科研之友
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摘要
In the contemporary era, phase change material (PCM) is used in solar water heaters to store the extra amount of heat energy available during the full sunshine hours. The primary purpose of this study is to examine the performance of PCM-incorporated thermosyphon solar water heating system using flat plate collector as a heat source. In this study, a cylindrical aluminium PCM tank acts as a thermal energy storage unit. It is employed in the top portion of the insulated storage tank containing water. Paraffin wax is used as a PCM. Water is used as heat transfer fluid (HTF) to transfer heat from flat plate collector to storage tank. The charging and discharging experiments are carried out on clear days with and without PCM under actual operating conditions. The significance of time wide variation of HTF and PCM temperatures during experiments are discussed in detail and the performance parameters, such as charging energy efficiency, stratification number, and thermal efficiency, were also studied. The simulation of the discharging experiments is done in Computational Fluid Dynamic for validation purpose. It is shown from the experiments that the PCM improves the performance of the system by bettering stratification number, charging energy efficiency, and thermal efficiency of storage tank.
- 出版日期2015
