Thermal performance of double-layer black tile roof in winter. (September 2017)

• Record Type: Journal Article
• Authors: Shen, Lili; Zhao, Qun; Li, Zhengrong; Zhao, Jingpeng
• Is Part Of: Energy procedia. Volume 122(2017)
• Page Start: 247
• Page End: 252
• Publication Date: 2017-09
• Subjects: Double construction -- Black tile roof -- Ventilation -- Thermal performance -- Winter; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.07.463
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: Black tile roofs (BTR) are a traditional roof construction in Southern China. As heat insulation and waterproofing are insufficient in single-layer roofs, more climate-adapted double-layer tile roofs are used to replace them. Although providing remarkable heat insulation in summer, winter thermal performances of the double-layer BTR are unclear. Experimental comparisons of thermal performances of single-layer and double-layer BTRs showed that the indoor temperature of the single-layer BTR was 5°C higher than that of the double-layer BTR in the daytime, but 2℃ lower in the night-time. Compared with the single-layer BTR, the heat gain of the double-layer BTR was reduced by 85%, and a 55% heat loss reduction was achieved. The overall thermal resistance of the double-layer BTR was ten times higher. When considering the effects of ventilation in the air channel, the unventilated double-layer BTR reduced heat loss during the night-time, but there was no obvious difference in heat gain.