门窗缝隙渗透冷空气耗热量计算探讨

Discussion on the Calculation of Heat Consumption of Cold Air Infiltration Through Gaps in Doors and Windows

在建筑物供暖热负荷计算中,门窗缝隙渗入冷空气的耗热量受到重视。在本科教材、设计手册和规范中其计算公式比较成熟且应用已久,但目前看计算公式中的个别系数取值过时,而且建筑物受风压和热压综合作用比较复杂、设计师在设计中易感困惑。而随着建筑物节能措施的完善、外窗的缝隙很小,同时由于设计规范的更新,有必要对其进行讨论。就此对冷风耗热量的计算公式进行分析、并对夏季渗透冷负荷以及风压、热压作用动力尝试定量推导,抛砖引玉、期望业内专家批评指正。

In the calculation of heating heat load in buildings,the heat consumption of cold air infiltrating into the gaps of doors and windows is paid attention to.In undergraduate textbooks,design manuals and specifications,its calculation formulas are relatively mature and have been used for a long time,but at present,the individual coefficients in the calculation formulas are outdated,and the comprehensive effect of wind pressure and thermal pressure on buildings is relatively complex,and designers are designing easily confused.With the improvement of energy-saving measures in buildings,the gap of external windows is very small,and due to the update of design specifications,it is necessary to discuss them.In this regard,this paper analyzes the calculation formqula of cold air heat consumption,and attempts to quantitatively deduce the cooling load infiltration in summer,as well as the power of wind pressure and heat pressure.