基于不同管径毛细管辐射顶板供冷性能模拟  

Numerical Modeling of Cooling Performance for Capillary Ceiling Radiant Cooling Panel based on Pipe Diameters

作　　者：谢东[1] 王赟[1] 廖买利 丁伟[1] 

机构地区：[1]南华大学城市建设学院

出　　处：《建筑热能通风空调》2016年第11期1-4,48,共5页Building Energy & Environment

基　　金：湖南省自然科学基金(14JJ3100)

摘　　要：建立三维毛细管辐射供冷顶板传热模型，利用CFD方法对不同毛细管管径下辐射顶板流动及传热进行数值模拟求解，以获取辐射顶板的供冷量及辐射表面温度分布状况。数值模拟得到的供冷量与ASHRAE手册中辐射供冷顶棚的传热理论计算结果相符，相对误差小于15％。数值研究表明，当毛细管管径在3~5mm的范围时，辐射顶板能保证良好的供冷性能，辐射表面温度分布均匀；管径大于5mm或者小于2mm，辐射板供冷量明显减少，辐射表面温度分布越不均匀。Heat transfer models of capillary ceiling radiant cooling panel were built in this paper, CFD methods were numerically used to solve flow and heat transfer problems and attain cooling capacities and surface temperature distributions based on different capillary pipe diameter conditions. Simulation results of heat fluxes were good agreement with the values of theoretical heat transfer calculation for ceiling radiant cooling panel depicted in ASHRAE Handbook. The relative errors between predicted cooling capacities and calculated values were less than 15%. The results shown that cooling performance of ceiling radiant panel were enhanced and temperature distribution were uniformity with capillary pipe diameters within the range of 3-5 mm. Cooling capacities reduced significantly when capillary pipe diameters were lower than 2mm or exceeded 5mm, as well as surface temperature distributions were non-uniformity.

关 键 词：毛细管辐射顶板 供冷性能 管径 数值模拟 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]