碰撞射流与混合通风系统对高大空间供暖效果的影响  

Effects of the Impinging Jet Ventilation and Mixing Ventilation on Warm-Air Heating System in the Large-Height Space

作　　者：陈杰[1] 亢燕铭[1] 叶筱[1] 钟珂[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2期254-259,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：通过数值模拟的方法对比研究了碰撞射流通风(IJV)与不同送风口位置的混合通风(MV)的供暖特性.结果表明:IJV房间的温度分布均匀,其热风在室内的混合程度与供暖能量利用率明显大于MV,且MV的送风口位置越高,IJV的节能优势越明显;IJV的人员吹风感风险大于MV,但仍在可接受的范围内.虽然MV送风口位置越高,吹风感就越小,但这是以高能耗为代价的.因此在对人体吹风感无特殊限制,且MV送风口位置不宜过低的高大空间中,使用IJV可以同时实现节能与舒适度的要求.Numerical simulations have been carried out for comparing and studying the heating characteristic between impinging jet ventilation（IJV）and mixing ventilation（MV）with different height of inlet.The results show that the temperature distribution of IJV room is uniform,the mixing extent of indoor warm-air and energy-using efficiency is significantly higher than that in a MV room,and the higher height of MV inlet,the more obvious energy saving advantages of IJV.The draught risk of IJV is higher than MV,but is still in an acceptable range.The higher height of MV inlet,the smaller draught risk,but this is at the expense of high energy consumption.Therefore,IJV can achieve energy saving and comfort requirements at the same time in a large-height space when we have no special restrictions on draught risk and the height of MV inlet is inappropriate to be too low.

关 键 词：碰撞射流通风 混合通风 能量利用系数 送风口位置 吹风感 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]