The annual-hydrogen-yield-climatic-response ratio: evaluating the real-life performance of integrated solar water splitting devices
4062 4074 Integrated solar water splitting devices that produce hydrogen without the use of power inverters operate outdoors and are hence exposed to varying weather conditions. As a result, they might sometimes work at non-optimal operation points below or above the maximum power point of the photo...
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ftfrauneprints:oai:publica.fraunhofer.de:publica/439668 2023-07-16T03:54:38+02:00 The annual-hydrogen-yield-climatic-response ratio: evaluating the real-life performance of integrated solar water splitting devices Köhlbach, Moritz Höhn, Oliver Rehfeld, Kira Finkbeiner, Manuel Barry, James May, Matthias M. 2022 https://publica.fraunhofer.de/handle/publica/439668 https://doi.org/10.1039/D2SE00561A en eng Sustainable energy & fuels 2398-4902 doi:10.1039/D2SE00561A https://publica.fraunhofer.de/handle/publica/439668 journal article 2022 ftfrauneprints https://doi.org/10.1039/D2SE00561A 2023-06-25T23:43:06Z 4062 4074 Integrated solar water splitting devices that produce hydrogen without the use of power inverters operate outdoors and are hence exposed to varying weather conditions. As a result, they might sometimes work at non-optimal operation points below or above the maximum power point of the photovoltaic component, which would directly translate into efficiency losses. Up until now, however, no common parameter describing and quantifying this and other real-life operating related losses (e.g. spectral mismatch) exists in the community. Therefore, the annual-hydrogen-yield-climatic-response (AHYCR) ratio is introduced as a figure of merit to evaluate the outdoor performance of integrated solar water splitting devices. This value is defined as the ratio between the real annual hydrogen yield and the theoretical yield assuming the solar-to-hydrogen device efficiency at standard conditions. This parameter is derived for an exemplary system based on state-of-the-art AlGaAs//Si dual-junction solar cells and an anion exchange membrane electrolyzer using hourly resolved climate data from a location in southern California and from reanalysis data of Antarctica. Moreover, the advantage of devices operating at low current densities over completely decoupled PV-electrolysis is discussed. This work will help to evaluate, compare and optimize the climatic response of solar water splitting devices in different climate zones. 6 17 Article in Journal/Newspaper Antarc* Antarctica Publikationsdatenbank der Fraunhofer-Gesellschaft Sustainable Energy & Fuels 6 17 4062 4074 |
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Publikationsdatenbank der Fraunhofer-Gesellschaft |
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English |
description |
4062 4074 Integrated solar water splitting devices that produce hydrogen without the use of power inverters operate outdoors and are hence exposed to varying weather conditions. As a result, they might sometimes work at non-optimal operation points below or above the maximum power point of the photovoltaic component, which would directly translate into efficiency losses. Up until now, however, no common parameter describing and quantifying this and other real-life operating related losses (e.g. spectral mismatch) exists in the community. Therefore, the annual-hydrogen-yield-climatic-response (AHYCR) ratio is introduced as a figure of merit to evaluate the outdoor performance of integrated solar water splitting devices. This value is defined as the ratio between the real annual hydrogen yield and the theoretical yield assuming the solar-to-hydrogen device efficiency at standard conditions. This parameter is derived for an exemplary system based on state-of-the-art AlGaAs//Si dual-junction solar cells and an anion exchange membrane electrolyzer using hourly resolved climate data from a location in southern California and from reanalysis data of Antarctica. Moreover, the advantage of devices operating at low current densities over completely decoupled PV-electrolysis is discussed. This work will help to evaluate, compare and optimize the climatic response of solar water splitting devices in different climate zones. 6 17 |
format |
Article in Journal/Newspaper |
author |
Köhlbach, Moritz Höhn, Oliver Rehfeld, Kira Finkbeiner, Manuel Barry, James May, Matthias M. |
spellingShingle |
Köhlbach, Moritz Höhn, Oliver Rehfeld, Kira Finkbeiner, Manuel Barry, James May, Matthias M. The annual-hydrogen-yield-climatic-response ratio: evaluating the real-life performance of integrated solar water splitting devices |
author_facet |
Köhlbach, Moritz Höhn, Oliver Rehfeld, Kira Finkbeiner, Manuel Barry, James May, Matthias M. |
author_sort |
Köhlbach, Moritz |
title |
The annual-hydrogen-yield-climatic-response ratio: evaluating the real-life performance of integrated solar water splitting devices |
title_short |
The annual-hydrogen-yield-climatic-response ratio: evaluating the real-life performance of integrated solar water splitting devices |
title_full |
The annual-hydrogen-yield-climatic-response ratio: evaluating the real-life performance of integrated solar water splitting devices |
title_fullStr |
The annual-hydrogen-yield-climatic-response ratio: evaluating the real-life performance of integrated solar water splitting devices |
title_full_unstemmed |
The annual-hydrogen-yield-climatic-response ratio: evaluating the real-life performance of integrated solar water splitting devices |
title_sort |
annual-hydrogen-yield-climatic-response ratio: evaluating the real-life performance of integrated solar water splitting devices |
publishDate |
2022 |
url |
https://publica.fraunhofer.de/handle/publica/439668 https://doi.org/10.1039/D2SE00561A |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Sustainable energy & fuels 2398-4902 doi:10.1039/D2SE00561A https://publica.fraunhofer.de/handle/publica/439668 |
op_doi |
https://doi.org/10.1039/D2SE00561A |
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Sustainable Energy & Fuels |
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6 |
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17 |
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4062 |
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4074 |
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1771540894512578560 |