内置热盘管有限封闭夹层空间的传热计算及实验研究  

The Heat Transfer Calculation and Experiment Research on Heat Pipes in the Enclosed Air Space

作　　者：邱林[1] 王文海[1] 游旻昱[1] 

机构地区：[1]北京建筑工程学院,北京100044

出　　处：《工业加热》2004年第6期1-4,共4页Industrial Heating

基　　金：北京市教委科技发展基金资助项目(01kJ-063);北京市"供热;供燃气;通风及空调工程"重点实验室资助项目(kF200401)

摘　　要：内置热盘管的封闭夹层结构内的自然对流换热十分相似于封闭有限水平空间、热面在下,冷面在上时自然对流形成的有序蜂窝状环流现象,加之热辐射的作用,夹层中的综合换热结果,热量传递将强于同条件下的纯空气层热传导。本文用夹层当量导热系数与实际空气导热系数之比表征夹层内换热的放大率,模拟计算了管路及夹层结构、热反射膜情况以及盘管供热工况对换热的放大率和传热效率的影响规律。该结果有助于地板采暖的热设计,并给出相应的实验比较。The natural convection in the enclosed air space with heat pipes was similar to the appearance of honeycomb circulation in sequence produced by natural convection, when heating surface was below and cooling surface was above, addition the heat radiation, its heat transfer effect was greater than that of pure heat conduction in the same condition. The ratio of equivalent coefficient of thermal conductivity of air space to that of pure air was a token magnifying power of heat transfer in air space. This paper calculates the rules of magnifying power of ef- ficiency of heat transfer, which were mostly depended on many factors such as the structure of air space, heat pipes conditions, heat reflecting film and supply water.which were validated by experiments. These conclusions help to design of floor heating and were been compared by ex- periment.

关 键 词：传热 封闭夹层空间 地板供热 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]