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External shell-and-tube heat exchanger and design method thereof

A technology of shell and tube heat exchanger and design method, which is applied in the direction of indirect heat exchanger, heat exchanger shell, heat exchanger type, etc., and can solve the problem of weak high pressure resistance, complicated process, and resistance of seawater to flow through plates Large and other problems, to achieve the effect of reducing resistance loss and reducing the flow field velocity gradient

Active Publication Date: 2019-09-24
CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most marine heat exchangers are shell-and-tube heat exchangers. In traditional plate and shell-and-tube heat exchangers, the process of plate heat exchangers is complicated, and the resistance of seawater to flow through the plates is relatively large. High pressure capability is not strong, prone to leakage

Method used

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  • External shell-and-tube heat exchanger and design method thereof
  • External shell-and-tube heat exchanger and design method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] D = 100mm, α = 0.45, R = 100mm, β = 0.35, assuming that the machining control accuracy is level 7, C = 5, according to the above formula

[0035] r=0.45*100+0.35*100+5=85

Embodiment 2

[0036] Embodiment 2: D = 150mm, α = 0.40, R = 200mm, β = 0.25, assuming that the processing control precision is 8 grades, C = 10, according to the above formula

[0037] r=0.40*150+0.25*200+10=120

[0038] According to the minimum curvature radius r of the variable diameter surface in the water collection chamber obtained above, the design of the shell-and-tube heat exchanger can be realized.

[0039] Such as figure 1 , figure 2 As shown, a shell-and-tube heat exchanger designed by the method of the present invention includes a shell 4 with a fresh water inlet 401 and a fresh water outlet 402, a tube sheet 3, a heat exchange tube 6 and a baffle 7, and the tube sheet 3 They are respectively installed at both ends of the shell 4, and a plurality of baffles 7 arranged at intervals are arranged radially inside the shell 4, and mounting holes are provided on each tube sheet 3 and baffles 7, and a plurality of baffles The heat exchange tubes 6 pass through the mounting holes of...

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Abstract

The invention relates to an external shell-and-tube heat exchanger and a design method thereof. The external shell-and-tube heat exchanger structurally comprises a water collection chamber, wherein one end of the water collection chamber is connected with the outer side of a tube plate to form an integrated structure; and the junction of the water collection chamber and the outer side of the tube plate is a reducing structure. According to the external shell-and-tube heat exchanger and the design method thereof, the water collection chamber of the heat exchanger is designed to be the reducing structure in smooth transition, and the water collection chamber and the heat exchanger are integrally designed; a large-opening seawater inlet-outlet is adopted for the water collection chamber, so that resistance loss caused by the sudden expansion or sudden reduction of the section of a pipeline is reduced, the flow field velocity gradient of seawater flowing into the heat exchanger is reduced, and the flowing characteristics are better met. According to the inter-side shell-and-tube heat exchanger and the design method thereof, the seawater directly passes through a tube pass, and fresh water passes through a shell pass, so that the seawater in the tube pass and the fresh water in the shell pass reversely flow, which is beneficial to heat transfer between the seawater and the fresh water.

Description

technical field [0001] The invention relates to the field of ship and submarine equipment, in particular to an inboard shell-and-tube heat exchanger used in a deep-sea artesian circulation cooling system and a design method thereof. Background technique [0002] The conventional seawater circulation scheme sets all the cooling systems inside the cabin. Although it is convenient for maintenance, large heat exchangers, circulating water pumps and other equipment will occupy the interior cabin space. Arranging heat exchangers, circulating water pumps and other equipment outboard can simplify system layout and increase cabin space. Different from conventional onshore heat exchangers, if the heat exchanger is the core component of the deep-sea artesian circulation cooling system, if it is arranged outboard, it will be beneficial to its heat exchange and will inevitably make the heat exchanger withstand high seawater back pressure . [0003] At present, most marine heat exchange...

Claims

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Application Information

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IPC IPC(8): F28D7/16F28F9/02G06F17/50
CPCF28D7/16F28F9/02G06F2119/08G06F30/17G06F2119/06
Inventor 张万良陈康仝潘夏彬周恩东
Owner CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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