作者: Mohamad Aramesh , Bahman Shabani
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摘要: This study presents a novel self-storing design of evacuated tube solar collector (ETSC), in which the collector tubes are filled with a phase change material-metal foam (PCM-MF) composite. The performance of this design in storage and transfer of the collected solar thermal energy is experimentally studied and compared with similar designs based on pure PCM and PCM-fin composite. Due to physical limitations, the design with PCM-MF composite contains 8 % and 6 % less mass of PCM, i.e., storage material, compared to the designs with pure PCM and PCM-fin composite, respectively. In the same order, it reaches 35 % and 8 % higher maximum output temperature and stores 10 % and 5 % more amount of thermal energy. During the storage phase of the experiments, the overall thermal efficiencies achieved by the ETSCs with pure PCM, PCM-fin composite, and PCM-metal foam composite are 52 %, 54 %, and …