带有内肋片相变蓄能换热器的数值分析  

Numerical Study on Characteristics of a New Latent Heat Storage Exchanger with Internal Fins

作　　者：刘倩平[1] 丁京伟[2] 齐承英[1] 杨历[1] 

机构地区：[1]河北工业大学能源与环境工程学院,天津300401 [2]中国汽车技术研究中心汽车试验研究所,天津300162

出　　处：《河北工业大学学报》2009年第5期56-59,共4页Journal of Hebei University of Technology

基　　金：河北省热能重点学科资金(E2008000063)

摘　　要：介绍了一种新型带内肋片的相变蓄能换热器,利用Fluent 6.2软件研究了相变材料的融化和凝固过程,研究了不同相变层厚度,不同温度差和不同入口速度等多种工况的蓄热过程,并讨论了固液相变界面的形状、总的凝固时间、热流等物理量之间的关系.研究结果表明:热媒体(水)的温度和相变材料相变点之间的温差越大,肋片的间距越小,热媒体(水)的流速越大,所需要的融化时间越短,传热效果会越好.The article presents a new kind of phase change heat storage exchanger with internal fins. In the present work, Fluent 6.2 software was used to study the melting process of the phase change material. Many conditions about thickness of the PCM layer, temperature difference and inlet velocity were investigated. Graphical results including solid-liquid interface location, total solidification time, wall surface heat flux are presented and discussed. The results demonstrated that the larger is the temperature difference, the smaller thickness of the PCM layer, the higher of the velocity of the water, then the shorter is the melting time, and the better is the effect of the heat transfer.

关 键 词：相变 蓄能 节能 肋片 潜热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]