椭圆管强化固液相变蓄热器的数值模拟  

The numerical simulation of elliptical tube strengthening the solid-liquid phase change accumulator

作　　者：徐家慧[1] 陈贵军[1] 

机构地区：[1]大连理工大学能源与动力学院,辽宁大连116024

出　　处：《节能》2016年第7期14-18,2,共5页Energy Conservation

摘　　要：由于蓄热材料融化后受自然对流的影响,为了改善固液相变蓄热器上下融化不均的情况,采用椭圆管强化蓄热器中的传热,利用Fluent软件模拟了相同面积的圆管和椭圆管这2种结构中石蜡相变的融化过程,得到了石蜡融化过程温度场分布及融化过程中液相分数线的规律,根据这些规律分析了椭圆管对增强蓄能效果的影响,并且分析了不同椭圆管长短半轴比对加快石蜡蓄热时间的影响。Taking into account the natural convection of phase-change material( PCM) in liquid region. In order to improve the melting irregularity of solid-liquid phase change accumulator,using the elliptical tube to enhance heat transfer of accumulator. The application of the solidification / melting model in FLUENT simulates paraffin melting by the two same area structure of circular tube and elliptical tube. Temperature field distribution and the lawof melting fractional line of the paraffin wax is obtained. According to these laws,analyzing the elliptical tube' influence on enhance the effect of energy storage,and the influence of the elliptical tube with different axis radio on heat storage time is analyzed.

关 键 词：相变蓄热 椭圆管 强化传热 数值模拟 

分 类 号：TK112[动力工程及工程热物理—热能工程]