Resumes
Resumes
Jatila Ranasinghe
View pageLocation:
3 Maple Brook Ct, Simpsonville, SC 29681
Jatila Ranasinghe Phones & Addresses
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41 Tipperary Way, Ballston Lake, NY 12019 (518) 406-5212
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La Palma, CA
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Clifton Park, NY
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Charleston, SC
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3 Maple Brook Ct, Simpsonville, SC 29681 (864) 967-8699
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Scotia, NY
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Granada Hills, CA
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3 Maple Brook Ct, Simpsonville, SC 29681
Work
Position:
Professional/Technical
Education
Degree:
Graduate or professional degree
Publications
Us Patents
Method For Kalina Combined Cycle Power Plant With District Heating Capability
View pageUS Patent:
6347520, Feb 19, 2002
Filed:
Feb 6, 2001
Appl. No.:
09/778016
Inventors:
Jatila Ranasinghe - Niskayuna NY
Raub Warfield Smith - Ballston Lake NY
Robert William Bjorge - Highland CA
Raub Warfield Smith - Ballston Lake NY
Robert William Bjorge - Highland CA
Assignee:
General Electric Company - Schenectady NY
International Classification:
F01K 2506
US Classification:
60649, 60651, 60653, 60671, 60 3904, 60 39182
Abstract:
A method is provided for implementing a thermodynamic cycle with district water heating capabilities that combines a simplified Kalina bottoming cycle with a district water heating plant. The preferred method includes pressurizing, vaporizing and superheating a mixture working fluid (e. g. , H O/NH ) using gas turbine exhaust energy in a heat recovery vapor generator, expanding the working fluid in a turbine to produce power, and then transferring the working fluid thermal energy to the district water by condensing the working fluid in a single stage condenser. The method can also include systems that efficiently use excess thermal energy only when the district water heating demand is low, e. g. , during summer months. The method according to the invention provides for economically significant increases in district water heating efficiency as compared to conventional Rankine cycles with district water heating, while decreasing the cost of both the Rankine and nominal Kalina cycles using multi-component working fluids.
Steam Generation System And Method For Gas Turbine Power Augmentation
View pageUS Patent:
6357218, Mar 19, 2002
Filed:
Jun 20, 2001
Appl. No.:
09/681877
Inventors:
Jatila Ranasinghe - Niskayuna NY
Charles Michael Jones - Ballston Lake NY
Robert Russell Priestley - Ballston Lake NY
Charles Michael Jones - Ballston Lake NY
Robert Russell Priestley - Ballston Lake NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F02G 300
US Classification:
60 3905, 60 3907, 60 39182
Abstract:
A heat rejection system is provided in a recirculating flow line, so that the steam production rate can be controlled from no steam production to maximum steam production for the gas turbine operating condition. For maximum steam production, the heat exchanger of the heat rejection system is bypassed so all the water is directed to the heat recovery unit (HRU). When no steam production is desired, all or a majority of the water is directed to the heat exchanger such that the heat absorbed in the HRU evaporator is equal to the heat rejected by the air cooled heat exchanger. Adjusting the flow split between these two limits allows the steam production rate to vary from no production to the maximum steam production capability corresponding to the gas turbine operating point.
Fuel Gas Moisturization Control System For Start-Up, High Load Operation And Shutdown
View pageUS Patent:
6370880, Apr 16, 2002
Filed:
Nov 9, 2000
Appl. No.:
09/711173
Inventors:
Raub Warfield Smith - Ballston Lake NY
Jatila Ranasinghe - Niskayuna NY
William George Carberg - Saratoga Springs NY
Jatila Ranasinghe - Niskayuna NY
William George Carberg - Saratoga Springs NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F02G 300
US Classification:
60775, 60778, 60790, 60 3953
Abstract:
Transient conditions, such as startup, shutdown, and contingencies, in gas turbine power plants are difficult to manage; oftentimes in designs employing a fuel moisturization system, such conditions require the use of backup fuel or a temporary fuel stream flare. The present invention enables the use of cold, dry fuel during startup and smoothly transitions to the use of moisturized, superheated fuel at high load without using a backup fuel. A bypass line allows fuel to enter a fuel superheater without passing through a fuel saturator. This enables the independent operation of the fuel superheater from the fuel saturator. Additionally, dry fuel is heated in the fuel superheater before moisturized fuel enters the fuel superheater. Gradually, a transition from dry fuel to moisturized fuel occurs before the gas turbine system operates at premixed combustion mode of operation.
Method And Apparatus For Fuel Gas Moisturization And Heating
View pageUS Patent:
6389794, May 21, 2002
Filed:
Apr 10, 2001
Appl. No.:
09/829437
Inventors:
Jatila Ranasinghe - Niskayuna NY
Raub Warfield Smith - Ballston Lake NY
Raub Warfield Smith - Ballston Lake NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F02G 300
US Classification:
60 3905, 60 39182, 60 3959, 60736
Abstract:
Fuel gas is saturated with water heated with a heat recovery steam generator heat source. The heat source is preferably a water heating section downstream of the lower pressure evaporator to provide better temperature matching between the hot and cold heat exchange streams in that portion of the heat recovery steam generator. The increased gas mass flow due to the addition of moisture results in increased power output from the gas and steam turbines. Fuel gas saturation is followed by superheating the fuel, preferably with bottom cycle heat sources, resulting in a larger thermal efficiency gain compared to current fuel heating methods. There is a gain in power output compared to no fuel heating, even when heating the fuel to above the LP steam temperature.
Gas Turbine Power Augmentation Injection System And Related Method
View pageUS Patent:
6405521, Jun 18, 2002
Filed:
May 23, 2001
Appl. No.:
09/681700
Inventors:
Jatila Ranasinghe - Niskayuna NY
Walter Phillip Jones - Schenectady NY
Walter Phillip Jones - Schenectady NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F02G 300
US Classification:
60 3905, 60 3906, 60 39182
Abstract:
A method of augmenting power in a gas turbine plant that includes a compressor, at least one combustor, a turbine component and an output shaft, comprising a) supplying air and water to a heat recovery boiler; b) providing a turbine controller that controls supply of air, steam or a mixture of air and steam to the combustor; c) storing data in the turbine controller including properties of air, steam and equations for determining properties of any mixture of air and steam; d) measuring a differential pressure of the air, steam or mixture of air and steam across a metering tube located upstream of the combustor; e) determining instantaneously the mass flow rate of the air, steam or mixture of air and steam as a function of said differential pressure and desired power output; and f) supplying the air, steam or mixture of air and steam to the combustor at the flow rate determined in step e); wherein step f) is carried out with a control valve downstream of the metering tube, the control valve operatively connected to the turbine controller.
Cooling Air System And Method For Combined Cycle Power Plants
View pageUS Patent:
6412285, Jul 2, 2002
Filed:
Jun 20, 2001
Appl. No.:
09/681868
Inventors:
Jatila Ranasinghe - Niskayuna NY
William George Carberg - Saratoga Springs NY
William George Carberg - Saratoga Springs NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F02C 608
US Classification:
60782, 60 39182, 60806
Abstract:
A cooled cooling air (CCA) system is provided for application with gas turbine cycles. In an embodiment of the invention, the CCA system includes a shell and tube heat exchanger in which water flow is provided inside the tube(s) and air flow is provided on the shell side. Water exiting the heat exchanger is partially evaporated. Accordingly, the resulting two phase water/steam flow is admitted to a separator where the steam and water are separated. The saturated steam is flowed to the HRSG whereas the separator water is recycled to the heat exchanger.
Steam Injection And Inlet Fogging In A Gas Turbine Power Cycle And Related Method
View pageUS Patent:
6446440, Sep 10, 2002
Filed:
Sep 15, 2000
Appl. No.:
09/662779
Inventors:
Jatila Ranasinghe - Niskayuna NY
Charles Michael Jones - Ballston Lake NY
Robert Russell Priestley - Ballston Lake NY
Charles Michael Jones - Ballston Lake NY
Robert Russell Priestley - Ballston Lake NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F02C 330
US Classification:
60775, 60 3953
Abstract:
A steam injection and inlet fogging system is provided for a gas turbine power plant that includes a gas turbine having a compressor, a combustor and a turbine for driving a generator. A waste heat recovery unit is arranged to receive exhaust gas from the turbine, the former having a plurality of heat exchange sections for heating water with the exhaust gas. A flash tank is arranged to receive heated water from the waste heat recovery unit for producing steam. A first stream of makeup water from a first of the plurality of heat exchange sections is flashed to the flash tank to also produce saturated steam and water at a first location in the flash tank. A second stream of water from a second of the plurality of heat exchange sections is also flashed to the flash tank to produce saturated steam and water at a second location in the flash tank. A portion of the saturated steam produced in the flash tank is supplied to the gas turbine combustor, and a remaining portion of the saturated steam is supplied to the compressor via an inlet fogger. The system also controls contaminants in the water produced in the flash tank.
Method And Apparatus For Fuel Gas Heating In Combined Cycle Power Plants
View pageUS Patent:
6499302, Dec 31, 2002
Filed:
Jun 29, 2001
Appl. No.:
09/893606
Inventors:
Jatila Ranasinghe - Niskayuna NY
Assignee:
General Electric Company - Schenectady NY
International Classification:
F02C 618
US Classification:
60772, 60 39182, 60736
Abstract:
A combined cycle power plant system, comprising a compressor; a combustor receiving air provided by the compressor; a gas turbine for expanding gas provided by the compressor; a heat recovery steam generator (HRSG) for receiving exhaust gases from the gas turbine. The heat recovery steam generator (HRSG) receives exhaust gases from the gas turbine. The HRSG includes a low pressure (LP) section; a high pressure (HP) section for receiving exhaust gases from the gas turbine and located upstream of the LP section, each of the LP and HP sections include an evaporator section. An intermediate pressure (IP) section is located between the HP and the LP sections, the IP section includes an economizer, first and second evaporators, and a water heater ( ) disposed between the first and second evaporators. A fuel gas heater is provided for receiving heated water from the water heater.