复合砌块热阻的简化计算.docxVIP

复合砌块热阻的简化计算徐红仙1 ，薛群虎1 ，李寿 复合砌块热阻的简化计算 徐红仙1 ，薛群虎1 ，李寿德2 ，韩志明3 ( 1． 西安建筑科技大学材料科学与工程学院，西部建筑科技国家重点实验室( 筹) ，西安 710055; 2． 西安墙体材料研究设计院，西安 710061; 3． 上海理工大学，上海 200093) 摘要:对复合砌块用两种简化计算方法计算了等效热阻，并与实测值进行了分析比较; 从实际计算得到串并联法比 并串联法更适用于某种类型砌块热阻的简化计算。为提高串并联法的计算精度，通过分析简单计算方法与实测之 间的关系，提出了修正系数函数。采用 ANSYS 软件对设计的砌块进行热模拟，比较计算结果说明修正后的串并联 法具有实用性。计算得到复合砌块 D 的传热系数为 0． 28 W / ( m2 ·K) ，单砖厚的外墙即能满足我国北方大部分地 区建筑节能 65% 的要求。 关键词:复合砌块; 热阻; 修正系数; ANSYS 中图分类号:TU502 文献标识码:A 文章编号:1001-1625( 2011) 06-1430-04 Simplified Calculation for Thermal Resistance of Compound Block XU Hong-xian1 ，XUE Qun-hu1 ，LI Shou-de2 ，HAN Zhi-ming3 ( 1． The State Key Experimental Cultivated Base of West Architecture and Technology，College of Materials Science and Engineering，Xi＇an University of Architecture and Technology，Xi＇an 710055，China; 2． Xi＇an Research and Design Institute of Wall and Roof Materials，Xi＇an 710061，China; 3． University of Shanghai for Science and Technology，Shanghai 200093，China Abstract: Two simplified calculation methods are used to calculate the equivalent thermal resistance of compound block，which are compared with the actual measured value． According to the result of actual calculating，it can be found that the series parallel method is more appropriate to simplified calculation of equivalent thermal resistance than parallel series method for a certain building block． In order to improve the calculation precision of series parallel method， a modification factor function is considered by analyzing the relationship between simplified calculation and actual measured value． Thermal analysis of the block is simulated by software ANSYS，and the simulation results show that the modified series parallel method is useful in practice． The heat transfer coefficient of compound block is 0． 28 W / ( m2 · K) from the simulation results． The calculated heat transfer coefficient of single compound block is 0． 28 W / ( m2 ·K) which is sufficient for meeting the building energy efficient 65%