Application of External Wall Insulation Materials for Residential Buildings in Hot Summer and Cold Winter Area Under Intermittent Operation of Radiant Air Conditioning

In order to optimize the envelope of residential buildings in the summer and winter cold areas, the influence of external wall insulation material on the intermittent operation effect of prefabricated trench floor radiation system was studied. And the indoor air temperature, thermal response time, the total cumulative hot/cold load and total annual cumulative load was integrated as evaluation indicators to evaluate the various schemes through the entropy weight TOPSIS method. Thus, the optimal insulation material and insulation form were proposed. The results show that when 200 mm aerated concrete block is used as the main material of the exterior wall, the forms of external insulation and internal insulation are respectively adopted, and the comprehensive score is ranked as Rigid polyurethane > Extruded polystyrene board > Glass wool > Expanded polystyrene board > Rock wool. The thermal conductivity is more important than the heat storage coefficient. The smaller the thermal conductivity, the better the thermal insulation performance. In addition, external insulation forms are better than internal insulation.