CAD Of Parts Of Refrigerating Plants & Dynamic Simulation Of Automation

This paper mainly describes how to exploit CAD system of the parts ofRefrigerating Plants based on an AutoCAD second developing tool------ObjectARX.Focusing on refrigerators, I develop a refrigerator CAD system. The system implements the parametric design and drawings of many typical kinds of refrigerating parts, e. x. the plate-tube evaporator, the single back-fin evaporator and the box condenser. After analyzing the physical model and setting up the mathematical model according to the two-phase flow of adiabatic capillary tubes, it also numerically simulates and analyzes the different effects of main parameters on the capillary tube length. Based on the heat transfer analysis and counting of thermal insulation layer, the CAD system accomplishes the parametric design and drawings of the refrigerator body. The interface of the whole system is friendly and can be used conveniently.Furthermore, the paper introduces the developing method and the main functions of the dynamic simulation software for refrigerating machines, which is based on Visual Basic 6.0.