中文摘要：

大量研究表明,相比于全室空调,高大空间分层空调的冷负荷更小。但是,他们大多基于两区域或多区域方法分析而存在一定误差,而且忽略了排风的影响。针对这两个问题,将以航站楼类高大空间为例进行分析。通过CFD模拟获得高大空间内更为详细的参数分布,并分析排风对负荷的影响,从而根据能量平衡关系获得高大空间负荷减小的规律。结果表明,高大空间分层空调的冷负荷减小机理为,室内存在温度分层使得围护结构传热量减小以及通过排风将顶部热量排出。根据该机理,提出了三类节能措施,以指导高大空间分层空调系统的设计。

英文摘要：

Lots of studies show that cooling load of stratified air conditioning system in large space building is smaller than that of total room air conditioning system. However, multi-zone model was mostly used to analyze it, which would bring in some errors. What＇ more, the effect of exhaust air was usually ignored. Therefore, combining the two influence factor, airport terminal was selected as an example to analyze the cooling load reduction in this paper. With the detailed indoor parameter distribution by CFD simulation and the analysis of exhaust air, the reduction discipline of stratified air conditioning system was obtained based on the energy balance relationship. The results show that the mechanism of the cooling load reduction is the temperature stratification which reduces the heat gain from the envelope and heat removal through the exhaust air. According to the mechanism, three measures of energy saving were proposed to guide the design of stratified air conditioning system in large space building.