Preparation and properties of phase change energy storage composite with microcapsules and desulfurized gypsum

被引：0
|
作者：
Liu, Fengli [1 ]
Bai, Jianxia [1 ]
Liu, Junhua [2 ]
Li, Qiaoli [1 ]
机构：
[1] Laboratory for Recycled and Functional Building Materials, Henan University, Kaifeng,475004, China
[2] School of Civil Engineering and Architecture, Kaifeng University, Kaifeng,475004, China
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2024年 / 41卷 / 08期
关键词：
Micro-encapsulated phase change materials (MPCM) was used as energy storage elements and combined with desulfurized gypsum. Effects of MPCM on the mechanical properties; thermal properties and thermal cycle stability of desulfurized gypsum-based composites were investigated. Results show that the latent heat energy storage capacity of MPCM can not only adjust the hydration temperature rise of the slurry; but also gave the composite the power to store energy and regulate temperature. However; the addition of MPCM has a negative effect on the strength of the composite. When the MPCM content is 50wt%; the comprehensive properties of the composite are better. At this time; the phase transition temperature and enthalpy of the composite are 24.51℃ and 28.47 J·g−1; respectively. The temperature peak during heat storage stage and the time to reach the peak temperature are reduced and delayed by 6.4℃ and 980 s; when compared with pure gypsum. The effect of heat storage and temperature control is obvious. The thermal conductivity of the composite is 0.451 W·(m·K)−1 and its 28 days compressive strength is 25.05 MPa. The mass loss rate; phase change temperature change rate and phase change enthalpy change rate of 250 cold hot cycles are 0.67%; 0.08%; and; 2.3%; respectively; and the thermal cycle stability is good. Phase change energy storage gypsum has good mechanical properties; thermal properties and thermal cycle stability; and has broad application prospects in building envelope structure. © 2024 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved;
D O I：
10.13801/j.cnki.fhclxb.20231214.003
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页码：4171 / 4179
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