Experimental study on the performance of solar Rankine system using supercritical CO2 |
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Authors: | Xin-Rong Zhang Hiroshi Yamaguchi Daisuke Uneno |
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Affiliation: | aDepartment of Mechanical Engineering, Doshisha University, Kyoto 630-0321, Japan;bCollege of Engineering, Peking University, Beijing 100871, China |
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Abstract: | An experimental study is carried out to investigate the performance of a solar Rankine system using supercritical CO2 as a working fluid. The testing machine of the solar Rankine system consists of an evacuated solar collector, a pressure relief valve, heat exchangers and CO2 feed pump, etc. The solar energy powered system can provide electricity output as well as heat supply/refrigeration, etc. The system performance is evaluated based on daily, monthly and yearly experiment data. The results obtained show that heat collection efficiency for the CO2-based solar collector is measured at 65.0–70.0%. The power generation efficiency is found at 8.78–9.45%, which is higher than the value 8.20% of a solar cell. The result presents a potential future for the solar powered CO2 Rankine system to be used as distributed energy supply system for buildings or others. |
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Keywords: | Solar energy Supercritical CO2 Rankine cycle Distributed energy supply system |
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