Study on Hollow Brick Wall’s Surface Temperature with Infrared Thermal Imaging Method
TANG Ming-fang, YIN Yi-hua
Faculty of Architecture and Urban Planning, Chongqing University，Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education，Chongqing University, Chongqing 400045, China
Abstract：To address the characteristic of uneven surface temperature of hollow brick wall, the present research adopts soft wares of both ThermaCAM P20 and ThermaCAM Reporter to test the application of infrared thermal image technique in measuring surface temperature of hollow brick wall, and further analyzes the thermal characteristics of hollow brick wall, and building material’s impact on surface temperature distribution including hollow brick, masonry mortar, and so on. The research selects the construction site of a three-story-high residential, carries out the heat transfer experiment, and further examines the exterior wall constructed by 3 different hollow bricks including sintering shale hollow brick, masonry mortar and brick masonry. Infrared thermal image maps are collected, including 3 kinds of sintering shale hollow brick walls under indoor heating in winter; and temperature data of wall surface, and uniformity and frequency distribution are also collected for comparative analysis between 2 hollow bricks and 2 kinds of mortar masonry. The results show that improving heat preservation of hollow brick and masonry mortar can effectively improve inner wall surface temperature and indoor thermal environment; non-uniformity of surface temperature decreases from 0.6 to 0.4 ℃, and surface temperature frequency distribution changes from the asymmetric distribution into a normal distribution under the condition that energy-saving sintering shale hollow brick wall is constructed by thermal mortar replacing cement mortar masonry; frequency of average temperature increases as uniformity of surface temperature increases. This research provides a certain basis for promotion and optimization of hollow brick wall’s thermal function.
[1] LI Lin-ping, WU Zhi-gen, LI Zeng-yao, et al(李临平, 吴志根, 李增耀, 等). Journal of Engineering Thermophysics(工程热物理学报), 2008, 29(5): 845. [2] LI Guo-hua, WU Li-xin, WU Miao(李国华，吴立新，吴 淼). Infrared and Laser Engineering(红外与激光工程), 2004, 33(3): 227. [3] Shen X M, Xu J W. Advanced Materials Research, 2012, 512: 2899. [4] Mahaboonpachai T, Kuromiya Y, Matsumoto T. Construction and Building Materials, 2008, 22(9): 2001. [5] Edis E, Flores-Colen I, de Brito J. Journal of Performance of Constructed Facilities, 2013, 27(6): 737. [6] HUANG Xin, WANG Xiao-yan(黄 新，王晓燕). Infrared(红外)，2012, 33(6)：38. [7] FENG Li-qiang, WANG Huan-xiang, YAN Da-wei, et al(冯力强, 王欢祥, 晏大伟, 等). Journal of Civil, Architectural & Environmental Engineering(土木建筑与环境工程), 2014, 36(2)：57. [8] Paris A Fokaides, Soteris A Kalogirou. Applied Energy, 2011, 88: 4358. [9] Lehmann B, Ghazi K Wakili, Frank Th, et al. Applied Energy, 2013, 110: 29. [10] Albatici R, Tonelli A M. Energy and Building, 2011，42: 2177.
