Photo-to-thermal conversion and energy storage of polyethylene glycol/copper sulfide composite PCMs

被引：46
作者：
Dong, Yanfang [1 ]
Liu, Hao [1 ]
Zhang, Nan [1 ]
Zhou, Jinzhi [1 ]
Pan, Xiyu [1 ]
机构：
[1] Southwest Jiaotong Univ, Sch Mech Engn, Chengdu 610031, Peoples R China
来源：
SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2022年 / 238卷
关键词：
Polyethylene glycol; Copper sulfide; Suspension stability; Latent heat thermal energy storage; Photo-to-thermal conversion; PHASE-CHANGE MATERIALS; PERFORMANCE;
D O I：
10.1016/j.solmat.2022.111583
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
In order to improve the energy storage performance of polyethylene glycol (PEG), copper sulfide (CuS) was introduced into PEG to endow the function of photo-to-thermal conversion. A series of novel PEG/CuS composite phase change materials (PCMs) were prepared by melt blending method with polyethylene pyrrolidone (PVP) employed as a stabilizer. Results of the dispersion stability experiment and 100 thermal cycles test showed that 2 wt% PVP can effectively improve the stability of PEG/PVP/CuS composite PCMs. And the CuS nanoparticles were uniformly dispersed in the PEG through physical action with the help of PVP. DSC results showed that the melting enthalpy of PEG/PVP/CuS composite PCM is as high as 171.8 J/g, 164.0 J/g, and 156.2 J/g when the content of CuS is 2 wt%, 6 wt%, and 10 wt%, respectively. Thermal cycling test and TGA results demonstrated that PEG/PVP/CuS composite PCMs have excellent reliability and stability. The photo-absorption property of PEG/PVP/CuS composite PCM increases to the range of 0.44-0.852, 0.938-1.533, 1.335-2.462 respectively within the addition of 2 wt%, 6 wt%, 10 wt% CuS in the radiation range of 300-900 nm. And the photo-tothermal conversion efficiency of PEG/PVP/CuS composite PCMs was tested up to 87.36%. Therefore, the prepared PEG/PVP/CuS composite PCMs show remarkable potential in solar thermal utilization applications.
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页数：10
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