Patent · US Expired

Method of operating a steam power station

US6233939A · kind A · utility

9Cited by

6References

8Claims

0Family size

Assignee

ABB PATENT GMBH · DE

Inventors

Ung-Lap Ngo-Beelmann · Karlsruhe, DE
Klaus Behnke · Schriesheim, DE
Michael Witt · Ahrensburg, DE

Key dates

Filing date	May 30, 2000
Grant date	May 22, 2001
Priority date	—
Expiry date	May 30, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/50
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In a steam power station, the condensate used as feedwater is preheated up close to the boiling temperature by means of partial steam mass flows from the turbine steam quantity. Due to the steam extraction, the following steam-turbine stages can draw less power from the steam fluid. To avoid the reduction in the power output at the following steam-turbine stages, provision is made for the waste heat from fuel cells to be used for preheating the condensate. Due to the preheating of the feedwater from the waste heat of the fuel cells and the associated increase in the steam quantity participating in the expansion, an increase in the efficiency of the steam process is achieved.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.