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采用石蜡作为蓄热换热介质,将新型平板热管作为换热元件以强化换热,并在平板热管两侧平面添加纵向翅片,设计了一套热管式相变储热换热器实验装置,对相变蓄热换热器的蓄、放热特性进行了实验研究。测定了石蜡的温度分布随时间变化的规律;改变充、放热流体工况,分析了不同流量和流体温度对蓄放热过程的影响。通过分析发现,新型平板微热管阵列在相变蓄热器的蓄放热过程很好地发挥了强化传热元件的作用,蓄热过程中,传热流体温度越高,相变材料的熔化速率也越大;放热过程中,相同的流体温度下,随着流体流速的增大,蓄热器的放热速率逐渐增加。实验结果表明,新型平板热管蓄热器蓄放热效果良好。
Using paraffin as regenerative heat transfer medium, the new flat heat pipe is used as a heat exchange element to enhance heat exchange, and longitudinal fins are added on both sides of the flat heat pipe to design a set of experimental equipment for heat pipe phase change heat storage and heat exchanger. The phase transition heat storage heat exchanger, the exothermic characteristics of an experimental study. The law of temperature distribution of paraffin wax was determined with time. The working conditions of charge and exothermic fluids were changed, and the influence of different flow rates and fluid temperature on heat storage and storage was analyzed. Through the analysis, it is found that the new flat plate micro-heat pipe array in the phase change heat accumulator storage and storage process to play a good role in strengthening the heat transfer element, heat storage process, the higher the heat transfer fluid temperature, the phase change material melting rate The larger the heat release rate, the more the heat release rate increases with the increase of fluid velocity at the same fluid temperature. The experimental results show that the new flat heat pipe heat accumulator has good heat storage and discharge performance.