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Method and apparatus for improving distribution of fluid in a heat exchanger

A technology of fluid distribution and heat exchangers, which is applied in the direction of indirect heat exchangers, heat exchanger types, heat exchanger shells, etc., and can solve the problems of heat exchanger efficiency reduction, uneven distribution, uneven distribution, etc.

Inactive Publication Date: 2009-09-30
CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the biphasic fluid enters a heat exchanger, such as an evaporator, condenser, gas cooler, or any other heat exchanger, the uneven distribution of the biphasic mixture in the parallel small channel tubes results in some tubes getting more liquid And the rest is to get more steam, which causes a significant decrease in the efficiency of the heat exchanger
This is known as maldistribution and is a common problem in heat exchangers utilizing parallel flow paths

Method used

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  • Method and apparatus for improving distribution of fluid in a heat exchanger
  • Method and apparatus for improving distribution of fluid in a heat exchanger
  • Method and apparatus for improving distribution of fluid in a heat exchanger

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Embodiment Construction

[0021] The present inventors have determined that non-uniform distribution in small channel or microchannel heat exchangers (such as evaporators, condensers, gas coolers, or any other heat exchangers) can be reduced by reducing the distribution of multiphase flows (such as Two-phase flow) to the parallel refrigerant flow path (such as pipes) in the inner volume of the header is reduced. Without wishing to be bound by any particular theory, it is believed that by reducing the overall internal volume of the header, the velocity and mass flow of the two-phase fluid can be increased to facilitate internal mixing, and the volume in the range where the gas and liquid phases of the two-phase flow separate Also reduced, due to these factors, a relatively even and homogeneous mixture of vapor and liquid is divided into parallel pipes. It has been determined that the shape of the insert or header advantageously reduces the internal volume of the header. The shape of the insert or heade...

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Abstract

The present invention discloses a mini-channel heat exchanger or a micro-channel heat exchanger that includes an insert (140, 240, 340, 440, 540, 640, 4, 940, 1040) having a volume. The insert is within a gap between a plurality of tubes (130, 230, 330, 430, 530, 630, 1, 930, 1030) of the mini-channel heat exchanger or the micro- channel heat exchanger and a manifold inner wall of a manifold (120, 220, 320, 420, 520, 620, 2, 920, 1020).

Description

technical field [0001] The present invention relates generally to small channel or microchannel heat exchangers, and more particularly to methods and apparatus for improving the uniformity of distribution of fluid mixtures entering the microchannels or small channel tubes of small channel or microchannel heat exchangers. Background technique [0002] In a small channel or microchannel heat exchanger (MCHX), the fluid flow is divided into many parallel pipes (loops), where each pipe or even each small channel should receive only a small and equal share of the total fluid flow . However, when a biphasic fluid enters a heat exchanger, such as an evaporator, condenser, gas cooler, or any other heat exchanger, the uneven distribution of the biphasic mixture in the parallel small channel tubes results in some tubes getting more liquid And the rest is to get more steam, which causes a significant decrease in the efficiency of the heat exchanger. This is known as maldistribution a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F9/22
CPCF28F2260/02F25B41/06F28D1/05383F25B39/028F28F9/028F28F9/0243F28F9/0273
Inventor M·B·戈尔布诺夫J·J·桑焦文尼Y·姜J·张T·D·拉德克利夫J·R·穆尼奥斯P·费尔马Y·K·朴H·比默B·迪特利M·D·福德T·麦格里维D·E·萨米尔森D·C·温特斯蒂恩
Owner CARRIER CORP