Novel composite phase change materials with enhancement of light-thermal conversion, thermal conductivity and thermal storage capacity

被引:0
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作者
Zhang, Jiasheng [1 ]
Wang, Zongming [1 ]
Li, Xiangqi [1 ,2 ]
Wu, Xiao [1 ]
机构
[1] Institute of Materials Science and Engineering, Fuzhou University, Fuzhou,350108, China
[2] Key Laboratory of Eco-materials Advanced Technology, Fuzhou University, Fuzhou,350180, China
关键词
Composite phase change materials (CPCMs) play a key role in solar energy conversion and storage. However; it is difficult to efficiently utilize solar energy due to their inherent low thermal conductivity; low light absorption and the usual competitive nature between thermal conductivity and latent heat. In this work; novel CPCMs were developed by using TiO2-TiC-C loaded expanded vermiculite (EVT) as a supporting matrix and lauric-myristic-stearic eutectic mixture (LA-MA-SA) as a PCM. The EVT was further acidized (EVTa) to enhance its PCM absorbability. Owing to the high thermal conductive and light absorption nature of TiO2-TiC-C nanocomposite; the prepared CPCMs exhibit efficient light-thermal energy conversion. The thermal conductivities of LA-MA-SA/EVT and LA-MA-SA/EVTa were 0.694 and 0.676 W/(m K); respectively. And the PCM content in LA-MA-SA/EVT and LA-MA-SA/EVTa were 64.5 and 70.6 wt%; respectively; Moreover; the feasibility of CPCM being a water heating source was experimentally confirmed. These novel CPCMs have good application prospect in low temperature solar-thermal installations; such as temperature adaptable greenhouse and water heating system. © 2019 International Solar Energy Society;
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页码:419 / 426
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