Siemens Westinghouse Power Corporation

Siemens Aktiengesellschaft

Siemens Energy, Inc.

Keith B McLaurin

Michael Scot Briesch

Kevin Michael Light

Christopher W Ross

Larry L Zeller

Ray L Johnson

James Cooney

Rene Echevarria

A combined cycle power unit () including a gas turbine (), a heat recovery steam generator (HRSG) () to generate steam from an exhaust flow () of the gas turbine (), and a steam turbine () driven by the steam generated from the HRSG (). Steam generated in an evaporator () in the HRSG () is conveyed through an upstream superheater stage () and a downstream superheater stage () in the HRSG (). The steam is then conveyed from the downstream superheater stage () to the steam turbine (). Between the upstream and downstream superheater stages (), the steam flow from the upstream superheater stage () is throttled to a lower pressure to form a reduced pressure steam flow prior to entering the downstream superheater stage () where the steam is reheated to an elevated temperature at the reduced pressure.

Low load turndown for combined cycle power plants

A method and system for augmenting the output of a combined cycle power plant having a gas turbine driving a generator, a heat recovery steam generator that recovers exhaust heat from the gas turbine to drive a steam turbine also driving a generator, and a refrigeration element that is powered by available energy in steam exhausted from the steam turbine to cool water. The refrigeration element employs a substantially closed cycle refrigeration system that is either an absorption chilling system or a thermal compression chilling system. The refrigeration element provides cool water to an inlet chiller arranged to chill inlet to the gas turbine to augment the power output of the gas turbine and the water is recirculated to be chilled and used again. Since the refrigeration cycle is substantially closed, little or no additional plant water consumption is imposed on the power plant.

Combined cycle power plant including a refrigeration cycle

An industrial coupling ( ) and associated methods are provided which are adapted to be positioned to connect a first shaft ( ) of a portion ( ) of an industrial system ( ) to a second shaft ( ) of a portion ( ) of an industrial system ( ) so that an industrial member ( ) having an opening formed therein and having a preselected opening diameter can be readily positioned over the coupling ( ). The industrial coupling ( ) preferably has a first coupler portion ( ) mounted to and integrally formed with the first shaft ( ) and having a first diameter less than the preselected opening diameter of the industrial member ( ) so that the industrial member ( ) can readily be positioned over the first coupler portion ( ) and onto the first shaft ( ). The industrial coupler ( ) preferably also has a second coupler portion ( ) adapted to be mounted on the first coupler portion ( ) and having a second diameter greater than the preselected opening diameter of the industrial member ( ) when mounted on the first coupler portion ( ) so that the industrial member ( ) after being positioned onto the first shaft ( ) cannot be readily positioned over the coupling ( ).

Shrunk on industrial coupling without keys for industrial system and associated methods

An axial zone block ( ) and methods of using the same are provided. The axial zone block ( ) preferably is adapted to be positioned to overlie a rotor shaft ( ) of a generator rotor ( ) and to underlie portions of a plurality of end windings ( ) and portions of at least one coil pole cross-over connector ( ) of the generator rotor ( ) to assist in forming low pressure axial zones in the rotor ( ). The axial zone block ( ) preferably includes a separate upper block portion ( ) adapted to be positioned to underlie and abuttingly contact portions of the at least one coil pole cross-over connector ( ) and portions of the plurality of end windings ( ), a separate lower inboard block portion ( ) adapted to be positioned to underlie and abuttingly contact an inboard end of the upper block portion ( ), and a separate lower outboard block portion ( ) adapted to be positioned to underlie and abuttingly contact an outboard end of the upper block portion ( ) and to be positioned adjacent and abuttingly contact an outboard end of the lower inboard block portion ( ).

Growing community of inventors

Orlando, FL, United States of America

Keith B McLaurin