Integrated solar-driven high-temperature electrolysis operating with concentrated irradiation
High-temperature electrolysis for reducing HO (and CO) to H (and CO) converts concentrated solar energy into fuels and chemical feedstock. We invented an integrated reactor concept comprising a solar cavity receiver for reactant heating, a solid oxide electrolyzer (SOE) stack for water electrolysis, and concentrated photovoltaic (PV) cells for the SOE stack's electricity demand. A numerical model compared thermoneutral and endo/exothermal operation of the SOE stack. Without heat recovery, we predicted a maximum solar-to-hydrogen (STH) efficiency of 19.85% (assuming 20% PV efficiency and 20% heat losses in the solar cavity receiver) and preferentially endothermal operation. Heat recovery further improved the performance. We demonstrated a 2.5 kW (17% electrical and 83% thermal input) reactor, incorporating a commercial 16-cell Ni/YSZ/LSM SOE stack into a double-helical solar cavity receiver, with 3.33% STH efficiency (assuming 20% PV efficiency). The experimentally supported analysis indicates that endothermal operation increases the performance and predicts STH efficiencies encouraging intensified research and technology development.
Seventh Framework Programme;Seventh Framework Programme[FP7/2007–2013];
|WOS Research Area|
Chemistry ; Energy & Fuels ; Materials Science
Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
|WOS Accession No|
Cited Times [WOS]:4
|Document Type||Journal Article|
|Department||Department of Mechanical and Energy Engineering|
1.Laboratory of Renewable Energy Science and Engineering,École Polytechnique Fédérale de Lausanne,Lausanne,1015,Switzerland
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Group of Energy Materials,École Polytechnique Fédérale de Lausanne,Sion,1951,Switzerland
|First Author Affilication||Department of Mechanical and Energy Engineering|
Lin，Meng,Suter，Clemens,Diethelm，Stefan,et al. Integrated solar-driven high-temperature electrolysis operating with concentrated irradiation[J]. Joule,2022,6(9):2102-2121.
Lin，Meng,Suter，Clemens,Diethelm，Stefan,Van herle，Jan,&Haussener，Sophia.(2022).Integrated solar-driven high-temperature electrolysis operating with concentrated irradiation.Joule,6(9),2102-2121.
Lin，Meng,et al."Integrated solar-driven high-temperature electrolysis operating with concentrated irradiation".Joule 6.9(2022):2102-2121.
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