Study On Thermal Performance Of Recycled Foam Ceramic Wall

Recycled foam ceramic insulation wall board is a new self-insulation wall made of ceramic waste and waste porcelain tailings.After many complicated processes,high-temperature firing,natural melting and foaming.The interior is filled with airtight pores,so it is lightweight and non-combustible.The new wallboard can digest and utilize a large amount of solid waste,which can effectively improve the external wall insulation effect of the building.It has excellent economic effects and energy saving and environmental protection effects,and is worthy of further research and promotion.The current concrete structure wall materials are mainly selected from various concrete blocks and sintered hollow bricks.These blocks are mainly composed of clay,cement,sand,stone and other materials,causing a large amount of environmental pollution and waste of resources.Moreover,the construction process using masonry consumes a lot of labor and on-site operation time,and the quality is difficult to guarantee.For many new types of walls,there are still many problems.Although some of the walls have achieved factory production,they cannot avoid large-scale wet work on site,and the process is very complicated,which is a great obstacle to large-scale promotion.Therefore,the development of new lightweight,high-strength,environmentally-friendly and energy-saving wall materials is the direction of future architectural development.Since the 21st century,foam ceramics have become more and more widely used in building materials and other aspects.This material has excellent properties such as light weight,high strength,heat resistance,waterproofing,and compatibility with cement mortar and concrete.performance.This subject uses the regenerated high-strength foam ceramics produced by Zibo Yongxu Refractory Co.,Ltd.The apparent density of this foam ceramic material is between 200kg/m~3-500kg/m~3,and the thermal conductivity is 0.04W/(m·K)-0.06.Between W/(m·K)is an ideal lightweight energy-saving wall material.In this paper,the thermal performance of foam ceramic wall is further studied and analyzed.The thermal conductivity of the foam ceramic material was measured.The thermal conductivity of the foamed ceramic material was measured by the heat-shielding method to be0.056 W/(m·K).According to the norm theory,the average heat transfer coefficient of the wall was 0.354 W/(m~2·K);Through theoretical analysis,analyze the possible heat transfer state of the wall,establish a calculation model,and use the finite element software ANSYS thermal analysis module to carry out finite element simulation of the heat transfer process of the wall to obtain the wall under different seasons.The temperature distribution cloud map and the heat flux density cloud map calculated according to the normative concept that the heat transfer coefficient of the 200 mm thick wall is 0.375 W/(m~2·K),and the error between the two is 5.9%.The test results show that the heat transfer coefficient calculated in the concept of finite element analysis is not much different from the heat transfer coefficient calculated by the thermal conductivity of the wall material.It is proved that the heat transfer coefficient of the wall can be based on the thermal conductivity theory of the material.Calculation and finite element simulation verification.The results of the energy-saving design of the project example show that the heat transfer coefficient of the wall material used in this project is slightly larger than the limit of?0.35 W/(m~2·K)in the cold A zone required by the specification.After the thermal performance trade-off is judged,the thermal performance of the wall meets the energy-saving requirements of the“Shandong Province Energy Efficiency Design Standard for Residential Buildings”(DB37/5026-2014).It shows that this wall can be used as a new building energy-saving wall for rural low-rise residential buildings.