Title :
Wind tunnel experimental study on influence factors of evaporative heat transfer of porous building material
Author :
Li, Ning ; Meng, Qinglin
Author_Institution :
State Key Lab. of Subtropical Building Sci., South China Univ. of Technol., Guangzhou, China
Abstract :
With Orthogonal experimental method, an experimental study on influence factors of evaporative heat transfer of aerated concrete under a certain moisture content was carried out in the hot-humid climatic wind tunnel. The factors concerned include four meteorological factors and sample thickness. Measured from the impact of significant and persistent on evaporative heat transfer, solar radiation is the greatest influence factor, then followed by the sample thickness, the air velocity is in the third order, and the last factor is ambient air temperature, the air relative humidity and the interaction of air temperature with it have no statistically significant influence. Through the analyze we know that the most dramatically significant level of infrared power, air velocity, air temperature and sample thickness on the evaporative heat transfer were 400 w/m2, 1.5 m/s, 30°C and 100mm respectively.
Keywords :
building materials; heat transfer; moisture; porous materials; solar radiation; wind tunnels; aerated concrete; air relative humidity; air velocity; ambient air temperature; evaporative heat transfer; hot-humid climatic wind tunnel; infrared power; meteorological factor; moisture content; orthogonal experimental method; porous building material; sample thickness; solar radiation; temperature 30 C; Buildings; Heat transfer; Heating; Humidity; Surface treatment; Temperature distribution; Temperature measurement;
Conference_Titel :
Advances in Energy Engineering (ICAEE), 2010 International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-7831-6
DOI :
10.1109/ICAEE.2010.5557588
