16 results on '"Bühler, Fabian"'
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2. A comparative assessment of electrification strategies for industrial sites: Case of milk powder production
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Bühler, Fabian, Zühlsdorf, Benjamin, Nguyen, Tuong-Van, and Elmegaard, Brian
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- 2019
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3. Energy, exergy and advanced exergy analysis of a milk processing factory
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Bühler, Fabian, Nguyen, Tuong-Van, Jensen, Jonas Kjær, Holm, Fridolin Müller, and Elmegaard, Brian
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- 2018
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4. Spatiotemporal and economic analysis of industrial excess heat as a resource for district heating
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Bühler, Fabian, Petrović, Stefan, Holm, Fridolin Müller, Karlsson, Kenneth, and Elmegaard, Brian
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- 2018
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5. Industrial excess heat for district heating in Denmark
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Bühler, Fabian, Petrović, Stefan, Karlsson, Kenneth, and Elmegaard, Brian
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- 2017
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6. MUSE4Anything
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Bühler, Fabian
- Abstract
Many projects in the digital humanities need specialized tools to store and work with their data. MUSE is a digital humanities project researching film costume patterns that uses a custom-built data repository. MUSE4Music is another digital humanities project following the methodology from MUSE. Because the data for the MUSE4Music project has a different structure, a completely new custom data repository had to be built. Although the methodology used in both projects is generic, the tools used are not. Building a custom data repository for a similar project requires a huge upfront investment. A generic data repository could solve this problem and enable a variety of different projects that use similar methods as the MUSE project. This thesis is about the development of such a generic MUSE4Anything repository. Experiences from both the MUSE and MUSE4Music project are used to inform the implementation. The MUSE4Anything repository supports completely user definable ontologies. For this purpose the MUSE4Anything repository contains a taxonomy editor and an editor for the object types of the ontology., Viele Projekte in den Digital Humanities brauchen spezialisierte Werkzeuge um ihre Daten zu speichern und zu verwalten. MUSE ist ein Projekt der Digital Humanites, das Muster in Filmkostümen mithilfe eines speziell angefertigten Daten-Repositorys erforscht. MUSE4Music ist ein weiteres Projekt der Digital Humanites, das die Methoden von MUSE verwendet. Weil die Form der Daten des MUSE4Music Projekts anders ist, musste ein neues auf MUSE4Music angepasstes Daten-Repository angefertigt werden. Obwohl die Methodik beider Projekte generisch ist, sind die Werkzeuge Spezialanfertigungen. Ein speziell angefertigten Daten-Repository zu erstellen erfordert einen großen Einsatz. Dieses Problem kann durch ein generisches Daten-Repository, das unterschiedliche Projekte die die Methodik von MUSE anwenden ermöglicht, gelöst werden. Diese Masterarbeit handelt von der Entwicklung eines solchen generischen Daten-Repositorys, MUSE4Anything. Erfahrungen von MUSE und MUSE4Music werden als Grundlage für das Design von MUSE4Anything genutzt. Das MUSE4Anything Repository unterstützt vollständig benutzerdefinierte Ontologien. Dafür enthält es einen Editor für Taxonomien und einen Editor für die Datentypen von Objekten der Ontologie.
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- 2021
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7. Sector Coupling: Concepts, State-of-the-art and Perspectives
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Münster, Marie, Sneum, Daniel Møller, Pedersen, Rasmus Bramstoft, Bühler, Fabian, Elmegaard, Brian, Giannelos, Spyros, Zhang, Xi, Strbac, Goran, Berger, Mathias, Radu, David, Elsaesser, Damian, Oudalov, Alexandre, and Iliceto, Antonio
- Abstract
EtipSnet is issuing this White Paper on a transversal topic currently high in R&D and Innovation agendas across Europe and beyond. The purpose is to contribute to the debate with sound, unbiased information and future outlooks from experts spanning the wide and articulated knowledge base constituing the EtipSnet platform. As per definition of White Paper, no specific positions are taken towards or against each technology or process; rather, the objetives are: - to establish a shared ground of definitions, concepts and common language/understandings on the topic; - to propose a structured mindset for analysing in a consistent way the projects proposed in the framework of sector coupling and to assess the relevant business cases; - contents-wise, to provide the state-of-the-art and perspective of conversion and end-use technologies; - to give an outlook at the potential application deployment in the horizon of RD&I Roadmap; - possibly, to identify at early stage the barriers to deployment, both technical and non-technical; - to present some use-cases. The target audience is therefore the energy R&D community in wide sense, decision makers, grid operators, project proponents, companies and utilities involved in the set-up of projects in this field.
- Published
- 2020
8. Allocation of investment costs for large-scale heat pumps supplying district heating
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Pieper, Henrik, Ommen, Torben, Bühler, Fabian, Lava Paaske, Bjarke, Elmegaard, Brian, and Markussen, Wiebke Brix
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District heating ,Large-scale heat pumps ,Heat sources ,SDG 7 - Affordable and Clean Energy ,Energy planning ,Investment costs - Abstract
Large-scale heat pumps (HPs) are proposed as a technology to efficiently utilize intermittent wind power and other renewable sources. More than 25 large-scale HPs have been installed over the past decade to supply district heating (DH) in Denmark. A continuous increase is expected in the coming years. The HP projects differ in size, configuration, components and heat source. All these have an impact on the investment costs, which poses challenges for estimating costs, e.g. when planning new HP projects. For this paper, the investment costs of existing and planned electrically driven large-scale HPs were analyzed. All analyzed HPs use natural refrigerants and supply DH in Denmark. The total investment costs were divided into different categories to identify cost correlations for each of them depending on the heat source and HP capacity. The developed cost correlations were combined and verified by comparing the resulting correlations with the total investment costs of the considered HPs. Different intervals of the specific total investment costs for HPs depending on the heat source and HP capacity were derived. They identified the most and least expensive heat sources for HP capacities between 0.5 MW and 10 MW. It was shown that a considerable amount (~50 %) of the investment costs was placed on other parts than the HP itself.
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- 2018
9. Energy efficiency in the industry: A study of the methods, potentials and interactions with the energy system
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Bühler, Fabian
- Abstract
The industry sector has an important role in decarbonising the energy system, as recognised by the European Commission in their 2050 roadmap to a low carbon economy. It has a high share in the final energy use of the European Union, which in 2016 relied heavily on fossil fuels. A shift to a more sustainable energy use is thus needed, requiring both an increased share of renewable energy and a reduction in energy use.In this thesis the manufacturing industry was analysed to show its potential to improve energy use on an energy system and process level. For this purpose the inefficiencies of the industry sector of Denmark were taken as an example and quantified using energy and exergy methods. The developed models were used to quantify the amount of industrial excess heat. Based on these mappings, the potential for recovering and exploiting excess heat was analysed, which required the development of new methods to locate potentials. The methods included spatial, temporal and economic elements to have a realistic assessment of national potentials. This was complemented with multiple case studies, for which the model input uncertainties were taken into account. The second part of the thesis considered specific production processes and methods for assessing them. For the case study of a milk powder production system, different engineering and advanced thermodynamic methods were used for the analysis. The different methods, which include pinch and exergy analyses, located and quantified different optimisation potentials, which were compared against each other. At last, specific optimisation opportunities were identified and evaluated. These consisted of a retrofit heat exchanger network and the integration of heat pumps and solar thermal energy.The results show that the energy efficiency of the Danish manufacturing industry was 80 % and only 72 % when taking the utility system into account. The losses are often in the form of recoverable excess heat. It was found that 1.5 TWh of excess heat could be cost-effectively used for district heating. The tool developed for the case studies enables to overcome some of the barriers for the utilisation of excess heat. It assesses heat sources and possible uses considering the uncertainties and determining important model parameters.The analysis of the dairy factory resulted in potentials for improvement and highlighted merits and drawbacks of the applied methods. The advanced methods allowed for a thorough analysis of components and interactions amongst each other, the engineering approach is quick to indicate possible improvement but requires experience. The specific improvement suggestions show that it is technically and economically possible to reduce energy use by means of heat integration and to partly replace the hot and cold utilities with more sustainable ones.
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- 2018
10. Process and Economic Optimisation of a Milk Processing Plant with Solar Thermal Energy
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Bühler, Fabian, Nguyen, Tuong-Van, Elmegaard, Brian, and Modi, Anish
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- 2016
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11. Industrial Energy Mapping: THERMCYC WP6
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Huang, Baijia, Bühler, Fabian, and Holm, Fridolin Müller
- Abstract
This report contains an evaluation of the potential waste heat sources in Denmark. The evaluation is based on data from Statistics Denmark on the 15 Danish sectors (the 15 sectors are grouped in five categories that have similar consumption/production patterns). Besides the 15 sectors, the accessible heat from three natural energy sources is also included in the evaluation. The quantification of the potential waste heat is based on a number of approaches such as, professional experience within Viegand Maagøe, input from project partners, theoretical calculations, case studies, input from suppliers, input from end-users etc.It must be emphasized that the total energy consumption used in this study covers all end-users and utility companies and therefore the total energy consumption can be higher than what can be found in other statistic. By including both utility companies and end-users a double counting of net energy input can occur, if e.g. the output from the utility company is used as energy input to the end-users.The total potential for heat recovery is calculated to 212 PJ per year (excluding natural energy sources) which correspond to 13% of the net energy input for end users and producers.The large potential is firstly within the transport (36%), secondly within utility (28%), industry (23%), buildings (11%) and finally the construction sector where the potential is relatively small.The potential for waste heat in the transport sector originates from exhaust gas (high temper-ature from 200°C to 400°C), engine and charge air cooling (low temperature below 80°C).In the utility sector, 43 % of the waste heat originates from condensate from steam power plants which is accessible at a temperature of 20 °C. The remaining 57 % of the waste heat originates primarily from exhaust gas at temperatures from 120°C to 180 °C.In the industrial sector 91 % of the waste heat is accessible at temperatures below 100°C. The low temperature waste heat originates mainly from evaporation, distillation, cooling/refrigeration and space heating.In the building sector the all the waste heat is accessible at temperatures below 100°C and originate primarily from refrigeration/cooling and exhaust from boilers.The potential of waste heat in the construction sector is estimated to be relatively low due the fact the majority of the installations are temporary.The potential for utilising “waste heat” from natural resources is theoretically close to infinite, but economically unfeasible. At the stage of completing the report, there has not been sufficient information to evaluate the low temperature potential that is also economically feasible, so the focus in this report is primarily regarding the temperatures from these natural resources. Solar can supply heat at temperatures up to 100°C, geothermal energy can supply heat at temperatures up to 90 °C and air/water average around 2°C during colder seasons and 17 °C in warmer seasons.When looking across all the sectors there are two major energy sources. One of them origi-nates from cooling/refrigeration, condensate and various industrial processes all below 60 °C and the other major waste heat source comes in the form of exhaust gas from various com-bustion and heating processes.
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- 2015
12. Evaluation of energy saving potentials, costs and uncertainties in the chemical industry in Germany.
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Bühler, Fabian, Guminski, Andrej, Gruber, Anna, Nguyen, Tuong-Van, von Roon, Serafin, and Elmegaard, Brian
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ENERGY consumption , *ENERGY management , *CHEMICAL industry , *COST effectiveness , *GREENHOUSE gases - Abstract
Highlights • Analysis of possible energy savings in the German chemical industry. • Uncertainty analysis of costs and potentials of energy saving measures. • Evaluation of marginal cost curves of energy savings with uncertainties. • Determination of important model parameters using sensitivity analysis. Abstract In 2014, 19.3% of Germany’s industrial final energy consumption could be allocated to the chemical industry. Energy efficiency measures with focus on the chemical industry could thus contribute to reaching the German goal of reducing greenhouse gas emissions. To achieve this goal, energy planners and industries alike require an overview of the existing energy efficiency measures, their technical potential as well as the costs for realizing this potential. Energy efficiency opportunities are commonly presented in marginal cost curves, which rank these measures according to specific implementation costs. Existing analyses, however, do not take uncertainties in costs and potentials sufficiently into account. The aim of this paper is to create a marginal cost curve of energy efficiency measures for the chemical industry in Germany, while quantifying the uncertainties of the results and identifying the most influential input parameters. The identification of energy efficiency measures and the quantification of the associated technical potentials and costs were identified based on literature data and own assessments. Based on these findings a cost curve was created for the current technical potential. This potential was found to be 24.4 PJ per year, of which 23 PJ had negative lifetime costs. To investigate the uncertainties of these results, Monte Carlo simulations were performed to quantify the standard deviations of the implementation potential and costs. Furthermore, a sensitivity analysis, based on Morris Screening and linear regression, was conducted in order to identify the most influential model input parameters. With the applied approach, it was shown that uncertainties have a non-negligible impact on the final energy saving potential and costs, as well as the shape of marginal cost curves. The standard deviation of the energy saving potential was found to be 3.1 PJ. Furthermore, it is possible to systematically prioritise efforts in refining data. [ABSTRACT FROM AUTHOR]
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- 2018
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13. A review of solar energy based heat and power generation systems.
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Modi, Anish, Bühler, Fabian, Andreasen, Jesper Graa, and Haglind, Fredrik
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SOLAR energy , *ELECTRIC power production , *HEAT , *POWER plants , *PROFITABILITY , *ENVIRONMENTAL impact analysis - Abstract
The utilization of solar energy based technologies has attracted increased interest in recent times in order to satisfy the various energy demands of our society. This paper presents a thorough review of the open literature on solar energy based heat and power plants. In order to limit the scope of the review, only fully renewable plants with at least the production of electricity and heat/hot water for end use are considered. These include solar photovoltaic and solar thermal based plants with both concentrating and non-concentrating collectors in both solar-only and solar-hybrid configurations. The paper also presents a selection of case studies for the evaluation of solar energy based combined heat and power generation possibility in Denmark. The considered technologies for the case studies are (1) solar photovoltaic modules, (2) solar flat plate collectors, (3) a ground source heat pump, (4) a biomass burner, and (5) an organic Rankine cycle. The various cases are compared on the basis of economic profitability and environmental performance. The results from the case studies indicate that it is economically and environmentally beneficial to invest in both small and large capacity solar-biomass hybrid plants for combined heat and power production in the Nordic climatic conditions. The results also suggest that the configuration with an organic Rankine cycle with solar thermal collectors and a biomass burner is particularly attractive for large capacity plants. [ABSTRACT FROM AUTHOR]
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- 2017
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14. Energy and exergy analyses of the Danish industry sector.
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Bühler, Fabian, Nguyen, Tuong-Van, and Elmegaard, Brian
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ENERGY industries , *EXERGY , *ELECTRIC utilities , *ENERGY consumption - Abstract
A detailed analysis of the Danish industry is presented in this paper using the energy and exergy methods. For the 22 most energy-intensive process industries, which represent about 80% of the total primary energy use of the industrial sector, detailed end-use models were created and analysed with data for the years 2006 and 2012. The sectoral energy and exergy losses, as well as the exergy destruction, were further established to quantify the potential for recovering and valorising heat otherwise lost. By also considering transformation processes occurring in the utility sector, the impact of using electricity and district heat in the industry is shown. The exergy efficiencies for each process industry were found to be in the range of 12–56% in 2012. However variations in the efficiencies within the sectors for individual process industries occur, underlining the need for detailed analyses. The exergy losses amounted to 3800 TJ for the same year. Meanwhile, the complete exergy losses, including the central production of heat and power, exceeded 8700 TJ. This analysis illustrates for the case study of Denmark how waste heat recovery potentials in the industrial sectors are found, by determining the sectors losses and exergy destruction. In addition the importance of applying a system analysis is shown, which corrects the site efficiencies for electricity and district heating use. The use of 22 industries, further highlights differences amongst industries belonging to the same sector. [ABSTRACT FROM AUTHOR]
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- 2016
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15. Identification and Evaluation of Cases for Excess Heat Utilisation Using GIS.
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Bühler, Fabian, Petrović, Stefan, Ommen, Torben, Holm, Fridolin Müller, Pieper, Henrik, and Elmegaard, Brian
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HEAT , *GEOGRAPHIC information systems , *GREENHOUSE gases , *ELECTROMAGNETIC waves , *GASES - Abstract
Excess heat is present in many sectors, and its utilization could reduce the primary energy use and emission of greenhouse gases. This work presents a geographical mapping of excess heat, in which excess heat from the industry and utility sector was distributed to specific geographical locations in Denmark. Based on this mapping, a systematic approach for identifying cases for the utilization of excess heat is proposed, considering the production of district heat and process heat, as well as power generation. The technical and economic feasibility of this approach was evaluated for six cases. Special focus was placed on the challenges for the connection of excess heat sources to heat users. To account for uncertainties in the model input, different methods were applied to determine the uncertainty of the results and the most important model parameters. The results show how the spatial mapping of excess heat sources can be used to identify their utilization potentials. The identified case studies show that it can be economically feasible to connect the heat sources to the public energy network or to use the heat to generate electricity. The uncertainty analysis suggests that the results are indicative and are particularly useful for a fast evaluation, comparison and prioritization of possible matches. The excess heat temperature and obtainable energy price were identified as the most important input parameters. [ABSTRACT FROM AUTHOR]
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- 2018
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16. A method for faster application of process integration techniques in retrofit situations.
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Bergamini, Riccardo, Nguyen, Tuong-Van, Bühler, Fabian, Bellemo, Lorenzo, and Elmegaard, Brian
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PINCH analysis , *RETROFITTING , *MANUFACTURING processes , *ENERGY consumption , *INDUSTRIAL efficiency , *COMMERCIAL buildings - Abstract
Numerous process integration techniques were proved to be highly effective for identifying and estimating potential energy savings in the industry. However, they require high time and effort to collect and analyse process data. As a result, they do not constitute the common practice in the industry and opportunities for increasing the energy efficiency of industrial processes are missed. The paper presents a method, termed the " Energy-Saving Decomposition ", which is based on Process Integration techniques. It is intended for expeditiously outlining and promoting energy efficiency in the industry. Two screening tools, based on mathematical criteria and engineering experience, are employed for reducing the problem dimension before applying conventional design procedures. The first step disregards streams based on their contribution to the overall energy-saving potential, calculated utilising a novel energy-saving decomposition technique. The most promising network is then selected based on its energy-saving potential and size. The second step reduces the problem complexity further, employing economic considerations. This novel method was exemplified by application to a dairy factory: the outcomes and the method itself were compared to conventional Pinch Analysis techniques. The results showed that the developed method can simplify and reduce the time consumption of conventional Process Integration methods significantly, while identifying the most encouraging saving opportunities. The automatic algorithm allowed for reducing the problem size from 62 process streams of the existing plant to 22 streams requiring a computational time of only 135 s. The final retrofit design proposed was the same obtained with conventional Pinch Analysis, achieving a 23% reduction in the plant final energy consumption. • A novel expeditious method for process integration retrofit studies is presented. • A novel decomposition of the energy-saving potential allows a reduction in problem size. • A case study proves that the problem size is reduced from 62 to 22 streams with no loss in favourable design options. • The method can be automated and is fast to compute, requiring a few minutes. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
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