高孔洞率复合保温砌块设计及热工性能影响因素  

Design of High Porosity Composite Insulation Block and Influence Factors of Its Thermal Performance

作　　者：苏宇峰[1,2] 梁世英 SU Yufeng;LIANG Shiying(School of Materials Science and Engineering,Tongji University,Shanghai 201804,China;Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学材料科学与工程学院,上海201804 [2]同济大学先进土木工程材料教育部重点实验室,上海201804

出　　处：《建筑材料学报》2018年第5期754-760,共7页Journal of Building Materials

基　　金："十三五"国家重点研发计划项目(2016YFC0700802);上海市科学技术委员会科研计划项目(17DZ1200303)

摘　　要：提出了高孔洞率复合保温砌块孔型的设计方法,同时采用ABAQUS有限元软件进行数值模拟,分析了复合保温砌块的孔型排布、孔洞率和材料导热系数对其热工性能的影响.结果表明:复合保温砌块的热阻随孔洞率的提高而增加,随实体材料导热系数的降低而增加,随填充的保温材料导热系数的降低而增加;通过数值模拟计算,得到了复合保温砌块热阻与孔洞率、实体材料导热系数、保温材料导热系数的关系公式;在灰缝对墙体传热影响很小的情况下,当砌块孔洞率为60%时,240mm厚单一砌块墙体的传热系数能达到0.29W/(m2·K),满足砌块和墙体热工性能大幅提升的需求.A method for designing high porosity composite insulation block was proposed.The numerical simulation of composite insulation block was carried out by using ABAQUS finite element software.The influence of pore configuration,porosity and thermal conductivity of materials on the thermal performance of the composite insulation block was studied.The results show that the thermal resistance of the composite insulation block increases with increase of porosity,decrease of thermal conductivity of the matrix material and filled thermal insulation materials.Through numerical simulation,the relation formulas between the thermal resistance of composite insulation block and porosity,thermal conductivity of the matrix materials,filled thermal insulation materials were obtained.In the case that the mortar joint has little effect on heat transfer of wall,when the porosity of the block is 60%,the heat transfer coefficient of 240 mm thickness single block wall can reach 0.29 W/(m 2·K),it can meet the demand of substantial improvement of the thermal performance of block and wall.

关 键 词：复合保温砌块 热工性能 导热系数 孔洞率 ABAQUS 

分 类 号：TU522.3[建筑科学—建筑技术科学]