基于Fluent的埋管式辐射地板传热及供冷能力研究  

Research on heat transfer and cooling capacity ofburied tube radiant floor based on Fluent

作　　者：王培 施志钢[1] 张亮月 刘龙 刘福强 纪文康 WANG Pei;SHI Zhigang;ZHANG Liangyue;LIU Long;LIU Fuqiang;JI Wenkang(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266525,China)

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266525

出　　处：《青岛理工大学学报》2023年第2期154-160,共7页Journal of Qingdao University of Technology

基　　金：山东省高等学校科技计划项目(J18KA189)。

摘　　要：充分了解辐射供冷系统的传热特性有助于该系统的设计、推广及应用。构建了埋管式辐射地板的三维稳态传热模型,进行供冷工况下地板内部传热情况的数值模拟,得到了辐射地板内部及表面的温度场。经实验验证,建立的传热模型与实际误差小于9.01%。模拟分析了换热盘管长度与供水温度对辐射地板的供回水温差、供冷能力及温度分布的影响。结果表明:在相同供水温度下,换热盘管越长,埋管式辐射地板的供冷能力越弱,温度分布均匀性越差,管长每增加10 m,单位面积辐射地板供冷量约降低1.5 W/m^(2);在相同换热盘管长度下,供水温度越高,地板的供冷能力越弱,温度分布均匀性越好。Fully understanding the heat transfer characteristics of radiant cooling system is helpful to the design,popularization and application of the system.Therefore,this paper constructed a three-dimensional steady-state heat transfer model of buried tube radiant floor,carried out numerical simulation of heat transfer inside the floor under the cooling condition,and obtained the temperature field inside and on the surface of the radiant floor.The experimental results show that the error between the established heat transfer model and the actual model is less than 9.01%.The effects of heat exchange coil length and supply water temperature on the temperature difference between supply and return water,cooling capacity and temperature distribution of radiant floor are simulated and analyzed.The results show that at the same supply water temperature,the longer the heat exchange coil is,the weaker the cooling capacity of the radiant floor is and the worse the uniformity of temperature distribution is.The cooling capacity of the radiant floor decreases by 1.5 W/m^(2) per unit area when the pipe length increases by 10 m.With the same heat exchange coil length,the higher the supply water temperature is,the weaker the cooling capacity of the floor is and the better the temperature distribution uniformity is.

关 键 词：土木工程 辐射供冷 FLUENT 埋管式辐射地板 温度分布 供冷能力 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]