Wood plastic composites based wood wall's structure and thermal insulation performance

Abstract

In order to solve the problem of poor thermal insulation in the current wood-plastic building, two kinds of structural wood wall integrated with wood plastic composite (WPC) are designed, and the thermal insulation performances of the walls are studied. The results show that the WPC integrated wall with frame-shear structure has a good stability, and the excellent performance of the WPC can be fully realized. Wall studs and wall panels are important factors affecting the thermal performance of the walls. Wood plastic materials can meet the thermal performance requirements of the walls. The single-layer frame walls and double-layer frame walls integrated with the WPC both have a good thermal performance. According to ‘Design Standard for Energy Efficiency of Public Buildings (GB 50189-2015)’, the heat transfer coefficient of the single-layer frame wall integrated with 20 mm thick WPC wall boards and WPC wall studs is 0.414 W/(m2•K), which can meet the standard of wall thermal level Ⅱt and is suitable for cold areas. The heat transfer coefficient of the double-layer frame wall integrated with 50 mm thick WPC wall panel and WPC wall studs is 0.207 W/(m2•K), which can meet the standard of wall thermal level Ⅰt and is suitable for severe cold areas.