Chemical and thermal performance analysis of a solar thermochemical reactor for hydrogen production via two-step WS cycle
Sharma J.P. Kumar R. Ahmadi M.H. Mukhtar A. Yasir A.S.H.M. Sharifpur M. Ongar B. Yegzekova A.
November 2023Elsevier Ltd
Energy Reports
2023#1099 - 113 pp.
Ceria-based H2O/CO2-splitting solar-driven thermochemical cycle produces hydrogen or syngas. Thermal optimization of solar thermochemical reactor (STCR) improves the solar-to-fuel conversion efficiency. This research presents two conceptual designs and thermal modelling of RPC-ceria-based STCR cavities to attain the optimal operating conditions for CeO2 reduction step. Presented hybrid geometries consisting of cylindrical–hemispherical and conical frustum–hemispherical structures. The focal point was positioned at x = 0, -10 mm, and -20 mm from the aperture to examine the flux distribution in both solar reactor configurations. Case-1 with 2 milliradian S.E (slope error) yields a 27% greater solar flux than case-1 with 4 milliradians S.E, despite the 4 milliradian S.E produces an elevated temperature in the reactor cavity. The mean temperature in the reactive porous region was most significant for case-2 (x = -10 mm) with 4 mrad S.E for model-2, reaching 1966 K and 2008 K radially and axially, respectively. In case-2 (x = -10 mm) for 4 mrad S.E, model-1 attained 1720 K. The efficiency analysis shows that the highest conversion efficiency value was obtained to be 7.95% for case-1 with 4 milliradian S.E.
Porous media , Solar fuels , SolTrace , STCR modelling , Thermal analysis , WS process
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School of Mechanical Engineering, Lovely Professional University, Phagwara-144411, Punjab, India
Faculty of Mechanical Engineering, Shahrood University of Technology, Shahrood, Iran
Institute of Sustainable Energy, Putrajaya Campus, Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, Kajang, 43000, Malaysia
Rabdan Academy, 65, Al Inshirah, Al Saadah, Abu Dhabi, 22401, PO Box: 114646, Abu Dhabi, United Arab Emirates
Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria, 0002, South Africa
Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
Department of Power Engineering, Satbayev University, 22a Satpaev str., Almaty, 050013, Kazakhstan
Department of Power Engineering, Logistics and Transport Academy, 97 Shevchenko str, Almaty, 050012, Kazakhstan
School of Mechanical Engineering
Faculty of Mechanical Engineering
Institute of Sustainable Energy
Rabdan Academy
Department of Mechanical and Aeronautical Engineering
Department of Medical Research
Department of Power Engineering
Department of Power Engineering
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