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本文利用有机相变材料石蜡高熔化潜热,结合金属多孔纤维毡高渗透率、高导热系数的优点,搭建金属纤维毡内固-液相变强化换热实验台。研究了填充石蜡对换热的强化效果以及纤维毡孔隙率和孔径对加热面温度以及相界面位置变化的影响。结果表明,在相同的热密度下,填充石蜡可以有效强化多孔纤维毡换热,显著降低加热面温度。表面温度随孔隙率和纤维直径增加而增加。
In this paper, the high latent heat of fusion of paraffin in organic phase change material was used to combine the advantages of high permeability and high thermal conductivity of metal porous fiber mat to build the solid-liquid phase change heat transfer experimental platform of metal fiber mat. The effects of paraffin wax on heat transfer and the influence of porosity and pore size of fiber mat on the temperature of heating surface and the change of phase interface were investigated. The results show that paraffin wax can effectively enhance the heat transfer of porous fiber mat under the same heat density and significantly reduce the heating surface temperature. Surface temperature increases with porosity and fiber diameter.