Abgassystem für Dampfturbine

Details

Veröffentlichungs-Nr.

EP2476868

Aktenzeichen

EP12150871

Anmeldetag

12. Januar 2012

Veröffentlichung

6. November 2019

Erteilung

6. November 2019

Rechtsraum

EP

IPC

F01D25/30F01D25/24

Abstract

An exhaust system for a steam turbine provided with an improved annular flow guide in a high pressure or intermediate pressure turbine. The improved flow guide reduces flow turbulence in an exhaust hood and reduces pressure loss to thereby improve turbine plant efficiency. The shape (vertically symmetric) of a flow guide 5A according to a conventional technology was modified into the shape (vertically asymmetric) of a flow guide 5 such that the length of a downstream flow guide portion 5d is greater than that of a upstream flow guide portion 5u. Numerical analyses were performed to find the optimum flow guide occupation ratio of the conventional technology and the corresponding total pressure loss coefficient. The obtained values were used as reference values. Further, the flow guide occupation ratio of the upstream flow guide portion 5u was set at 0.4 and the flow guide occupation ratio of the downstream flow guide portion 5d was set at 0.7; at values where the total pressure loss coefficient becomes lower than the reference value. The rectification effect of the flow guide can thus be enhanced.

Anmelder

Firmen

Mitsubishi Hitachi Power Systems, Ltd.
Hitachi Ltd.

Land

🇯🇵 Japan

Fachgebiete