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Värmeväxlarvägg anordnad med en tunn, hålförsedd metallfolie för att förbättra värmeövergången vid kokning respektive kondensation: [Heat transfer element]
1986 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

A heat exchanger wall incorporates a partition wall (11-12), one side of which is in contact with a heat exchange medium. A mechanically stable part (11) of the partition wall (11-12) has provided on one surface thereof a thin metal foil (12), which is provided with a large number of small through-passing holes (121) and which is attached directly to the said part (11), such as to form a minute gap (13) between the foil and the mechanically stable part. According to one embodiment the element comprises a tube (11) and the foil has provided therein a longitudinally extending slot (122) and/or a plurality of folds or bends (31, 32) directed towards the stable part (11), and/or a fold or bend (51) facing away from the stable part (11). In addition to occurring through the intrinsic rigidity of the foil, the thin gap is formed by providing one side of the foil (12) with a rough or irregular structure, or by forming the holes in the foil in a manner such as to leave burrs around the defining edges of the holes, or by providing in the foil a number of folds or bends (31, 32) which face towards the mechanically stable part.

Place, publisher, year, edition, pages
1986.
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-83653OAI: oai:DiVA.org:kth-83653DiVA: diva2:498882
Patent
SE 453010B (1988-04-14)
Note

US 4787441 A (1988-11-29); DE 3761860 D1 (1990-04-12)

Available from: 2012-02-12 Created: 2012-02-12 Last updated: 2015-01-23Bibliographically approved

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Palm, Björn

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