地板送风空调系统静压箱送风均匀性模拟研究

摘要

Establishes a model of underfloor plenum chamber,simulates and analyses the influences of the height of plenum chamber and the density of air supply outlets on the uniformity of supplied air.Uses the imbalance rate of supplied air as the uniformity evaluation index of supplied air with underfloor plenum chamber.The results show that the air supply uniformity of plenum chamber gets better with the increase of plenum height,so there is a minimum plenum chamber height which gets smaller with the decrease of the density of air supply outlets.The air supply uniformity gets worse with the increase of the density of air supply outlets.The distance between air supply outlet and air inlet in plenum chamber impacts both the minimum plenum chamber height and the air supply uniformity,and the distance should be kept in a reasonable value in project design.%建立了地板静压箱的模型，针对静压箱高度和送风口密度对送风均匀性的影响进行了模拟分析。引入送风不平衡率作为评判地板静压箱送风均匀性的指标。结果显示：静压箱送风均匀性随着静压箱高度的增大而提高，存在最小静压箱高度，最小静压箱高度随送风口密度减小而降低；送风均匀性随送风口密度的增大而降低；最小静压箱高度及送风均匀性还受静压箱送风口与进风口距离的影响，实际工程设计时送风口与进风口之间应保持合理的距离。