双面辐射楼板换热性能的实验研究

Experimental Research on Heat Transfer Performance of Double-sided Radiation Floor

以重庆地区某别墅作为实验对象,供热热源采用土壤源热泵,地板辐射供暖系统采用双面辐射楼板。将上下两层的两个房间作为测试房间,对测试房间的供回水温度、流量、围护结构表面温度、室内空气温度进行实测。基于实测数据,对双面辐射楼板上下表面的辐射换热表面传热系数、对流换热表面传热系数、热流密度进行了计算。双面辐射楼板以辐射传热为主,辐射热流密度是对流热流密度的2.4倍(平均值),且上表面的辐射、对流热流密度均大于下表面。

In the experiment of a villa in Chongqing area, ground source heat pump is used as heat source, and double-sided radiant floor is used as radiant floor heating system. Ttle two rooms on upper and lower floors are the testing rooms, and their corre- sponding parameters including supply and return watertemperatures, flow rate, surface temperature of build- ing envelop and indoor air temperature are measured. Based on the measured data, the radiant heat transfer coefficient, convective heat transfer coefficient and heat flow density on upper and lower surfaces of the double-sided radiation floor are calculated. The doub- le-sided radiant floor is based on mainly radiant heat transfer, and the radiant heat flow density is 2.4 times （average value） that of the convective heat flow densi- ty. The radiant and convective heat flow densities on the upper surface are all more than those on the lower Surface.