冷却顶板-置换通风联合系统房间内的颗粒物浓度分布 the particle concentration distributions in a room with chilling ceiling and displacement ventilation combined room.pdfVIP

2008年6月 第2期 冷却顶板一置换通风联合系统房间内的颗粒物浓度分布 t 东华大学环境科学与工程学院翟志斐亢燕铭钟珂 摘 要利用数值方法，模拟了冷却顶板与置换通风联合空调系统下室内空气温度、速度和粒子浓度分布特征。 结果指出，这种空调通风方式中，室内垂直温差小，可形成良好的室内热环境、并有较好的热舒适性。对于室 内粒子浓度分布，在典型污染高度下，呼吸面高度处粒子浓度较高，但在热泳力的作用下，贴近人体的小范围 内粒子浓度明显降低。同时，由于冷吊顶成为粒子汇，房间上部区域的粒子浓度较低。 关键词粒子；冷却顶板；置换通风；数值模拟 TheParticle DistributionsinaRoomwith Dis- COncentration and ChillingCeiling VentilationCombinedRoom placement Zhai and Ke Zhifei，KangYanmingZhong AbstractTheeffectoftheindoorair and concentrationdistributionswere velocity,temperatureparticle investigatedby numerical inaroomwith and ventilation．n圮resultsindicatethatsmallvertical simul撕ng chillingceilingdisplacement in thermal thermal differencetheroomcancreatean indoor environmentand comfort．ncresults temperature acceptable alSOshow contaminantsourceatthe fromthe concentrationattheface is that，with height floor,the height typical particle thatother tOthe concentrationclosetothehumanmodeldecfeases positions．But，due force，the higher thermophoretic is for tO ontothesurfaceof concentrationde- obviously．Similarly，iteasyparticlesdeposit chillingceiling，theparticle creasesinthe zonesoftheroomdueto upper thermophoreticmigration． simulation KeywordsParticle：Cllillingce