Design method of general combination pipe diameter air conditioner heat exchange equipment fluid passage

A technology of heat exchange equipment and design method, applied in lighting and heating equipment, household heating, heating methods, etc., can solve the problems of low efficiency, long cycle and high cost

Active Publication Date: 2014-01-29
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of traditional test methods has long cycle, low efficiency and high cost

Method used

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  • Design method of general combination pipe diameter air conditioner heat exchange equipment fluid passage
  • Design method of general combination pipe diameter air conditioner heat exchange equipment fluid passage
  • Design method of general combination pipe diameter air conditioner heat exchange equipment fluid passage

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Experimental program
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Effect test

Embodiment Construction

[0121] Design method step of the present invention is as follows:

[0122]1) Determine the heat load and pump power of the heat exchanger according to actual needs.

[0123] 2) Determine the structural parameters

[0124] According to the type and installation method of air-conditioning heat exchange, the overall physical model of the heat exchanger is established with reference to the geometric structure of the air-conditioning heat exchanger that needs to be optimally designed. The required parameters are as follows.

[0125] (1) The overall parameters of the heat exchanger

[0126] Type of heat exchanger (evaporator, condenser); inclination angle of heat exchanger arrangement (0-90°); type of tube row (sequent row, fork row); if the type of tube row is fork row, the specific arrangement method must be determined ( Odd number row high position, even number row high position).

[0127] (2) Heat exchange tube parameters

[0128] Length of heat exchange tubes; number of tu...

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Abstract

The invention discloses a design method of a general combination pipe diameter air conditioner heat exchange equipment fluid passage. Firstly, a proper combination pipe diameter air conditioner heat exchanger type and a proper installation manner are selected, and a general heat exchanger physical model is set up by referring to the geometric construction parameters and the using conditions of a combination pipe diameter air conditioner heat exchanger; secondly, grid division is performed on a heat exchanger based on the heat exchanger model, and calculation models of different pipe diameter fluid passage connection networks of the heat exchanger of the type are achieved according to different configuration of the fluid passage of a pipe-diameter-changing heat exchanger; thirdly, a method for accurately positioning a phase change interface of a working medium in a pipe to be changed into two phases from a single phase and into the single phase from the two phases is designed; finally, based on correction of flowing of the single phase and the two phases and a heat exchange correlation formula of the side provided with a plurality of fins and the inner side of the pipe, the flowing and heat exchange performances of the fin side of the combination pipe diameter air conditioner heat exchanger and the temperature, the pressure, the dryness and the heat exchange performance of any position on the fluid passage of the inner side of the pipe are obtained through the iterative computation.

Description

technical field [0001] The invention relates to a design method of a heat exchanger, in particular to a design method of a flow path of a general-purpose combined-diameter air-conditioning heat exchange equipment. Background technique [0002] In recent years, affected by the requirements of reducing costs, reducing energy consumption, environmental protection and low carbon in the field of household appliances, the development and application of combined-diameter household air conditioners have attracted more and more attention. Combined tube diameter refers to the use of two or more heat exchange tubes with different tube diameters in the two air conditioners (condenser and evaporator), mainly the combination of conventional large and small tube diameters. The small pipe diameter is smaller than the pipe diameter (such as 7-10mm) of the general household air-conditioning heat exchanger. At present, the development of small pipe diameters in China mostly uses 4-5mm plain pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/02F25B39/04F24F13/30
Inventor 何雅玲王煜李明佳陶文铨
Owner XI AN JIAOTONG UNIV
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