废旧发泡混凝土定型相变材料制备及热性能研究

doi:10.3969/j.issn.2097-0706.2024.03.004

综合智慧能源 ›› 2024, Vol. 46 ›› Issue (3): 29-34.doi: 10.3969/j.issn.2097-0706.2024.03.004

废旧发泡混凝土定型相变材料制备及热性能研究

孟强¹(), 田曦², 熊亚选²^,^*()

1.中国人民解放军63933部队，北京100091
2.北京建筑大学供热供燃气通风及空调工程北京市重点实验室，北京100044

收稿日期:2023-05-19 修回日期:2023-07-01 发布日期:2023-08-29 出版日期:2024-03-25
通讯作者: 熊亚选 *（1977），男，教授，博士，从事高温熔盐储热方面的研究，xiongyaxuan@bucea.edu.cn。
作者简介:孟强（1989），男，工程师，硕士，从事暖通空调相关工作，15652352383@163.com；
基金资助:
国家自然科学基金项目(62033014)

Study on preparation of shape-stable phase-change materials based on cellular concrete and their performances

MENG Qiang¹(), TIAN Xi², XIONG Yaxuan²^,^*()

1. Troop 63933 of the People's Liberation Army，Beijing 100091，China
2. Beijing Key Lab of Heating，Gas Supply，Ventilating and Air Conditioning Engineering，Beijing University of Civil Engineering and Architecture，Beijing 100044，China

Received:2023-05-19 Revised:2023-07-01 Online:2023-08-29 Published:2024-03-25
Supported by:
National Natural Science Foundation of China(62033014)

摘要/Abstract

摘要：

为规模化消纳城市固体废弃物，降低废旧发泡混凝土大量堆积对城市生态环境的破坏。提出以废旧发泡混凝土作为骨架材料，对其进行预烧结处理，以Na₂CO₃为相变材料制备定型相变材料。结果表明：废旧发泡混凝土可以负载质量分数为45%的Na₂CO₃；差示扫描量热法（DSC）测得该定型相变材料的熔化潜热为126.7 J/g；X射线衍射法（XRD）和傅里叶变换红外法（FT-IR）表明，骨架材料和相变材料之间有良好的化学相容性；激光导热分析法（LFA）测得该定型相变材料的导热系数最大为0.24 W/（m·K）。

关键词: 蓄热, 固体废弃物, 定型相变材料, 发泡混凝土, 骨架材料, 性能

Abstract:

To accommodate massive municipal solid wastes，and avoid environmental pollution resulting from serious waste concrete accumulation， a shape-stable phase-change material（SSPCM） taking waste cellular concrete（WCC） after pre-sintering as its skeleton material and using Na₂CO₃ as its phase-change material is proposed. The test results show that the sintered WCC loading with 45% Na₂CO₃ is of a melting latent heat of 126.7 J/g measured by a differential scanning calorimeter（DSC）. And according to the results of X-Ray diffraction（XRD） and Fourier transform infrared（FT-IR）， the chemical compatibility between the skeleton material and phase change material of the SSPCM is good. The maximum thermal conductivity of the SSPCM is 0.24 W/（m·K） measured by laser flash analysis（LFA）.

Key words: heat storage, solid waste, shape-stable phase-change material, cellular concrete, skeleton material, performance

中图分类号:

TK02

孟强, 田曦, 熊亚选. 废旧发泡混凝土定型相变材料制备及热性能研究[J]. 综合智慧能源, 2024, 46(3): 29-34.

MENG Qiang, TIAN Xi, XIONG Yaxuan. Study on preparation of shape-stable phase-change materials based on cellular concrete and their performances[J]. Integrated Intelligent Energy, 2024, 46(3): 29-34.

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材料	特征峰值 (cm^-1)
Na₂CO₃	3 413,3 235,2 030,1 777,1 617,1 446,880
烧结WCC	3 551,3 414,3 237,2 031,1 638, 1 618,1 384,1 023,939,904
NC3	3 551,3 414,3 236,2 032,1 637, 1 617,1 438,1 384,1 031,877
NC4	3 554,3 413,3 235,2 031,1 638,1 617, 1 438,1 384,1 031,934,896
NC5	3 552,3 413,3 235,2 031,1 638, 1 617,1 449,1 385,1 031,934

废旧发泡混凝土定型相变材料制备及热性能研究

Study on preparation of shape-stable phase-change materials based on cellular concrete and their performances

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SSPCMs	NC1	NC2	NC3	NC4	NC5
w（Na₂CO₃）/%	60	55	50	45	40
w（WCC）/%	40	45	50	55	60
w（PVA溶液）%	5	5	5	5	5

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