将定形相变材料加入到预制定位板中制备了一种预制轻薄相变供暖地板,考察了不同供回水温度下相变地板的热工性能,同时利用ANSYS软件对其进行数值模拟,得出地板表面温度、热流密度随不同供回水温度的变化规律及拟合关系式,对比分析实验值和模拟值,计算得出误差率及平均修正系数;对该相变供暖地板进行间歇供暖的数值模拟,考察在不同间歇时间下地板表面平均温度和平均热流的变化情况,为相变辐射采暖在实际工程中的应用提供参考。
A kind of prefabricated thin phase change heating floor was prepared by adding the shape-stabilized phase change material(PCM)into the prefabricated positioning plate,its thermal performance at different average temperature of supply and return water was tested.The numerical simulation was carried out by ANSYS software.The variation law and fitting relationship of surface temperature and heat flux with different average temperature of supply and return water were obtained.By comparing the experimental and simulated values,the error rate and the average correction factor were calculated.The average temperature and the average heat flux of floor surface under different intermittent time were obtained by simulating the phase change heating floor for intermittent heating.The results can provide reference for the application of phase change radiation heating in practical engineering.
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基金资助
北京市自然科学基金(3122012);北京市教委科技创新能力提升计划项目(PXM2016-014210-000016)
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