Experimental study on the optimum phase change temperature of phase change roofs in hot summer and cold winter areas

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

Abstract

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

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

CLC Number:

TU55⁺1

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.

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.

Figures/Tables 20

References 22

1	IEA (International Energy Agency), Environment Programme UN. 2019 Global Status Report for Buildings and Construction: towards Zero-Emission, Efficient and Resilient Buildings and Construction Sector[R]. 2019.
2	赵东来, 胡春雨, 柏德胜, 等. 我国建筑节能技术现状与发展趋势[J]. 建筑节能, 2015, 43(3): 116-121.
	ZHAO Donglai, HU Chunyu, BAI Desheng, et al. Building energy conservation technology status and development trend in China[J]. Building Energy Efficiency, 2015, 43(3): 116-121.
3	YAO Chengqiang, KONG Xiangfei, LI Yantong, et al. Numerical and experimental research of cold storage for a novel expanded perlite-based shape-stabilized phase change material wallboard used in building[J]. Energy Conversion and Management, 2018, 155: 20-31.
4	MENG Erlin, YU Hang, ZHOU Bo. Study of the thermal behavior of the composite phase change material (PCM) room in summer and winter[J]. Applied Thermal Engineering, 2017, 126: 212-225.
5	VIJAYKUMAR K C K, SRINIVASAN P S S, DHANDAPANI S. A performance of hollow clay tile (HCT) laid reinforced cement concrete (RCC) roof for tropical summer climates[J]. Energy and Buildings, 2007, 39(8): 886-892.
6	LI Dong, ZHENG Yumeng, LIU Changyu, et al. Numerical analysis on thermal performance of roof contained PCM of a single residential building[J]. Energy Conversion and Management, 2015, 100: 147-156.
7	YU Jinghua, YANG Qingchen, YE Hong, et al. Thermal performance evaluation and optimal design of building roof with outer-layer shape-stabilized PCM[J]. Renewable Energy, 2020, 145: 2538-2549.
8	YAN Quanying. An applied research on phase-change materical building mass[C]. Proceedings of the 3th International Symposium on Heat Transfer and Energy Conservation. Guangzhou:South China University of Technology Press, 2004.
9	杨清晨, 于靖华, 陶俊威, 等. 相变屋面隔热性能影响因素分析[J]. 建筑科学, 2019, 35(4): 15-21.
	YANG Qingchen, YU Jinghua, TAO Junwei, et al. Analysis of factors affecting thermal insulation performance of phase change roof[J]. Building Science, 2019, 35(4): 15-21.
10	SYNNEFA A, SANTAMOURIS M, AKBARI H. Estimating the effect of using cool coatings on energy loads and thermal comfort in residential buildings in various climatic conditions[J]. Energy and Buildings, 2007, 39(11): 1167-1174.
11	TRIANO-JUÁREZ J, MACIAS-MELO E V, HERNÁNDEZ-PÉREZ I, et al. Thermal behavior of a phase change material in a building roof with and without reflective coating in a warm humid zone[J]. Journal of Building Engineering, 2020, 32: 101648.
12	SAFFARI Mohammad, PISELLI Cristina, DE GRACIA Alvaro, et al. Thermal stress reduction in cool roof membranes using phase change materials (PCM)[J]. Energy and Buildings, 2018, 158: 1097-1105.
13	MENG Erlin, WANG Junqi, YU Hang, et al. Experimental study of the thermal protection performance of the high reflectivity-phase change material (PCM) roof in summer[J]. Building and Environment, 2019, 164: 106381.
14	HASAN Mushtaq I, BASHER Hadi O, SHDHAN Ahmed O. Experimental investigation of phase change materials for insulation of residential buildings[J]. Sustainable Cities and Society, 2018, 36: 42-58.
15	杨天润, 孙锲, WENNERSTEN Ronald, 等. 相变蓄冷材料的研究进展[J]. 工程热物理学报, 2018, 39(3): 567-573.
	YANG Tianrun, SUN Qie, WENNERSTEN Ronald, et al. Review of phase change materials for cold thermal energy storage[J]. Journal of Engineering Thermophysics, 2018, 39(3): 567-573.
16	冷光辉, 蓝志鹏, 葛志伟, 等. 储热材料研究进展[J]. 储能科学与技术, 2015, 4(2): 119-130.
	LENG Guanghui, LAN Zhipeng, GE Zhiwei, et al. Recent progress in thermal energy storage materials[J]. Energy Storage Science and Technology, 2015, 4(2): 119-130.
17	FAN Zhixuan, ZHAO Yunchao, LIU Xuying, et al. Thermal properties and reliabilities of lauric acid-based binary eutectic fatty acid as a phase change material for building energy conservation[J]. ACS Omega, 2022, 7(18): 16097-16108.
18	Qudama AL-YASIRI, Márta SZABÓ. Experimental evaluation of the optimal position of a macroencapsulated phase change material incorporated composite roof under hot climate conditions[J]. Sustainable Energy Technologies and Assessments, 2021, 45: 101121.
19	SUN Xiaoqin, FAN Siyuan, CHU Youhong, et al. Annual thermal evaluation of lightweight building envelopes containing phase change materials in Changsha[C]//Environmental Science and Engineering. Singapore: Springer, 2020: 157-166.
20	KENZHEKHANOV Sultan, MEMON Shazim ALI, ADILKHANOVA Indira. Quantitative evaluation of thermal performance and energy saving potential of the building integrated with PCM in a subarctic climate[J]. Energy, 2020, 192: 116607.
21	ASAN H. Numerical computation of time lags and decrement factors for different building materials[J]. Building and Environment, 2006, 41(5): 615-620.
22	MAZZEO Domenico, KONTOLEON Karolos J. The role of inclination and orientation of different building roof typologies on indoor and outdoor environment thermal comfort in Italy and Greece[J]. Sustainable Cities and Society, 2020, 60: 102111.

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