夏热冬冷地区住宅外墙内外保温性能分析

以上海地区某卧室作为研究对象,采用数值计算方法,比较了两种间歇运行模式下夏热冬冷地区住宅外墙外保温和外墙内保温两种保温方式的性能.从空调开启时刻室内温度分布来看,外保温的性能优于内保温;从室内热响应特性的角度出发,采用内保温的房间夏季降温(冬季升温)速率较快;从全年能耗的角度出发,采用外保温房间的空调能耗低于采用内保温房间的空调能耗;从室内热舒适的角度出发,采用外保温的房间在空调关闭后热舒适性更好.

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

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.