Simulation method for air conditioning heat exchanger

Abstract

The invention relates to a performance analysis technology of an air conditioning heat exchanger, discloses a simulation method of the air conditioning heat exchanger and solves the problems that a multi-branch heat exchanger cannot be simulated through simulation analysis of a traditional technology, a large quantity of experimental test data are required as reference and the cost is high. The method comprises steps as follows: a, heat exchange coefficients of slit fins changing with different air inlet speeds are obtained through simulating calculation, and a heat exchange coefficient function that Hfin is equal to h(Vair) is formed; b, heat exchange coefficients and pressure drop of inner grooved copper pipes changing with refrigerant mass flow and a refrigerant gas-liquid ratio are simulated, and a heat exchange coefficient function that Hpipe is equal to h(MassR, MFR) and a pressure drop function that deltaPpipe is equal to p(MassR, MFR) are formed; c, the heat exchange coefficient function Hfin of the fins, the heat exchange coefficient function Hpipe and the pressure drop function deltaPpipe of the inner grooved copper pipes are taken as thermal boundary conditions of the overall heat exchanger, corresponding initial conditions are provided, iterative computation is performed according to corresponding formulae combined with codes of secondary development of software, and the condition of convergence is realized finally through repeated iteration.

Description

technical field [0001] The invention relates to an air-conditioning heat exchanger performance analysis technology, in particular to a simulation method for the air-conditioning heat exchanger. Background technique [0002] At present, there are mainly the following methods for the simulation analysis of the heat transfer performance of tube-fin air-conditioning heat exchangers: one is the simple CFD simulation calculation method; the other is the numerical simulation method using empirical correlation; the third is the combination of the former two, Plus the business simulation software formed by software development. Here is a brief introduction to these three methods: [0003] (1) CFD simulation analysis method. Using existing commercial CFD simulation analysis software, such as ANSYS Fluent, etc., to simulate and calculate the tube-fin air-conditioning heat exchanger, there will be some simplification for the heat transfer properties of slotted fins and internal thread...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to propose a simulation method for air-conditioning heat exchangers, to solve the problems that traditional technical simulation analysis cannot simulate multi-branch heat exchangers, a large amount of experimental test data is required as a basis, and the cost is high

Images