Experimental study on the performance of a novel composite phase change energy storage material for clean heating

IF 1.8 4区材料科学 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Green Materials Pub Date : 2023-11-23 DOI:10.1680/jgrma.23.00028

Qunli Zhang, Tao Liu, Baozhong Wang, Xuanrui Cheng, Wenjing Zhang, Xiaohu Yang

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引用次数: 0

Abstract

To achieve green and clean energy heating, improve the performance of phase change material energy storage heating systems (PCMEHS), a novel magnesium chloride hexahydrate/expanded graphite/calcium hydroxide composite phase change material (CPCM) was developed. The thermal properties and phase separation characteristics of the CPCM were experimentally characterized. The results show that MgCl_2·6H₂O/EG CPCM composed of 7.5% EG has good thermal storage performance without affecting the phase change performance. On this basis, the nucleating agent calcium hydroxide was added to further eliminate the supercooling of the material. The thermophysical properties of the ternary CPCM were tested, and the samples were characterized and analyzed from the microstructure. The thermal conductivity of the ternary CPCM is 2.825 W·m⁻¹·K⁻¹, about 4.66 times that of pure MgCl₂·6H₂O (0.606 W·m⁻¹·K⁻¹), and the supercooling is 0°C. The results of these thermal characteristics show that MgCl₂·6H₂O/EG/Ca(OH)₂ CPCM has great application potential in clean and green energy heating system.

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一种新型清洁加热复合相变储能材料性能的实验研究

为实现绿色清洁能源供热，提高相变材料储能供热系统(PCMEHS)的性能，研制了一种新型六水氯化镁/膨胀石墨/氢氧化钙复合相变材料(CPCM)。实验表征了CPCM的热性能和相分离特性。结果表明，7.5% EG组成的MgCl2·6H2O/EG CPCM具有良好的储热性能，且不影响相变性能。在此基础上，加入成核剂氢氧化钙，进一步消除材料过冷现象。测试了三元CPCM的热物理性能，并从微观结构上对样品进行了表征和分析。三元CPCM的导热系数为2.825 W·m−1·K−1，是纯MgCl2·6H2O (0.606 W·m−1·K−1)的4.66倍，过冷温度为0℃。这些热特性结果表明，MgCl2·6H2O/EG/Ca(OH)2 CPCM在清洁和绿色能源供暖系统中具有很大的应用潜力。

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来源期刊

Green Materials Environmental Science-Pollution

CiteScore

3.50

自引率

15.80%

发文量

期刊介绍： The focus of Green Materials relates to polymers and materials, with an emphasis on reducing the use of hazardous substances in the design, manufacture and application of products.