相变材料蓄能式毛细管网地板辐射采暖实验研究  

EXPERIMENTAL INVESTIGATION ON FLOOR RADIANT HEATING USING CAPILLARY MAT AND PHASE CHANGE MATERIALS FOR ENERGY STORAGE

作　　者：何静[1] 周国兵[1] 冯知正[1] 杨来顺[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《太阳能学报》2013年第10期1802-1809,共8页Acta Energiae Solaris Sinica

基　　金：建筑安全与环境国家重点实验室开放课题基金(BSBE2010-01);河北省自然科学基金(E2008001231)

摘　　要：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。A low-temperature radiant floor heating system was set up with the capillary mat and the common PE pipe combined with sand and phase change material （PCM）, respectively. Experimental investigations were performed on the heating performance and charge/discharge characteristics of these four different combinations. The results showed that during the daytime, the time attaining the same room temperature for sand-capillary combination is only 40% of that for sand-PE pipe combination and the corresponding time for PCM-capillary mat combination is 44% of that for PCM-PE pipe combination. After the auxiliary heat source was closed at night, the room heating effect was examined for these four combinations for heat storage in floor layer. It was found that phase change material as the heat storage layer releases heat 2 times longer that using the sand. Further experiments were performed on the PCM-capillary mat combination for different flow rates of hot water. The results showed that the heat storage rate by higher flow rate of 1.4 m^3/h is 1.4 times for the lower flow rate of 0.81m^3/h. The time period keeping the comfortable room temperature for high flow rate is 1.14 times longer for the low flow rate. The experimental results are helpful to the design of solar-hot-water radiant heating system with the combination of the PCM and the capillary mat, which could reduce conventional energy consumption.

关 键 词：相变材料 毛细管网 辐射采暖 蓄热地板 实验研究 

分 类 号：TU111.45[建筑科学—建筑理论]