Heat exchange – With coated – roughened or polished surface
Patent
1981-07-02
1984-03-27
Cline, William R.
Heat exchange
With coated, roughened or polished surface
165179, 165184, F28F 1900
Patent
active
044388071
ABSTRACT:
A high performance heat transfer tube for use in an evaporator of a refrigeration system is disclosed. The tube has at least one helically extending fin convolution on its external surface and at least one helically extending rib on its internal surface. The fin convolution has bent over tip portions which touch the adjacent convolution to form subsurface passages at those sections of the fin convolution which are not located above an internal rib. Depressed sections of the fin convolution located above an internal rib have bent over tip portions which do not touch the adjacent convolution to form cavities. The subsurface passages and cavities form a subsurface channel having fluid communication with the surroundings of the tube through the cavity openings.
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Article by S. G. Bankoff "Entrapment of Gas in the Spreading of Liquid over a Rough Surface" vol. 4, No. 1, Mar. 1958.
Article by Peter Griffith and John D. Wallis "The Role of Surface Conditions in Nucleate Boiling" vol. 56, No. 30.
Mathur Achint P.
Shawcross James P.
Torniainen Matti J.
Adour David L.
Carrier Corporation
Cline William R.
McNally John F.
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