Method and device for determining the enthalpy of wet steam

US6643605B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hans-Joachim Endries · Essen, DE
• Helmut Herbig · Bad Hersfeld, DE
• Hans Kramer · Hersbruck, DE

Key dates

• Filing date: Mar 24, 2000
• Grant date: Nov 4, 2003
• Expiry date: Mar 24, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N25/60
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and a device for determining an enthalpy of wet steam, in particular of wet steam at an outlet of a steam turbine. A part volume flow of the wet steam is mixed with a reference gas to form a mixture, so that the liquid constituents of the part volume flow evaporate completely. An enthalpy of the reference gas and an enthalpy of the mixture is then determined by measured physical variables and an enthalpy of the wet steam is calculated from these enthalpies.