热源强度对一种新型个性化送风方式性能的影响研究

Influence of heat source intensity on performance of a new personalized air supply method

为了改善具有强热源的工业建筑中人体的局部微环境,提出了一种基于贴附效应的新型个性化送风方式。采用数值模拟方法研究了热源强度对该送风方式作用下的人体微环境流场和人体表面传热量的影响。结果表明,只有当热源达到一定强度时,热源热羽流才会对人体微环境的流场产生影响,当格拉晓夫数(Gr)为10^(10)、风口送风速度为0.3 m/s时,人体表面的对流换热量比仅为20%。

In order to improve the local microenvironment of human bodies in industrial buildings with strong heat sources,a new personalized air supply method based on attachment effect is proposed.In this paper,numerical simulation method is used to study the influence of heat source intensity on the flow field characteristics and heat transfer intensity of human surface under the action of the air supply method.The results show that only when the heat source intensity reaches a certain degree,the heat plume of the heat source will have a significant impact on the human microenvironment flow field.When the Grashof number(Gr)is 10^(10) and the air supply speed of the air outlet is 0.3 m/s,the convective heat transfer ratio of human surface is only 20%.