基于图论的通用翅片管换热器仿真模型  

GENERAL STEADY STATE MATHEMATICAL MODEL FOR FIN-AND-TUBE HEAT EXCHANGER BASED ON GRAPH THEORY

作　　者：刘建[1] 魏文建[1] 丁国良[1] 张春路[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030

出　　处：《机械工程学报》2005年第6期233-238,共6页Journal of Mechanical Engineering

基　　金：国家重点基础规划973研究基金资助项目(G2000026309)。

摘　　要：采用图论中有向图的概念以及图的遍历搜索方法,建立了一套适用于翅片管换热器设计的通用仿真模型。该模型可以对具有任意流路布置(制冷剂流路)的翅片管式换热器稳态性能进行仿真,其中考虑了实际换热器内部通过翅片的导热换热,使仿真过程更接近于实际的换热条件。该模型与试验结果对比,平均换热和压降误差分别小于±5%和±20%,达到工程运用的要求,其运用将对紧凑翅片管换热器的设计优化具有指导意义。A general steady state and distributed parameter model of fin-and-tube heat exchanger is developed based on graph theory and traversal methods, in which the performance of fin-and-tube heat exchanger with the complex refrigerant circuitry can be predicted. With the help of the directed graph and graph-based traversal method (Breadth-first search and depth-first search), this model Canbe used to describe any flexible refrigerant circuit arrangement, and quantify the heat conduction through fins. The model is verified with the experimental results, and the average error of heat transfer and pressure drop are within ±5.0% and ±20.0%, respectively. It is concluded that the steady state model can be used as a tool to design and optimize the compact heat exchanger.

关 键 词：图论 换热器 稳态 

分 类 号：TB657[一般工业技术—制冷工程]