【摘要】 为了研究铝翅片管对相变储能材料(PCM)传热性质的影响,通过建立模型数值模拟的方法对有翅片和无翅片的储能单元的传热性能进行了对比。研究了翅片间距(w)、铝片厚度(2v)、相变材料导热系数(kpcm)等参数对总放热时间的影响。在有翅片的情况下,储热单元凝固的时间比无翅片时减少了90%,而翅片间距和总放热时间近似呈线性关系。得出铝翅片可以大大加强相变过程传热、特别是对导热系数小于0.5W/(m.K)的PCM强化效果非常明显。更多还原

【Abstract】 In order to study the aluminum finned tube heat transfer properties of PCM,through the model and the numerical simulation method to have fins and no finned heat transfer performance of the storage unit.Study the influence of fin spacing(w)、thickness(2v)and thermal conductivity of PCM(kpcm) on total exothermic time.Comparing with a wingless energy storage unit,the solidification time reduced to 10%.The fin spacing and the total exothermic has a linear relation.The results show that aluminum fin greatly enhance the heat transfer of the phase transition process,especially the heat transfer coefficient of the PCM lower than 0.5 W/(m·K).更多还原