Heat transfer tube for evaporation with variable pore sizes

US6457516B2 · kind B2 · utility

Assignee

• WIELAND-WERKE AG · DE

Inventors

• Karine Brand · Illerrieden, DE
• Andreas Beutler · Weißenhorn, DE
• Manfred Knab · Blaustein, DE
• Gerhard Schuez · Werl, DE
• Andreas Schwitalla · Illerkirchberg, DE

Key dates

• Filing date: May 17, 2001
• Grant date: Oct 1, 2002
• Expiry date: May 17, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49391
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a heat-transfer tube, in particular an evaporator tube, with fins circumferentially extending on the shellside, which fins are shaped to essentially closed-off channels. The channels are open to the outside through pores with at least two variable sizes. In order to improve the evaporation characteristics, the invention provides advantageous regions for the ratio of the pore sizes and the ratio of the number of pores.