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Method and tool for making enhanced heat transfer surfaces

A tool, inner surface technology, used in the field of manufacturing enhanced heat transfer surfaces, which can solve problems such as small size, blocking holes or cells, and reducing heat transfer performance of heat transfer surfaces

Active Publication Date: 2012-06-13
WIELAND WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size of the pores or cells formed by the above method is small, and impurities contained in the boiling liquid may block the pores or cells, thereby reducing the heat transfer performance of the heat transfer surface
In addition, the heat transfer properties along the heat transfer surface may vary due to the formation of voids or cells that are not uniform in size or size

Method used

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  • Method and tool for making enhanced heat transfer surfaces
  • Method and tool for making enhanced heat transfer surfaces
  • Method and tool for making enhanced heat transfer surfaces

Examples

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Embodiment Construction

[0046]It should be understood that tubes according to the invention may be used in general in any device where heat transfer from one side of the tube to the other is required, such as multiphase (both pure liquids or gases or liquid / gas mixtures) ) evaporators and condensers, but not limited thereto. While the following description provides ideal dimensions for the tubes of the present invention, the tubes of the present invention are by no means limited to these dimensions. Rather, the ideal geometry of the tube depends on a number of factors, not the least of which are the properties of the fluid flowing through the tube. Those skilled in the art will know how to vary the geometry of the inner surface of the tube in order to maximize the heat transfer of the tube used in various equipment and with various fluids. Also, although in the drawings the heat transfer surface is formed on the inner surface of the tube, it should be understood that the heat transfer surface is als...

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Abstract

The invention relates to enhanced heat transfer surfaces and methods and tools for making enhanced heat transfer surface. Certain embodiments include a boiling surface that include a plurality of primary grooves, protrusions and secondary grooves to form boiling cavities. The boiling surface may be formed by using a tool for cutting the inner surface of a tube. The tool has a tool axis and at least one tip with a cutting edge and a lifting edge. Methods for making a boiling surface are also disclosed, including cutting through the inner surface of a tube to form primary grooves, then cutting and lifting the inner surface to form protrusions and secondary grooves.

Description

technical field [0001] The present invention relates generally to enhanced heat transfer surfaces and a method and tool for making enhanced heat transfer surfaces. Background technique [0002] The present invention relates to enhanced heat transfer surfaces that facilitate heat transfer from one side of the surface to the other. Heat transfer surfaces are commonly used in equipment such as flooded evaporators, falling film evaporators, spray evaporators, absorption refrigerators, condensers used in the refrigeration, chemical, petrochemical and food processing industries , direct expansion coolers and single phase coolers and heaters. The variety of heat transfer media used in these applications includes, but is not limited to: pure water, water glycol mixtures, refrigerants of any type (e.g. R-22, R-134a, R-123, etc.), ammonia, petrochemical liquids and other mixtures. [0003] Some types of heat transfer surfaces work by a liquid absorbing heat and undergoing a phase c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F1/40B23P15/26B21C37/20F28FF28F13/18
CPCB21C37/20F28F13/187B21J5/068F28F1/40F28F1/00
Inventor P·托尔斯N·佐布科夫
Owner WIELAND WERKE AG