添加石蜡的相变水泥墙传热性能分析

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。

RESEARCH ON THE THERMAL PERFORMANCE OF THE PHASE CHANGE MATERIAL CONCRETE WALL

The thermal performances of the paraffin concrete wall and the traditional wall were analyzed by using ANSYS software.Through the simulation,the change laws of the temperature and the thermal flow of the other side of the walls when heating on one side of the walls were achieved,and compared with the experimental results.Energy-saving effect and feasibility of phase change material walls were studied by the contrasting analyze.The change laws of the constant temperature time of the PCM walls were achieved.The results showed that numerical simulation agrees well with the experimental test,so the simulation method is feasible.Compared with the traditional wall,the temperature change of PCM wall is more gently,and the thermal fluctuation is smaller,and brings delay.Raising latent heat and heat conductivity is the main way to prolong the material constant temperature time,and it is beneficial to the storage effect of the phase-change material in the wall.