Thermal Performance Analysis of Internal and External Insulation for Exterior Walls of Residential Buildings in Hot Summer and Cold Winter Zone

Abstract:

A bedroom in Shanghai was used for numerical calculations and twooperation modes were assumed. The energy consumed for heating and cooling and the thermal comfort during the offperiods were measured. The results show that the temperatures are closer to the design temperatures at the air conditioner (AC) start moment when placing the insulation layers on the outside of the exterior walls. The temperature variation speeds of the bedroom are faster when placing the insulation layers on the inside of the exterior walls. Taking the energy used during the AC onperiods and the thermal comfort during the offperiods into considerations, the thermal performance is better when placing the insulation layers on the outside of the exterior walls.