The phase change temperature and eutectic composition of lauric acid/palmitic acid(LA-PA) system was tested by thermodynamic calculation and DTA experiment.LA-PA/coke powder composite phase change material(CPCM )was prepared.The structure and thermal properties of CPCM were studied using infrared (FT-IR),differential thermal analysis (DTA),thermal conductivity measurement,and storage/exothermic cycle test.The FT-IR results shown that the LA-PA eutectic mixture had good chemical compatibility with coke powder.The phase change temperature of CPCM was 35.4℃,and the phase change enthalpy wass 105.6J/g.The thermal conductivity of CPCM[0.411W/(m·k)] was 95.7% higher than LA-PA [0.210W/(m·k)].After 800 heat storage/release cycles,the phase change temperature and phase change enthalpy of CPCM had litter change,showing good heat storage stability,which was expected to be applied in practical projects.
Xie Wenqian, Wang Wenxin, Ding Yimin
. Study on preparation and property of LA-PA/coke power CPCM for energy storage[J]. New Chemical Materials, 2021
, 49(10)
: 138
-141
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.10.029
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