficiency and destruction in each process of the integrated solar and coal based system. [•] Investigation of varying operating conditions on the exergy efficiency and destruction of the integrated system. [•] Parametric studies are performed for the combined system performance. [ABSTRACT FROM AUTHOR]

• A novel gas turbine-based system integrated with a desalination unit is proposed. • Examining the thermodynamic and environmental impact analyses of integrated plant. • Single-generation produces 37% more carbon dioxide emissions than multi-generation. • The energy and exergy efficiencies of the integrated system are 0.6076 and 0.5671. Increasing environmental problems are of great importance in the development of efficient energy utilization. This article proposed an innovative design gas turbine-based multi-generation plant that integrating a desalination unit for advanced energy management and utilization. Furthermore, this modeled plant comprises a Brayton cycle, a reheat Rankine cycle, an organic Rankine Cycle which does with ammonia, a greenhouse, a Proton Exchange Membrane electrolyzer, and a desalination component. The main purpose of this study is also to provide beneficial commodities such as energy, hydrogen, heating, freshwater, in addition to this to reduce the emission rate by integrating different subsystems, and also to increase system performance. On the other hand, comprehensive thermodynamic assessment and environmental impact evaluation are made that are energy efficiency, exergy efficiency, carbon dioxide emission rate, and sustainability index evaluations, for the overall model and sub-systems. The conclusions of the analysis demonstrated that the whole plant's energy and exergy effectiveness are determined as 0.6076 and 0.5671, respectively, while the carbon dioxide emission rate of the planned model is 0.31 t/MWh. The whole irreversibility of the advised model is 2679.09 kW, and also the maximum exergy destruction rate is found in the combustion chamber with 1216 kW. Moreover, the proposed configuration system has a hydrogen production amount of 0.001742 kgs−1 and a clean water production amount of 0.7647 kgs−1. [ABSTRACT FROM AUTHOR]

• A new renewable energy assisted multigeneration plant is introduced for useful commodities. • A biomass assisted combined plant is analyzed in terms of thermodynamic and economic viewpoints. • The whole energetic and exergetic performances of examined plant are 63.84% and 59.26%, respectively. • The overall purchase cost rate of suggested cycle is about 2000 $/s. In this paper, a novel renewable power-assisted multigeneration system is introduced for useful commodities such as cooling, hydrogen, heating, drying, hot water, and power generations. The biomass energy is preferred as a renewable power source. The proposed plant is including the biomass gasifier unit, gas turbine cycle, Kalina cycle, reverse osmosis unit, proton exchange membrane electrolyzer, absorption cooling cycle, dryer and heat pump subsystem. The primary purpose of this paper is to analyze a biomass assisted combined plant in terms of thermodynamic and economic viewpoints. In this regard, the thermodynamic performance, exergy destruction rate and economic examination are performed according to the various parameters. Results demonstrated that the whole energy and exergy efficiencies of the examined plant are 63.84% and 59.26%, respectively. Furthermore, the total irreversibility and hydrogen production rates are found as 53,406 kW and 0.072 kg/s. The overall purchase cost rate of the suggested cycle is about 2000 $/s. [ABSTRACT FROM AUTHOR]

In this study, the detailed thermodynamic assessment of an integrated process based on heat pipe evacuated tube solar collectors for hydrogen production is provided for more efficiently process designs. An integrated process consists of the solar heat pipe collector, photovoltaic panels, PEM electrolyzer and Linde-Hampson hydrogen liquefaction process are considered and analyzed thermodynamically for hydrogen production and liquefaction aims. The energetic and exergetic efficiencies of this integrated process are calculated as 0.2297 and 0.1955, respectively. Based on the parametric study, the effectiveness of the solar energy based integrated process is also highly dependent on the solar flux and ambient conditions. [ABSTRACT FROM AUTHOR]