自然通风建筑能耗全年模拟研究

自然通风是降低建筑能耗的重要手段.现有的软件工具难以准确计算自然通风条件下的全年建筑能耗,限制了自然通风在建筑节能设计中的应用.本文从自然通风计算及耦合计箅两方面进行改进,提出了一套可靠、准确的自然通风与热环境耦合计算的模拟方法和对应的评价指标.而后,以建筑能耗模拟软件DeST为平台,开发出了自然通风风量及建筑能耗的全年逐时模拟软件DeST-Vent+.利用DeST-Vent+软件对北京地区3种自然通风类型下办公建筑的全年空调冷负荷进行了模拟计算,分析了不同通风形式的节能潜力.

Simulation Study on Annual Energy Consumption of Naturally Ventilated Buildings

Natural ventilation is an important measure to reduce the building energy consumption.However,it is difficult for existing softwares to calculate the building energy consumption accurately under the natural ventilation condition,and therefore,the application of natural ventilation in building energy-saving design is restricted.In this paper,a reliable and accurate method for natural ventilation simulation was put forward.Based on the presented method,the simulation program of DeST-Vent+was developed,hence the all-year hourly simulation of natural ventilation airflow and building energy consumption could be realized.Furthermore,the simulation of annual air-conditioning cooling loads of office buildings with different natural ventilation modes in Beijing was carried out with DeST-Vent+,and their corresponding energy-saving potential was analyzed.