夏热冬冷地区相变屋面最佳相变温度的实验研究

doi:10.16085/j.issn.1000-6613.2022-1910

摘要/Abstract

摘要：

将相变材料（phase change material，PCM）应用到夏热冬冷地区的建筑屋顶中可以有效降低屋面内表面的温度，而PCM的相变温度影响着PCM吸热和放热的起始点，所以PCM相变温度的选择至关重要。为了寻找出适合夏热冬冷地区相变屋顶的最佳相变温度，本文以4℃为温度间隔，分别将癸酸（31℃）、70%月桂酸+30%肉豆蔻（35℃）、82%月桂酸+18%硬脂酸（39℃）、月桂酸（43℃）、十六醇（48℃）填充到铝箔袋中进行封装，再用玻璃纤维隔热板将他们分割成六块大小相同的小格子，将PCM屋面和高反射率涂料结合，形成新型的高反射率PCM屋面。对6种屋面的热防护性能进行了为期3天（8月16日~8月19日）的连续监测。结果表明：当相变温度为35~39℃时屋顶隔热效果最好，相变屋顶的最大减温率（MTR）、衰减系数（DF）降低率和时滞系数（TL）分别17.64℃、16.4%和167min。

关键词: 相变材料, 相变温度, 夏热冬冷地区, 相变屋面

Abstract:

The application of phase change material (PCM) to building roofs in hot summer and cold winter areas can effectively reduce the temperature of the inner surface of the roof, and the phase change temperature of PCM affects the starting point of PCM heat absorption and release, so the selection of PCM phase change temperature is crucial. In order to find out the best phase change temperature for the phase change roof in hot summer and cold winter areas, this paper, with 4℃ as the temperature interval, respectively, filled decanoic acid (31℃), 70% lauric acid+30% nutmeg (35℃), 82% lauric acid+18% stearic acid (39℃), lauric acid (43℃) and hexadecanol (48℃) into aluminum foil bags for packaging, and then divided them into six small lattices of the same size with glass fiber insulation board. PCM roof and high reflectivity coating were combined to form a new type of high reflectivity PCM roof. The thermal protection performance of 6 kinds of roofs was continuously monitored for 3 days (August 16th—August 19th). The results showed that the roof insulation effect was the best when the phase change temperature was 35~39℃. The maximum temperature reduction rate (MTR), attenuation coefficient (DF) reduction rate and time delay coefficient (TL) of the phase change roof were 17.64℃, 16.4% and 167min, respectively.

Key words: phase change material, phase transition temperature, hot summer and cold winter area, phase change roof

中图分类号:

TU55⁺1

时雨, 赵运超, 樊智轩, 蒋达华. 夏热冬冷地区相变屋面最佳相变温度的实验研究[J]. 化工进展, 2023, 42(9): 4828-4836.

SHI Yu, ZHAO Yunchao, FAN Zhixuan, JIANG Dahua. Experimental study on the optimum phase change temperature of phase change roofs in hot summer and cold winter areas[J]. Chemical Industry and Engineering Progress, 2023, 42(9): 4828-4836.

图/表 20

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材料	厚度/m	相变温度/K	密度/kg·m^-2	潜热/J·g^-1	热导率/W·m^-1·K^-1
彩钢板	0.03	—	7850.00	—	48.00
铝合金板	0.02	—	2730.00	—	238.00
反射隔热涂料	0.002	—	15.00	—	—
XPS隔热板	0.02	—	35.00	—	0.03
癸酸	0.02	304.15	885.80	141.83	0.30
70% 月桂酸+30% 肉豆蔻	0.02	308.15	—	166.18	—
82% 月桂酸+18% 硬脂酸	0.02	312.15	—	189.50	—
月桂酸	0.02	316.15	883.00	166.67	0.21
十六醇	0.02	321.15	817.60	241.00	0.20

材料	厚度/m	相变温度/K	密度/kg·m^-2	潜热/J·g^-1	热导率/W·m^-1·K^-1
彩钢板	0.03	—	7850.00	—	48.00
铝合金板	0.02	—	2730.00	—	238.00
反射隔热涂料	0.002	—	15.00	—	—
XPS隔热板	0.02	—	35.00	—	0.03
癸酸	0.02	304.15	885.80	141.83	0.30
70% 月桂酸+30% 肉豆蔻	0.02	308.15	—	166.18	—
82% 月桂酸+18% 硬脂酸	0.02	312.15	—	189.50	—
月桂酸	0.02	316.15	883.00	166.67	0.21
十六醇	0.02	321.15	817.60	241.00	0.20

名称	型号	规格	厂家
电子天平	JA2003	精度±0.001g	上海良平仪器仪表有限公司
磁力搅拌器	DF-101S	—	巩义市予华仪器有限责任公司
恒温恒湿培养箱	HWS-250B	—	北京市恒诺利兴科技有限公司
多路巡回检测仪	THJ082K	±0.5%FS	余姚市腾辉温控仪表厂
Agilent数据采集仪	34972A	精度±0.001℃	KEYSIGHT

名称	型号	规格	厂家
电子天平	JA2003	精度±0.001g	上海良平仪器仪表有限公司
磁力搅拌器	DF-101S	—	巩义市予华仪器有限责任公司
恒温恒湿培养箱	HWS-250B	—	北京市恒诺利兴科技有限公司
多路巡回检测仪	THJ082K	±0.5%FS	余姚市腾辉温控仪表厂
Agilent数据采集仪	34972A	精度±0.001℃	KEYSIGHT

温度	1号	2号	3号	4号	5号	6号
最低温度	25.42	25.23	25.59	25.72	25.84	25.26
最高温度	55.54	53.12	52.47	55.21	53.73	53.06
平均温度	34.19	33.56	33.65	34.57	34.38	33.84