中文摘要：

地板送风系统通过安装于架空地板上的旋流或格栅型散流器送风,架空地板下的静压箱是其区别于置换送风系统和全混送风系统的重要特征之一。本文采用数值模拟的方法对有、无静压箱工况下的下送风系统进行了对比研究,通过对室内流场和温度场的分析,考察了静压箱对室内热平衡的影响。其次,通过负荷有效系数计算了温度分层环境下的空调负荷,并给出了负荷有效系数的数值计算方法,可为今后地板送风系统的工程设计提供参考。

英文摘要：

The underfloor air distribution（UFAD） system delivers air through the diffusers of swirling or grille type which are installed on the raised floor.The plenum under the raised floor is one of the important features making the system different from the displacement system and well-mixed system.In this paper,UFAD systems with and without the plenum were studied by numerical simulation.Through the analysis of indoor air flow field and temperature field,the influence of plenum on indoor thermal balance was investigated.And then,the effective cooling load factor（ECLF） was used to calculate the cooling load under the stratification environment,which was useful for the engineering design of UFAD system.