添加相变材料对热水供暖墙板传热性能的影响研究

Study on Effect of Addition of PCM (Phase-change Material) on Heat-transfer Property of Hot Water Heating Wallboard

本文研究了相变材料在主动式储能中的应用效果,通过建立低温热水相变墙板和普通热水墙板辐射供暖实验系统,实验测试了辐射供暖相变墙板和普通墙板在间歇供暖过程中的传热性能,包括墙板表面温度和表面热流,同时利用ANSYS有限元分析软件对上述2种墙板在间歇供暖过程中的传热过程进行了数值模拟。结果显示:在供暖阶段,相变墙板表面温度和热流均小于普通墙板;在停止供暖后,相变墙板表面温度和热流下降速率明显低于普通墙板;在停止供暖期间,相变墙板表面仍然能够保持一定的热流和温度向室内供暖,室内温度没有出现较大波动;实验测试结果与数值模拟结果在大多数情况下吻合良好。本文的研究结果可为热水供暖相变墙板在建筑物中的使用提供参考和依据。

This paper studied application effect of phase change materials in active energy storage;through the establishment of radiant heating experimental system of low temperature hot water PCM wallboard and ordinary hot water phase wallboard,the experiment tested heat-transfer properties of radiant heating PCM wallboard and ordinary wallboard in the intermitting heating process, including surface temperature and surface heat flow of wallboard, and meanwhile, finite element analysis software was used for numerical simulation of heat transfer processes of the above two kinds of wallboards in the intermitting heating process. Results showed that ： during the heating phase,surface temperature and heat flow of PCM wallboard were lower than those of ordinary wallboard;after heating was stopped,decline rates of surface temperature and heat flow of PCM wallboard were significantly lower than those of ordinary wallboard; after heating was stopped,certain heat flow and temperature were still maintained at the PCM wallboard surface for indoor heating,and no greater fluctuation happened to indoor temperature; Experimental results were consistent with numerical simulation results in most cases. The results of this study can provide reference and basis for the application of hot water heating PCM wallboard in buildings.