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An inner fin heat exchanger

A heat exchanger and inner shell technology, applied in the field of shell-and-tube heat exchangers and waste heat discharge heat exchangers, can solve the problems of uneven distribution of fluid, uneven pressure of heat exchange tube bundles, affecting heat exchange, etc. Circulation ability, small flow resistance, and the effect of improving heat transfer effect

Active Publication Date: 2017-11-10
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, the heat exchange tube bundle will cause uneven pressure inside the heat exchange tube bundle during the heat exchange process, resulting in uneven fluid distribution and affecting heat transfer.

Method used

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  • An inner fin heat exchanger
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Embodiment Construction

[0048] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0049] In this article, if there is no special explanation, when it comes to formulas, " / " means division, and "×" and "*" mean multiplication.

[0050] Such as figure 1 As shown, a heat exchanger includes a tube side and a shell side, and the tube side includes an inlet pipe 1, an inlet chamber 2, a heat transfer tube bundle 3, an outlet chamber 4 and an outlet pipe 5. The hot fluid enters the inlet chamber 2 from the inlet pipe 1, and passes through the heat transfer tube bundle 3, the outlet chamber 4 and the outlet pipe 5 in sequence; the shell side includes the inlet channel 6, the inner shell 7, the outer shell 8 and the outlet Channel 9, the cold fluid passes through the inlet channel 6, the space defined by the inner shell 7 and the outer shell 8, and the outlet channel 9, the inlet chamber 2, the heat transfer tube bundle 3, and ...

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Abstract

The invention provides a heat exchanger. The heat exchanger comprises a tube side and a shell side, wherein the tube side comprises an inlet tube, an inlet chamber, a heat transfer tube bundle, an outlet chamber and an outlet tube; a hot fluid enters the inlet chamber through the inlet tube and flows through the heat transfer tube bundle, the outlet chamber and the outlet tube in sequence; the shell side comprises an inlet passage, an inner shell, an outer shell and an outlet passage; and a cold fluid flows through the space defined by the inlet passage, the inner shell and the outer shell and the outlet passage in sequence. The heat exchanger is characterized in that inner fins are arranged in each heat transfer tube to divide the heat transfer tube into a plurality of small passages, and communicating holes are formed in the inner fins so that every two adjacent small passages communicate with each other. According to the heat exchanger, the inner fins are arranged in the heat transfer tube bundle to enhance heat exchange and balance internal pressure; and the pressure and heat exchange requirements of the waste heat exchanger are met through optimization of the structures of the inner fins.

Description

technical field [0001] The invention belongs to the field of heat exchangers, and relates to a shell-and-tube heat exchanger, in particular to a waste heat discharge heat exchanger with low flow resistance, compactness, higher natural circulation capacity and safety. Background technique [0002] The waste heat removal heat exchanger is the heat exchange hub of the waste heat removal system, and is an important device related to various equipment, such as the safety of reactor shutdown in nuclear reactions. At present, the third-generation nuclear power technology and marine nuclear power plant generally adopt passive waste heat removal system to further improve the inherent safety, which requires the flow resistance of the waste heat discharge cooler to be as low as possible to improve the natural circulation flow. The waste heat exhaust cooler is required to be compact and small in order to save the stack layout space. Most of the existing waste heat removal coolers are a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C15/18
CPCG21C15/18Y02E30/30
Inventor 周慧辉黄彦平徐建军唐瑜
Owner NUCLEAR POWER INSTITUTE OF CHINA
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