工业建筑冷风渗透耗热量的工程计算方法
Calculation methods for infiltration heat loss in industrial buildings
摘要：
随着轻型保温围护结构的广泛应用，现有国家标准中工业建筑冷风渗透耗热量引起的供暖热负荷计算若仍沿用百分比法进行计算，易出现计算结果与实际值相比明显偏小的问题。借鉴国外设计经验，对现有供暖冷风渗透热负荷计算方法进行了简要总结，并详细介绍了百分比法、缝隙法、换气次数法的计算过程及存在问题。同时通过工程实例对几种方法的计算结果进行了比较分析，发现百分比法与缝隙法均不宜直接应用，而根据工厂的围护结构情况有针对性地采用换气次数法则收效良好。
Abstract：
With increasingly wider use of light heat-insulated building envelop, the existing method available for calculating infiltration heat loss in industrial buildings in China, percentage method, is becoming less reliable due to its smaller results compared to actual values in engineering practice. According to foreign design experiences, summarizes the existing infiltration heat loss calculation methods, including percentage method, ventilating rate method and aperture method and gives a detailed introduction of the principles and some problems in application. A case study was performed to analyse and compare these different methods, finding that the percentage method and aperture method should not be directly used, and that the ventilating rate method performs quite well especially for industrial buildings with light heat-insulated envelop.
Keywords:industrial building,infiltration heat loss,percentage method,ventilating rate method,aperture method