一种通用的制冷剂-空气换热器三维分布参数仿真设计工具.PDFVIP

一种通用的制冷剂-空气换热器三维分布参数仿真设计工具 任滔 丁国良 王婷婷 (上海交通大学制冷与低温工程研究所，上海，200240) 摘 要 为了满足采用同一仿真工具对制冷系统中常用的不同类型的换热器进行仿真，本文开发了一种 通用的制冷剂-空气换热器三维分布参数模型，并据此开发了具有3D 交互式图形界面的换热器仿真设计工 具HXSIM 。HXSIM 采用一种统一的仿真框架对换热器进行模拟，并将不同类型的换热器划分为三类控制 单元，分别是翅片管型控制单元，丝管式控制单元和板管式控制单元。三类控制单元均包括三个对象：制 冷剂，空气和管翅（板）。本文根据上述三个对象的结构特点和传热特性，建立了相应的控制方程。为了 便于用户使用，在HXSIM 中采用OpenGL 技术开发了界面友好的3D 交互式图形界面。HXSIM 对不同类 型的换热器都有较高的仿真精度，实验验证表明其换热量的最大预测误差小于10%，空气侧压降的最大预 测误差小于1.16 Pa。 关键词 换热器 仿真 冰箱 空调 模型 A GENERAL 3D DISTRIBUTED-PARAMETER SIMULATION TOOL FOR AIR-TO-REFRIGERANT HEAT EXCHANGERS Ren Tao Ding Guoliang Wang Tingting (Institute of Refrigeration and Cryogenics, Shanghai Jiaotong University, Shanghai 200040) Abstract In order to meet a requirement of simulating different types of heat exchangers which are widely used in refrigerating system by a simulation tool, a general 3D distributed-parameter simulation tool, HXSIM, is introduced. A general simulation framework was adopted to establish a general purpose solver. With the help of control volume method, all types of heat exchangers can be divided into three types, which are fin-tube control volume, wire-tube control volume and plate-tube control volume. There exists three objects in each control volume, which are refrigerant, air and tube fin (tube wire or tube plate), and the governing equations for each object are established according to its heat transfer and pressure drop characteristic. OpenGL was applied in building an interactive graphic user-friendly interface, and in developing HXSIM to facilitate a modular, highly flexible and customized simulation tool. The model prediction with HXSIM ware verified against experimental data, which shows the maximum deviation for heat exchange capacity