期刊
APPLIED THERMAL ENGINEERING
卷 136, 期 -, 页码 701-707出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2018.03.053
关键词
Composite phase change material; CH3COONa center dot 3H(2)O; Thermal energy storage; Light-to-thermal conversion
资金
- Natural Science Foundation of Guangdong Province (China) [2016A030313475]
- Dongguan Science and Technology Project, (China) [201521510201]
- Project of Science and Technology of Guangdong Province, (China) [2015B010135009]
- Applied Science and Technology Projects of Guangdong Province, (China) [20168020243008]
- EPSRC [EP/P005667/1] Funding Source: UKRI
Latent thermal energy storage using phase change material (PCM) is an effective way to store and transport thermal energy. In this work, a shape-stabilized light-to-thermal conversion composite PCM containing 72.5 wt% CH3COONa center dot 3H(2)O (SAT), 0.4 wt% Na2HPO4, 17.1 wt% expanded graphite (EG) and 10 wt% CuS was prepared using a physical blending and impregnation method. Experimental results showed that Na2HPO4 was an effective nucleating agent, greatly promoting SAT crystallization. EG as supporting material played an important role in preventing melting PCM from leakage. The addition of CuS can increase the light-to-thermal conversion efficiency from 66.9% to 94.1%. The resultant composite PCM had high phase change enthalpy of 194.8 J/g, low supercooling temperature and good thermal cycling performance. After 150 thermal cycles, the melting enthalpy and light-to-thermal conversion efficiency were decreased by only 5.9% and 2.6%, respectively. This material could be suggested as a potential candidate for storage of thermal energy in solar energy utilization.
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