International Power Technology

James J Hamill

Dah Y Cheng

William Conlon

Ramarao Digumarthi

Chun-Nan Chang

Michael C Ryan

Chung-Nan Chang

Richard A Bitting

An improved configuration for dual fluid steam injected power generators incorporates means to bypass the steam generated by the heat recovery steam generator (HRSG) around the superheater. The bypass allows for variation in the amount of superheat added to the injection steam used by the gas turbine. In an alternative configuration, the bypass means is placed between the turbine gas outlet and the superheater gas inlet. The bypass allows the hot turbine exhaust gases to be switched between the HRSG gas inlet and the superheater gas inlet. Finally, a method for controlling the power output and amount of steam generated by a steam injected power generator is described.

Method and apparatus for bypassing the superheater in a dual fluid engine

An improved procedure for cold start-up of closed loop boiler set and Cheng cycle system wherein the venting step, the boiler swelling problem and blowdown step of the conventional start-up are eliminated by use of an external pressure source to increase the operating pressure in the evaporator section which minimizes premature phase change and accompanying volume increase.

Method and apparatus for improved start-up procedures in conventional

An improved shutdown procedure, which minimizes the potential for steam condensation in the superheater section, combustion chamber and turbines during the coast to halt of the engine maintains high temperatures until all the steam has passed through the system.

Method and apparatus for improved shutdown procedures in dual fluid

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San Jose, CA, United States of America

James J Hamill