椭圆管强化多管蓄热器的数值模拟  

Numerical Simulation of Elliptical Tube Enhanced Multi-Tube Heat Accumulator

作　　者：高杨 何烨 许玲 周艳[1] GAO Yang;HE Ye;XU Ling;ZHOU Yan(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061

出　　处：《青岛科技大学学报（自然科学版）》2023年第1期95-101,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51176080)。

摘　　要：针对多管式相变蓄热器模型,运用CFD技术对相同横截面积的圆管、椭圆管外的1.5%石墨烯/石蜡复合相变材料的熔化、凝固过程进行仿真。在考虑自然对流的情况下,模拟结果表明:椭圆管的换热综合性能高于圆管;当内管中水的流速相同时,椭圆管的蓄放热效率分别比圆管高12.96%和9.20%。For the multi-tube phase change heat accumulator model, the CFD technology is used to simulate the melting and solidification process of the 1.5% graphene/paraffin composite phase change material outside the round tube and the elliptical tube with the same cross-sectional area. Considering natural convection, the simulation results show that the overall heat transfer performance of the elliptical tube is higher than that of the round tube;when the flow rate of the water in the inner tube is the same, the heat storage and release efficiency of the elliptical tube is 12.96% and 9.20% higher than that of the round tube, respectively.

关 键 词：多管蓄热器 复合相变材料 蓄放热 椭圆管 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]