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将毛细管网、PE地暖管分别与沙子及相变材料结合应用于低温地板辐射采暖系统,通过实验研究4种不同组合形式下的供暖效果和蓄放热特性。结果表明:白天达到相同实验房间温度所需的充热时间,沙子-毛细管网组合是沙子-PE管的40%,相变材料-毛细管网组合则是相变材料-PE管的44%。进一步考察夜间停止热水循环后,利用4种组合形式的蓄热对房间的供暖效果,发现相变材料作为填充层的持续放热时间是沙子时的2倍。对于相变材料-毛细管网组合,较大热水流量(1.40m3/h)时地板蓄热量是小流量(0.81m3/h)时的1.4倍,且大流量情形在放热过程维持舒适房间温度的时间是小流量时的1.14倍。实验结果为相变材料蓄能与毛细管网结合用于太阳能低温热水采暖,降低常规地板采暖能耗提供了依据。
The capillary network and PE floor heating pipe were respectively combined with sand and phase change material for low temperature radiant floor heating system. The heating effect and heat storage and storage characteristics of 4 different combinations were studied experimentally. The results showed that the time required to reach the same experimental room temperature during the day was 40% of the sand-capillary tube and 44% of the phase-change material-capillary tube. After further investigating the effect of heating on the room by using four combinations of heat storage after stopping the hot water circulation at night, it was found that the phase change material used as the filler layer had a sustained exothermic time of 2 times that of the sand. For the phase change material-capillary network combination, the floor heat storage is 1.4 times greater than the low flow rate (0.81m3 / h) for large hot water flow rates (1.40m3 / h) and the large room flow conditions maintain comfortable room temperature during the exotherm The time is 1.14 times when the small traffic. The experimental results provide the basis for phase change material storage and capillary network combined with solar low temperature hot water heating and reduce energy consumption of conventional floor heating.