基于EnergyPlus对南京地区应用夜间通风预测

为了对南京地区进行夜问通风的可行性进行预测，选取南京地区某典型办公楼，利用建筑全能耗模拟软件EnergyPlus进行了模拟研究。在典型气象条件下，分别考虑了通风时间，换气次数等因素对室内温湿度及空气比焓的影响。将室内空气焓值的变化等效为空气源热泵空调耗电量，通过对比空调的耗电量与通风风机的耗电量，得出最佳的换气次数，并进行了节能效果分析。结果表明：通风时间选择在室外温度较低的时间段内较为合适。换气次数在不同的通风时间下对应不同的临界点，当换气次数小于临界点的换气次数时，等效空调耗电量大于风机耗电量，此时具有节能效果。当通风时间为6：00～6：30时，换气次数为1-2ac／h时，等效空调的耗电量与风机的耗电量差值的绝对值最大，半小时通风的最大节能达到3．6kWh。

Application Analysis on Night-time Ventilation in Nanjing Area based on EnergyPlus

In order to study the feasibility of night-time ventilation in Nanjing, a typical office building was selected and building energy simulation software EnergyPlus was used to simulate. In the typical weather conditions, considered the ventilation time, the air change rate and other factors on the indoor temperature, humidity, and enthalpy. The change in enthalpy of the indoor air was equivalent to the power consumption of source heat pump air-conditioning, by comparing the energy consumption in fan power consumption. The results show that： ventilation time appropriate to select the time when outdoor temperature is lower. The air change rate corresponds to different critical point in different ventilation time. When air change rate is less than that of the critical point, the equivalent air-conditioning power consumption is greater than the fan power consumption. It has energy-saving effect. When the ventilation time is from 6：00 to 6：30 am, air change rate is 1-2 ac/h, the absolute difference of equivalent air-conditioning power consumption and fan power consumption was maximum, energy saving reach 3.6kWh in half an hour.