SET Proceedings 2978-4387 Caravel Press 10.65582/set.2005.087 2005.087 Application of Phase Change Material in Solar Assisted Ground-source Heat Pump System ZhengMaoyu WangFang LiZhongjian LeiBangwei Civil Environment Engineering Academy, Harbin Institute of Technology, Harbin, China Harbin University of Science and Technology, Harbin, China The Third Harbour Engineering Investigation & Design Institute, Shanghai, China 23092005 4 1 978-7-112-07718-2 390 393 23 September 2005 © 2005 Copyright WSSET 2005

Aimed at the heat supply's fluctuation of solar assisted ground-source heat pump (SAGHP) system, an energy storage tank is installed. In order to adjust the large discrepancy between the supply and the demand of heat and meanwhile to enhance the stability of the system, phase change material (PCM) that has the characteristic of storing and emitting heat is used. Studying operation mode and conversion conditions of the SAGHP system combined with a latent heat energy storage tank (LHEST), the system operates at an optimised running condition. The system's overall average heating coefficient of performance (COP) is enhanced and almost gets to 6.5.

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