哈尔滨地区办公建筑夜间机械通风能耗及室内热环境分析
Energy consumption and indoor thermal environment of night mechanical ventilation in an office building in Harbin
摘要：
采用EnergyPlus软件对哈尔滨地区典型办公建筑在常规空调系统运行模式与夜间机械通风系统运行模式下的室内热环境和能耗进行了模拟。结果表明，在哈尔滨地区，白天室外最高温度高于24 ℃时都适合进行夜间机械通风，一共约60 d，占空调运行期的72.3％；整个夏季空调运行期内，采用夜间机械通风系统该办公建筑节电量指标为1.15 kWh/(m2·a)，节省运行费用指标为1.02元/(m2·a)；在人工制冷阶段，夜间机械通风模式下的室内热环境明显优于常规空调模式，且房间体积与表面积比越小，越有利于提高室内环境的热舒适性；当室内空气设计温度较高时，室内温度下降大，延迟人工制冷开启时间长，但是节能量未必比室内设计温度较低时高。
Abstract：
Simulates indoor thermal environment and energy consumption in a typical office building with night mechanical ventilation and conventional air conditioning system in Harbin with EnergyPlus software. The results show that the periods when the maximum outdoor temperatures are higher than 24 ℃ are suitable for night ventilation, the corresponding length is about 60 days, taking 72.3 percent of the summer cooling season. When the air conditioning system is used in Harbin, this night ventilation system would offer a 1.15 kilowatthour per square metre per annum reduction in energy consumption for cooling and a 1.02 yuan per square metre per annum reduction in electricity cost. It can improve the indoor thermal comfort significantly in the air conditioning system operating stage during the daytime with night mechanical ventilation. The smaller the ratio of the room volume to its surface area is, the more effective the improvement of thermal comfort is. The higher the indoor design temperature is, the more quickly the indoor temperature drops. Therefore, the start time of the air conditioning system can be delayed. However, thd energy saved may not be more than that with the lower design temperature.
Keywords:nightmechanicalventilation,officebuilding,energyconsumption,indoorthermalenvironment