An assessment of mixed type PCM-gypsum and shape-stabilized PCM plates in a building for passive solar heating

作者：Zhou, Guobing; Zhang, Yinping^*; Wang, Xin; Lin, Kunping; Xiao, Wei

来源：Solar Energy, 2007, 81(11): 1351-1360.

DOI：10.1016/j.solener.2007.01.014

• shape-stabilized PCM
• energy storage
• thermal performance
• direct gain passive solar building
• simulation

Thermal performance of two phase change material (PCM) composites, mixed type PCM-gypsum and shape-stabilized PCM plates, has been numerically evaluated in a passive solar building in Beijing with an enthalpy model. Effects of the melting temperature and phase transition zone of the PCM are analyzed and a comparison between the two types of PCM composites is performed. The results show that: (1) for the present conditions, the optimal melting temperature is about 21 degrees C (2) PCM composites with a narrow phase transition zone provide better thermal performance; (3) both mixed type PCM-gypsum and shape-stabilized PCM plates effectively shave the indoor temperature swing by 46% and 56%, respectively; (4) the shape-stabilized phase change material (SSPCM) plates respond more rapidly than the mixed type PCM-gypsum and prove to be thermally more effective in terms of utilizing the latent heat.

• 出版日期2007
• 单位清华大学