低温热水辐射供暖相变墙板传热特性影响因素的研究

Research on Factors Influencing Heat Transfer Characteristics of Phase Change Wallboard with Low Temperature Hot Water Radiant Heating

本文建立了添加相变材料的热水辐射供暖墙板的物理模型和数学模型,利用ANSYS软件对相变墙板在不同影响因素下的传热过程进行了数值模拟,并对热水辐射供暖相变墙板进行了优化设计。结果显示:室内空气温度对热水辐射供暖相变墙板散热特性的影响最为明显,但室内空气温度过高对相变墙板间歇供暖不利;在墙板中加入相变材料,可增加围护结构的热惰性,减小室温和热流的波动;热水辐射供暖相变墙板中的管间距不宜取的过大。研究结果可为热水辐射相变墙板供暖系统的优化提供参考和依据。

In this paper,a physical model and mathematical model for hot water radiant heating wallboard added with phase change materials were established. The numerical simulation for the heat transfer process of phase change wallboard under different influencing factors was performed through ANSYS software, and the design for phase change wallboard with hot water heating was optimized. The results shown that indoor air temperature presented the most apparent influence on heat dissipation characteristics of phase change wallboard with hot water heating, but too high indoor air temperature was unfavorable for intermit heating of hot water phase change wallboard. Furthermore, phase change material added in wallboard could increase the thermal inertia of building envelope and reduce the fluctuation of indoor air temperature and heat flow. In addition, tube spacing in hot water phase change wallboard should not be too large. The research results could provide reference and basis for optimizing heating system of hot water phase change wallboard.