Experimental study on performance of new composite phase-change material for clean heating-Reference-Cited by-同舟云学术

Experimental study on performance of new composite phase-change material for clean heating

Published:2024-01-29 Issue: Volume: Page:1-11
ISSN:2049-1220
Container-title:Green Materials
language:en
Short-container-title:Green Materials

Author:

Zhang Qunli¹,Liu Tao²,Wang Baozhong²,Cheng Xuanrui²,Zhang Wenjing²,Yang Xiaohu³

Affiliation:

1. Beijing Municipality Key Lab of Heating, Gas Supply, Ventilating and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing, China; Beijing Energy Conservation & Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center, Beijing, China; China Architecture Design & Research Group, Beijing, China

2. Beijing Municipality Key Lab of Heating, Gas Supply, Ventilating and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing, China

3. Institute of Building Environment and Sustainability Technology, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, China

Abstract

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

Publisher

Thomas Telford Ltd.

Subject

Materials Chemistry,Polymers and Plastics,Pollution

Link

https://www.icevirtuallibrary.com/doi/pdf/10.1680/jgrma.23.00028

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