高大空间风口位置高度对供暖效果的影响  

Effects of the Heights of Air Inlet and Outlet on Warm-Air Heating Systems in Large-Height Spaces

作　　者：钟珂[1] 王新伟[1] 华凤皎[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）》2014年第3期334-338,378,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：分层气流组织可以改善高大空间热风供暖的节能性和热舒适效果.为估计这种气流方式对室内热环境的改善效果,在利用实验验证数值计算方法的基础上,通过数值模拟探讨了大空间送、回风口高度对室内热环境的影响.研究结果表明:送风口位置位于较低的位置时,热风供暖的能量在这种房间下部区域的利用率较高;当送风口位置增加到8.5m且上回风时,即使以高能耗为代价,室内热环境也难以满足人体热舒适要求.此外,根据模拟结果对不同情况下的供暖能量利用系数做了分析,并对改善大空间冬季热风供暖的节能和热舒适性给出了一些建议.Stratification of indoor air flow can be employed to improve energy efficiency and thermal comfort in large-height spaces. In order to estimate the effectiveness by using such air flow patterns for room heating, numerical simulations have been carried out for exploring the effects of the heights of air inlet and outlet on the indoor thermal environment, and the numerical scheme is validated by test data. The results show that the energy carried by the incoming warm air can be used with high efficiency when the supply inlet is situated at the lower part of the space in warm air systems. When the height of the inlet is increased to more than 8.5 m in a ＇top-return＇ system, the indoor thermal conditions would not match the requirements of the occupants＇ thermal comfort even if high energy consumption is available. The energy-using coefficient is discussed for different cases by using the numerical results, and some recommendations are given for the energy saving in space heating by warm air and the improvement of indoor thermal environment in winter.

关 键 词：高大空间 热风供暖 能量利用系数 室内热环境 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]