冷风侵入对热风供暖房间室内热环境影响的实测研究  

Experimental Study on the Influence of Cold Air Infiltration on the Thermal Environment in a Warm Air Heating Room

作　　者：房玉恒 叶筱[1] 钟珂[1] 亢燕铭[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《东华大学学报（自然科学版）》2017年第1期109-114,共6页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金资助项目(51278094);上海市教委科研创新重点资助项目(13ZZ054)

摘　　要：侵入室内的室外冷风不仅会造成室内近地面温度过低,也会使供暖能量利用率明显下降.针对不同冷风侵入量和侵入频率时的热风供暖房间室内热环境进行了试验研究.结果表明:供暖房间时间平均温度不受冷风侵入频率影响,仅空气温度波动幅度随着冷风侵入频率的减小而增大;随着冷风侵入量的增加,室内温度梯度增大,且供暖能量利用率下降;在有明显冷风侵入的场合,送风量相同时,采用较大送风速度是减弱冷风侵入不良影响的关键.In a room with significant cold air incursion through the doors, the invading cold air not only causes lower temperature near the floor, but also reduces the heating energy utilization rate evidently. Experiments are carried out to investigate the effect of the amount of the invading cold air and the invading frequency on the indoor thermal environment in a warm air heating room. The results indicate that the invading frequency has weak effect on the time averaged temperature of the heating room and only affects the amplitude of the indoor air temperature fluctuation, i. e. the amplitude of the indoor air temperature fluctuation increases with the decrease of cold air invading frequency. As the amount of the incursion air increases, the indoor temperature gradient becomes larger and the heating energy utilization rate is reduced. Under the situation with significant cold air infiltration, high supply velocity is the key to reduce the negative effect of cold air incursion when the supply air volume keeps constant.

关 键 词：冷风侵入 热风供暖 温度梯度 供暖能量利用率 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]