上置式置换通风模式的数值模拟及其性能分析

摘要

传统的置换通风模式会导致室内人员的热舒适感低、送风口位置受限和承担室内冷负荷能力不足等问题,基于此提出了一种适用于办公内区的风口上置置换通风系统UFDDVS.根据内区办公室内的速度场、温度场、空气龄、PMV和PPD等参数的通风工艺要求,建立了UFDDVS的数学模型和物理模型.借助CFD软件,对UFDDVS进行了数值模拟.结果表明:UFDDVS在理论上是可行的,且能够提升室内人员的热舒适感,增强室内冷负荷的供给能力,同时获得较高的室内空气品质.%traditional displacement ventilation mode can make hot comfortable sensation of indoor person low,air supply outlet position is limited and cool load capacity is insufficient,so a kind of up-fixing diffus-ers of displacement ventilation system which is suitable to office is put forward here UFDDVS.The mathe-matical model and physical model of UFDDVS is built according to speed field,temperature field,air condi-tion,PMV and PPD.With CFD,the numerical simulation of the UFDDVS is carried out.The result shows that the UFDDVS feasible in theory,it can improve the hot comfortable sensation of indoor persons,im-prove cool load capacity indoor,meanwhile,higher air quality indoor is got.