航站楼类高大空间分层空调设计冷负荷减小率的数值分析
Numerical analysis on design cooling load reduction ratio of stratified air conditioning system in airport terminal buildings
摘要：
高大空间分层空调设计冷负荷通常采用经验系数法计算，对于航站楼类高大空间，经验系数的取值研究较少。以无锡某航站楼的远机位候机厅、近机位候机厅和办票大厅3个高大空间为例，利用CFD软件，在夏季空调设计工况下通过调整送风参数使工作区温度达到室内参数设计要求，求出分层空调冷负荷，并获得分层空调负荷相比于全室空调负荷的减小率，1减去该减小率所得数值即为航站楼类高大空间冷负荷计算所用的经验系数。结果表明，航站楼因围护结构形成的冷负荷占总冷负荷的比例较小且顶部不能设置排风口，分层空调设计冷负荷计算所用的经验系数取0.85~0.95较为合适。
Abstract：
The design cooling load of stratified air conditioning system in large-space buildings is usually calculated by the empirical coefficient method, and there is little research on the airport terminal buildings. Takes the departure hall for remote parking bay, departure hall for near parking bay and chick-in hall of a terminal in Wuxi as examples. By modifying the air jet parameters in summer air conditioning design condition with the CFD software, the average temperature in occupied zone would reach the indoor designed requirements. The cooling load of stratified air conditioning system is decided by the air jet parameters, and the reduction ratio of cooling load of the stratified air conditioning system to that of the well-mixed air conditioning system is obtained. The difference between 1 and the reduction ratio is the empirical coefficient value for cooling load of airport terminal buildings. The results show that the empirical coefficient for airport terminal buildings should be from 0.85 to 0.95, due to the small proportion of cooling load from the envelope and few exhaust openings in the upper zone.
Keywords:airportterminal,largespace,stratifiedairconditioning,designcoolingload,empiricalcoefficient,reductionratio