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通风换气对营造室内环境有着重要作用,同时对室内热湿环境与供暖空调能耗也有很大影响。通风对室内空气质量具有两重性,可以排除室内污染,又在室外出现严重污染时引入室外污染;对供暖空调能耗也具有两重性,室外环境好时可以节能,室外环境差时增加能耗。现有的通风方式主要有自然通风和机械通风两种,机械通风是一种定量持续恒定的通风方式,而自然通风是一种不定量间歇反馈的方式,这两种通风方式在营造室内环境上存在很多差异。本文以北京夏季的中小型办公建筑为典型案例进行模拟计算,通过对比分析两种通风方式的CO2浓度、温度及冷负荷,探讨两种通风方式的差异及适宜性。
Ventilation to create an indoor environment has an important role, while the indoor thermal environment and heating and air conditioning also have a great impact on energy consumption. Ventilation has a dual nature of indoor air quality, which can eliminate indoor pollution and introduce outdoor pollution when there is serious outdoor pollution. The energy consumption of heating and air conditioning also has duality. When the outdoor environment is good, it can save energy and increase the energy consumption when the outdoor environment is poor. The existing ventilation methods are mainly natural ventilation and mechanical ventilation two kinds of mechanical ventilation is a constant quantitative constant ventilation, and natural ventilation is a non-quantitative feedback intermittent way, the two ventilation in the creation of indoor environment There are many differences. This paper takes Beijing summer small and medium-sized office building as a typical case to simulate the calculation. By comparing and analyzing CO2 concentration, temperature and cooling load of the two ventilation modes, the differences and suitability of the two ventilation modes are discussed.