定形相变储能式预制轻薄供暖地板的实验研究

关键字：定形,相变,储能式,预制,轻薄,供暖,地板

（北京建筑大学 环境与能源工程学院，北京市供热供燃气通风及空调工程重点实验室，北京  100044）

    摘要：制备了以高密度聚乙烯为支撑材料的定形相变材料，将其添加到预制轻薄干式供暖地板中，在地板采暖实验室建立实验系统，测试不同供回水平均温度及不同供回水温差下，相变地板和普通地板供暖系统的热工性能。结果显示：在稳定阶段，相变地板的表面热流密度要高于普通地板的表面热流密度，同一供回水平均温度工况下，供回水温差越大，地板表面温度越低；在冷却阶段，相变地板表面温度降低的速率很慢，而普通地板表面温度下降较快。研究结果为定形相变材料在地板中应用的可行性提供参考依据。
    关键词：定形相变材料；预制轻薄供暖地板；热流密度；地板表面温度
    中图分类号：TU832.1+6        文献标识码：A        文章编号：1001-702X（2017）08-0068-04

Experimental study on prefabricated thin heating floor utilizing shape-stabilized PCM as thermal mass
YAN Quanying，LIU Sha，WANG Suilin
（Beijing Municipality Key Lab of Heating，Gas Supply，Ventilating and Air Conditioning Engineering，College of Environmental and Energy Engineering， Beijing University of Civil Engineering and Architecture，Beijing 100044，China）

    Abstract：In this paper，a shape-stabilized phase change material（PCM） with high density polyethylene（HDPE） as supporting material was prepared，and added it to prefabricated light dry heating floor. An experimental system was built in the floor heating laboratory，and the thermal performance of the two kind of floor heating systems under different average temperature of supply and return water and different temperature difference were tested. The results show that in the stable-stage，the surface heat flux density of phase change floor is higher than that of ordinary floor，and under the same average temperature of supply and return water，the greater the temperature difference of supply and return water，the smaller the surface temperature of the floor. In the cooling stage，the rate of surface temperature reduction of phase change flooring is very slow，but the floor surface temperature of ordinary flooring decreases rapidly. The research results can provide references and basis for the application of shape-stabilized PCMs in the floor.
    Key words：shape-stabilized PCM，prefabricated light heating floor，heat flux density，floor surface temperature