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用石蜡混合物(以C_(19)H_(40)为主体,相变温度:25~38℃,比热容极大值出现在31.5℃左右)作芯材,树脂材料作囊壁,与水混合制备成微纳米胶囊流体,将其填充在矩形密闭容器内,在下表面加热,其余各表面绝热条件下,对相变材料相变化过程的储热蓄热特性进行分析。结果表明,相变材料相变化过程提前了自然对流的启动时间,加强了换热强度;在蓄热温度超过35℃之前,相变化的促进作用随温度增加而逐渐增强,超过35℃以后,相变化的促进作用开始减弱.
With paraffin mixture (C_ (19) H_ (40) as the main phase transition temperature: 25 ~ 38 ℃, the maximum specific heat capacity at about 31.5 ℃) as the core material, the resin material for the wall, mixed with water prepared The microcapsule capsule fluid was filled in a rectangular closed container and heated on the lower surface. The heat storage and heat storage characteristics of the phase change material under the adiabatic conditions of other surfaces were analyzed. The results show that the phase transition of phase change material advances the start time of natural convection and enhances the heat transfer intensity. When the storage temperature exceeds 35 ℃, the accelerating effect of phase transformation gradually increases with the increase of temperature. When the temperature exceeds 35 ℃, The promotion of change began to diminish.