持续供暖时长对间断供暖房间能耗的影响

Influences of Heating Time-Duration on Energy Consumption in Intermittent Heating Room

针对冬冷夏热地区冬季常采用间断供暖模式的现象,通过数值模拟的方法对其供暖能耗特点进行了研究.结果表明,保温层位置、供暖持续时间与间断时间等因素对供暖能耗影响很大.持续供暖时间越短,平均热指标qλ,i越大;相同持续供暖时间时,外墙采用内保温时的能耗低于外保温的能耗,但是随着供暖周期的增加,内保温的节能优势逐渐下降.

Numerical simulation have been carried out for analyzing energy consumption characteristics of residential buildings with intermittent heating in hot summer and cold winter zone of China. The results show that the location of thermal insulation layer, heating time-duration and time interval between two durations have significant impacts on heating energy consumption. The shorter the lasted heating time is, the higher the value of mean heating load index（qλ,i） is. For the same heating time-duration, when external and internal thermal insulations are respectively used on the exterior wall, the energy consumption of the latter one is lower than the former one. However, the energy-saving effects of internal thermal insulation would decrease with increasing the number of heating cycle of this heating mode.