摘要
辐射供暖系统具有较高的热舒适性和节能潜力,已越来越多被应用于现代建筑中。本文采用Computational Fluid Dynamics(CFD)数值方法模拟机械通风对辐射供暖系统的影响。结果表明,辐射供暖相比散热器供暖室内温度分布更为均匀,垂直温度梯度小,具有更好的热舒适性,达到室内设计温度时辐射供暖热源温度低,节能和安全性更好。辅以机械通风后,地板辐射供暖系统总换热量增加,其中对流换热比增加到42.98%,比传统封闭式地板辐射供暖系统的对流换热比提高11.98%。当机械通风系统的送风速度为1 m/s,风口高度为0.1 m时,通风地板辐射供暖系统的室内热舒适性最佳。
Radiant heating systems have high thermal comfort and energy-saving potential,and have been increasingly used in modern buildings.In this paper,the Computational Fluid Dynamics(CFD) numerical method is used to simulate the influence of mechanical ventilation on the radiant heating system.The results show that compared with radiator heating,the radiant heating has a more uniform temperature distribution in the room,a smaller vertical temperature gradient,and better thermal comfort.When the indoor design temperature is reached,the temperature of the radiant heating source is low,which is more energy-saving and safer.With the aid of mechanical ventilation,the total heat transfer of the radiant floor heating system increases, of which the convective heat transfer ratio increases to 42.98%,which is 11.98% higher than that of the traditional enclosed radiant floor heating system.When the opening is 0.1 m high and the air supply speed is 1 m/s,the radiant heating system has the best indoor thermal comfort.
作者
丁业凤
冯劲梅
蔡加熙
Ding Yefeng;Feng Jinmei;Cai Jiaxi(College of Urban Construction and SafetyEngineering,Shanghai Institute of Technology)
出处
《区域供热》
2021年第6期26-36,共11页
District Heating
基金
上海市联盟计划LM201940。
关键词
辐射供暖
机械通风
热舒适
空气分布
数值模拟
radiant heating
mechanical ventilation
thermal comfort
indoor air distribution
CFD
