上置式置换通风模式的数值模拟及其性能分析

Up-fixing Type Displacement Ventilation Modal Numerical Simulation and Performance Analysis

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 diffusers of displacement ventilation system which is suitable to office is put forward here UFDDVS.The mathematical model and physical model of UFDDVS is built according to speed field,temperature field,air condition,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,improve cool load capacity indoor,meanwhile,higher air quality indoor is got.