Heat transfer tube and a method of fabrication thereof

US6913073B2 · kind B2 · utility

Assignee

• WIELAND-WERKE AG · DE

Inventors

• Andreas Beutler · Weißenhorn, DE
• Manfred Knab · Blaustein, DE
• Andreas Knoepfler · Ulm, DE
• Axel Kriegsmann · Ulm, DE
• Klaus Menze · Ulm, DE
• Gerhard Schuez · Werl, DE
• Andreas Schwitalla · Illerkirchberg, DE

Key dates

• Filing date: Jan 9, 2002
• Grant date: Jul 5, 2005
• Expiry date: Jan 9, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49385
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A metallic heat transfer tube, in particular for the evaporation of liquids from pure substances or mixtures on the outside of the tube. Fins are integrally formed on the outside of the tube. Recesses are arranged in the area of the base of the primary grooves and extend between the fins. The recesses are in the form of re-entrant secondary grooves. The mechanical stability of the tube is not negatively influenced because material is primarily removed from the fin flanks toward the base of the groove so that the re-entrant secondary grooves are radially open.