夏热冬冷地区近零能耗住宅室内湿特性分析

Indoor Humidity Environment Analysis of Nearly Zero Energy Residence in Hot Summer and Cold Winter Zone

摘要:

以夏热冬冷地区近零能耗住宅和常规住宅为研究对象，计算了夏季和除湿期的除湿量，对比研究了两种建筑的热湿比特征和室内高湿度问题。研究结果表明：近零能耗住宅和常规住宅除湿量变化主要取决于新风和渗透风量，无人时段换气次数对总除湿量影响较小。在不考虑新风显热负荷和湿负荷的情况下，近零能耗住宅夏季和除湿期的热湿比分别降低至常规住宅的45.3%和38.5%。以室内温度为控制参数时，近零能耗住宅在夏季和除湿期的室内高湿度时长比常规住宅长。夏季减小近零能耗住宅无人时段的开窗换气次数，除湿期适当开窗通风有助于减少室内的高湿时数。

关键词:夏热冬冷地区;近零能耗建筑;除湿量;热湿比;换气次数

Abstract:

Taking the nearly zero energy residence and conventional residence in hot summer and cold winter zone as research objects, the dehumidification capacity in summer and dehumidification period was calculated. The characteristics of angle scale and indoor high humidity of two kinds of buildings were studied comparatively. The results show that: the variation of dehumidification capacity of nearly zero energy residence and conventional residence are mainly determined by the amount of fresh air and infiltration rate. Air exchange rate during uninhabited period have little influence on the dehumidification capacity. Without considering the sensible heat load and moisture load of fresh air, the angle scale of nearly zero energy residence in summer and dehumidification period is reduced to that of conventional residence 45.3% and 38.5% respectively. High humidity period of nearly zero energy residence in summer and dehumidification period is longer than that of conventional residence when indoor temperature is selected as the control parameter. Limiting the air exchange rate during uninhabited period of nearly zero energy residence in summer and ventilating properly in dehumidification period contributes to decrease the indoor high humidity time period.

Key words:hot summer and cold winter zone;nearly zero energy building;dehumidification capacity;angle scale;air exchange rate