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High-efficiency heat exchange tube for heat exchanger in ammonia/carbon dioxide cascade refrigeration system

A carbon dioxide and cascade refrigeration technology, which is applied in the direction of tubular elements, heat exchange equipment, lighting and heating equipment, etc., can solve the problem that the ammonia/carbon dioxide cascade refrigeration system is not well applied, the heat exchange efficiency of the heat exchanger is low, Increase the volume of equipment and other issues to achieve the effect of strengthening condensation heat transfer, optimizing heat transfer efficiency, and solving the effect of bulky equipment

Inactive Publication Date: 2008-12-03
山东恒辉节能技术集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the heat exchange tubes used in domestic ammonia / carbon dioxide cascade refrigeration systems are smooth steel pipes, which lead to low heat exchange efficiency and large volume of the heat exchanger, which greatly increases the volume of equipment and wastes materials, resulting in ammonia / carbon dioxide Cascade refrigeration systems are not well applied

Method used

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  • High-efficiency heat exchange tube for heat exchanger in ammonia/carbon dioxide cascade refrigeration system
  • High-efficiency heat exchange tube for heat exchanger in ammonia/carbon dioxide cascade refrigeration system
  • High-efficiency heat exchange tube for heat exchanger in ammonia/carbon dioxide cascade refrigeration system

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Embodiment

[0021] Embodiment: a high-efficiency heat exchange tube for a heat exchanger in an ammonia / carbon dioxide cascade refrigeration system (see Fig. 1- image 3 ), which is a tubular body with an inner cavity, made of steel material. The tube body is composed of a smooth tube part 1, a finned tube part 6 and a transition part 5 connecting the smooth tube 1 and the finned tube part 6, and the outer wall of the tube part 6 is provided with spirally distributed fins along the axial direction. 2. The top of each group of spiral fins extends to both sides from the bottom, in a T-shape, the pitch of the fins is P, and P is 1.0-1.8mm. The height of the T-shaped fins is Hf, and Hf is 1-1.8mm. A channel 3 is formed between the fins. The shape of the channel 3 is duck-egg-shaped. The radius of the bottom of the channel 3 is R, and the range of R is 0.15-0.6mm, which maximizes the contact angle of the bubbles and strengthens the growth and detachment of the bubbles. The top of the adjacent f...

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Abstract

The invention relates to a heat exchanger used high-efficiency heat exchange tube in an ammonia / carbon dioxide overlapping refrigeration system. The heat exchange tube is a tube body with an inner cavity, and is characterized in that the tube body is composed of a plain tube part (1), a fin tube part (6) and a transition part (5) connecting the plain tube part (1) with the fin tube part (6); spiral fins (2) which are distributed along an axial direction of the tube body are disposed on the outer wall of the fin tube part (6); and a conduit (3) is formed between the adjacent fins (2), a space is left between the top parts of the adjacent fins (2), and spiral micro-serrations (4) are formed on the inner wall of the fin tube part (6). The heat exchange tube improves the heat transfer efficiency of the heat exchanger used heat exchange tube in the ammonia / carbon dioxide overlapping refrigeration system, reduces the system cost and allows the smaller volume of the system.

Description

Technical field: [0001] The invention relates to a high-efficiency heat exchange tube used in a heat exchanger in an ammonia / carbon dioxide cascade refrigeration system. The shell side of the heat exchanger is used for evaporation of liquid ammonia, and the tube side is used for condensation of carbon dioxide, belonging to the field of heat exchange equipment. Background technique: [0002] At present, the heat exchange tubes used in domestic ammonia / carbon dioxide cascade refrigeration systems are smooth steel pipes, which lead to low heat exchange efficiency and large volume of the heat exchanger, which greatly increases the volume of equipment and wastes materials, resulting in ammonia / carbon dioxide Cascade refrigeration systems are not well applied. Invention content: [0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a kind of ammonia / carbon dioxide that improves the heat exchange efficiency of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F1/28
Inventor 李小利于志强杨文礼王启杰邹佳君高虎丛铁军王华国
Owner 山东恒辉节能技术集团有限公司
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