楼宇分布式能源楼顶流场与温度场分析  

Flow and Temperature Field Analysis for Building Distributed Energy Roof

作　　者：徐静静 江婷 宋洪涛 党超[2] 贾力[2] XU Jing-Jing;JIANG Ting;SONG Hong-Tao;DANG Chao;JIA Li(Huadian Distributed Energy Eng.Tech.Co.,Ltd,Beijing 100160,China;Belting Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale,School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beifing 100044,China)

机构地区：[1]华电分布式能源工程技术有限公司,北京100160 [2]微细尺度流动与相变传热北京市重点实验室北京交通大学机械与电子控制工程学院,北京100044

出　　处：《工程热物理学报》2019年第1期176-182,共7页Journal of Engineering Thermophysics

基　　金：国家重点研发计划资助项目(No.2017YFF0205305)

摘　　要：本文通过数值模拟方法对楼宇分布式能源楼顶各类冷却塔组、烟囱、通风孔等散热设备及整个楼顶空间的流场与温度场进行了分析,探讨了这些散热设备处于运行状态时的相互作用与影响,重点研究了侧风效应对冷却塔组回流现象及运行性能的影响。研究结果表明,相距较近的冷却塔组之间会形成涡旋流动,从而产生回流现象;烟囱和通风孔的高温出流会被冷却塔吸入,加之回流现象,会使得冷却塔进风处空气温度升高,影响冷却塔运行性能;侧风效应对不同冷却塔组的运行性能所产生的影响不尽相同,但侧风风速过高时,均会造成冷却塔组运行性能的下降。In this paper, numerical simulation method was used to analyze the flow field and temperature field for the building distributed energy roof including various cooling tower groups,chimneys, vents and other cooling equipment as well as the roof space. The interaction and influence of these cooling devices were explored in operating state. The effect of crosswind on the backflow and cooling performance of cooling tower groups was studied in detail. The results showed that the vortex flow existed between the cooling tower groups close to each other, resulting in reflux flow.The high temperature outflow of chimney and vents could be sucked by cooling tower groups, which made the temperature at the inlet of cooling towers increasing. Considering the reflux phenomenon,it affected the corresponding operation performance. The crosswind effect presented different effects on the operating performance for different cooling tower groups, but when the crosswind speed was too high, the cooling tower operating performance would be reduced consistently.

关 键 词：蒸发式冷却塔组 侧风效应 回流现象 

分 类 号：TK123[动力工程及工程热物理—工程热物理]