Evaporator foil stack

US6536515B2 · kind B2 · utility

Assignee

• BALLARD POWER SYSTEMS INC. · US

Inventors

• Oliver Freitag · Tauberbischofsheim, DE
• Alois Tischler · Dorfen, DE

Key dates

• Filing date: Mar 19, 2001
• Grant date: Mar 25, 2003
• Expiry date: Mar 19, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F28D9/0031
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

An evaporator stack, in particular for a double evaporator, includes foils for converting a liquid medium into a gaseous medium. The foil stack has at least one foil through which a medium flows and at least one additional foil. The foil stack has an inlet region for the liquid medium and a discharge region for the gaseous medium. The discharge region is designed such that a pressure gradient in the medium over the at least approximately entire width of the discharge region is smaller than a pressure gradient in the medium over the at least approximately entire length of the media foil through which flow occurs.