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利用ANSYS有限元分析软件,模拟添加石蜡的相变水泥墙体和普通水泥墙体的传热性能。通过模拟计算,给出普通水泥墙和相变水泥墙在一侧受到热流时另一侧的表面温度和热流的变化规律,并与实验测试结果进行比较;通过对比研究相变墙体和普通墙体的传热性能,分析相变墙的节能效果和可行性;同时求解相变墙体表面恒温时间随导热系数和相变潜热的变化规律。结果显示:数值模拟结果与实验测试结果较吻合,模拟方法可行;与普通墙体相比,相变墙体的温度变化平缓,热流传递出现滞后,热流量小,节能效果较明显;提高相变材料的导热系数和潜热能提高表面恒温时间,有利于相变材料在墙体中的储能效果。
ANSYS finite element analysis software was used to simulate the heat transfer performance of paraffin-added phase change cement wall and ordinary cement wall. Through the simulation calculation, the regularity of the surface temperature and heat flux on the other side of ordinary cement wall and phase change cement wall when it is subjected to heat flow is given and compared with the experimental test results. By comparing the phase change wall and common wall Heat transfer performance of the body, the energy-saving effect and feasibility of the phase change wall are analyzed, and the change law of the constant temperature time with the thermal conductivity and the latent heat of phase change is also solved. The results show that the numerical simulation results are in good agreement with the experimental results and the simulation method is feasible. Compared with the ordinary wall, the temperature change of the phase change wall is gentle, the heat flux is delayed, the heat flux is small, and the energy saving effect is obvious. Material thermal conductivity and latent heat can improve the surface temperature constant time, is conducive to phase change material in the wall of the energy storage effect.