Cedric Chow

US Patent:

6422807, Jul 23, 2002

Filed:

Nov 28, 2000

Appl. No.:

09/726213

Inventors:

David Leach - Niskayuna NY
Iain Robertson Kellock - Clifton Park NY
Larry Wayne Plemmons - late of Hamilton OH
Cedric Chow - Schenectady NY
Brendan Francis Sexton - Clifton Park NY
Mark Stewart Schroder - Hendersonville NC

Assignee:

General Electric Company - Schenectady NY

International Classification:

F01D 1124

US Classification:

415 1, 415136, 4151732, 415175, 415176, 415178

Abstract:

A method of operating a gas turbine having inner and outer shells, with the inner shell being radially movable relative to rotor bucket tip passage in the inner shell for flowing a thermal medium. A pair of passage portions are formed in each of the aft and forward inner shell sections with axially communicating passageways between the passage portions. A thermal medium, preferably from an off-turbine site, is provided for flow through the second-stage aft inner shell section, along axial passageways along the mid-line of the inner shell to a first passage portion of the forward inner shell section. Cross-over paths flow the thermal medium from the first passage portions to second circumferentially extending passage portions of the forward inner shell section, in turn, in communication with axial passageways extending from the forward section to the aft section. A second pair of passage portions flow the thermal medium to an outlet in the aft section. By controlling the temperature of the thermal medium for flow through the aft and forward sections of the inner shell, the clearance between the shrouds and the tips of the buckets for at least the first and second stages of the turbine is controllably adjusted.

US Patent:

6804612, Oct 12, 2004

Filed:

Oct 30, 2001

Appl. No.:

10/020588

Inventors:

Cedric Chow - Rego Park NY
Kelly Crotty - Greenville SC
John Drohan - Greer SC
James Fehlberg - Simpsonville SC
Arlie Russell Martin - Simpsonville SC
Thad Morton - Greenville SC
Todd Nemec - Guilderland NY
David Pesetsky - Greenville SC
Robert Russell Priestley - Balliston Lake NY
Ming Zhou - Reading MA

Assignee:

General Electric Company - Schenectady NY

International Classification:

G06F 1900

US Classification:

702 34, 702181, 702136, 60772, 60806, 60595, 700 29

Abstract:

Automated systems for performing integrated analyses. In one embodiment, an integrated analysis system can be used to comprehensively evaluate the effects of changes in hardware configuration or operating conditions on gas turbine power plant performance and economics. The system evaluates these changes by concurrently analyzing a number of different aspects of the power plant while ensuring that the data used in each of the different analyses is consistent. These analyses can include turbine and compressor aerodynamic analysis, cooling and leakage flow analysis, heat transfer analysis, part life analysis, heat balance analysis, cost analysis and overall power plant performance and economic analysis.

US Patent:

61702633, Jan 9, 2001

Filed:

May 13, 1999

Appl. No.:

9/311098

Inventors:

Cedric Chow - Schenectady NY
Ashok Kumar Anand - Niskayuna NY
Jatila Ranasinghe - Niskayuna NY
David Andrew Stats - Clifton Park NY

Assignee:

General Electric Co. - Schenectady NY

International Classification:

F01K 2506

US Classification:

60649

Abstract:

Low grade heat recovered from various sections of an integrated gasification system is used to drive an absorption chilling cycle. In an exemplary embodiment, the recovered low grade heat is used to heat a two component working solution that is pumped through a closed cycle absorption chilling system. The heated working solution is separated into a rich stream and a lean stream. The rich stream is condensed to produce a liquid rich stream that is throttled to reduce its temperature and then evaporated to produce a cooling load. The cooling load may be used for auxiliary cooling needs in the integrated gasification system. The rich vapor stream produced by the evaporating step is mixed with the lean stream to produce a mixed stream, which is cooled in an absorber to produce the working solution for the cycle to be repeated.