航站楼等高大空间建筑渗风测试计算方法研究

Field Test and Calculation Methods of Infiltration Rate in Large Space Buildings such as Airport Terminals

无组织渗风是影响航站楼等高大空间建筑热湿环境的重要因素,本文针对此类大空间建筑渗透风的测试计算方法进行了比较研究。在给出风速测试法、CO_2浓度法、含湿量法与热量平衡法来测试计算渗透风量原理的基础上,对不同方法的误差来源和影响因素进行了定量分析,结果表明风速v、室内外CO_2浓度差ΔC、含湿量差Δd、温差Δt等是影响各方法误差和准确性的重要因素。以4种方法为指导,对某航站楼值机大厅的过渡季渗透风量进行了测试计算分析,为分析此类建筑的渗透风影响提供了有效工具。

Unorganized air infiltration is an important factor influencing the temperature and humidity in large space buildings such as airport terminal. This paper mainly studies the calculation methods of air infiltration in large space buildings through comparison. The wind speed test method,tracer gas method,moisture content method and heat balance method for investigating air infiltration are introduced. Error sources and influencing factors of different methods are then quantitatively analyzed. The results show that wind speed v,and indoor and outdoor CO_2 concentration difference ΔC,moisture content difference Δd,and temperature difference Δt are important factors that affect the accuracies of different methods respectively. Based on the four methods,field test and calculation of infiltration rate in the transitional season is carried out in an airport terminal,in the hope to provide an effective tool for analyzing the influence of air infiltration on such buildings.