Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multichannel heat exchanger flow distribution prediction method

A flow distribution and prediction method technology, applied in the field of heat exchanger design, can solve problems such as deviation

Active Publication Date: 2020-08-28
XI AN JIAOTONG UNIV
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As for the local hydraulic loss, only relatively rough empirical constants or empirical formulas can be used to estimate the local loss coefficient. Because it is difficult to reflect the influence of the complex flow field at the inlet and outlet of the actual heat exchanger on the local loss, it often has a large deviation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multichannel heat exchanger flow distribution prediction method
  • Multichannel heat exchanger flow distribution prediction method
  • Multichannel heat exchanger flow distribution prediction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] Provide the embodiment of the present invention below, Figure 4 In the multi-channel heat exchanger shown, the fluid on one side flows through the inlet pipe successively and enters the inlet head cavity, and then splits to each heat exchange channel, exchanges heat in the heat exchange core, and then converges to the outlet head cavity , and finally enters the outlet pipe and flows out of the heat exchanger. Its heat exchange channels are arranged in 8×4. Considering the symmetry, in the CFD calculation, it can be simplified by taking a quarter of it and then taking the symmetrical boundary treatment. Follow the steps below to Figure 4 The flow distribution of the multi-pass heat exchanger shown is predicted by:

[0048] 1) Determine if Figure 4 The shown multi-channel heat exchanger core channel and inlet and outlet structure, determine the geometric parameters;

[0049] 2) Use Solidworks to establish such as Figure 5 The geometric model of the inlet part of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a multichannel heat exchanger flow distribution prediction method based on computational fluid dynamics (CFD), an artificial neural network and a hydraulic loss network model.Aiming at any multi-channel heat exchanger, the multi-channel heat exchanger is divided into an inlet part, a heat exchange core body and an outlet part, a hydraulic loss network is established, andhydraulic loss of each channel comprises inlet local loss, on-way resistance loss and outlet local loss. The internal on-way loss of the channel is predicted through an empirical correlation; obtaining import and export local loss coefficient sample data through a CFD method. An import and export local loss coefficient prediction model is established through an artificial neural network. The initial flow distribution is given. The total hydraulic loss prediction values of all the channels are consistent through iterative computation, and then the flow distribution can be determined. Accordingto the prediction method, the flow distribution of the multi-channel heat exchanger under different working conditions can be accurately and efficiently predicted, the flow non-uniformity is effectively evaluated, and reference is provided for engineering application.

Description

technical field [0001] The invention belongs to the field of heat exchanger design, and in particular relates to a flow distribution prediction method of a multi-channel heat exchanger. Background technique [0002] The problem of flow distribution uniformity is common in multi-channel heat exchangers. Existing studies have shown that uneven flow distribution will have a significant negative impact on heat exchanger performance and should be avoided as much as possible. Therefore, it is of great significance to accurately and efficiently predict the flow distribution in multi-channel heat exchangers and evaluate the uniformity of flow distribution for the design and optimization of multi-channel heat exchangers. [0003] Since the prediction of the flow distribution involves the flow field information inside the heat exchanger, it is difficult to study it directly through experiments. In recent years, numerical simulation based on computational fluid dynamics (Computationa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F30/17G06F30/28G06F30/27G06N3/04G06N3/08G06N3/12G06F113/08G06F119/14
CPCG06F30/17G06F30/28G06F30/27G06N3/084G06N3/126G06F2113/08G06F2119/14G06N3/045
Inventor 王秋旺石昊宁马挺
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com