LYLE FREED MARTZ
Engineers in Verona, PA

4028884, Jun 14, 1977

Dec 27, 1974

5/537036

Lyle F. Martz - Verona PA
Jack R. Smith - Pittsburgh PA
Francis A. Lebonette - Swarthmore PA
Robert A. Putnam - Elverson PA
Paul A. Berman - Plymouth Meeting PA

Westinghouse Electric Corporation - Pittsburgh PA

F02C 702

60 3918B

A combined cycle electric power generating plant includes gas and steam turbines and a heat recovery steam generator recovering the heat in the exhaust gases exited from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. The gas turbine includes a plurality of variably set guide vanes whose position may be set to determine the inlet flow to the gas turbine. Guide vane control apparatus is provided to limit the inlet guide vane position as a function of gas turbine compressor inlet temperature in accordance with a desired gas turbine exhaust flow, and to match the gas turbine exhaust flow to the steam requirements of the steam generator as in turn determined by the load placed upon its steam turbine. In addition, an afterburner is provided to supplementally heat the exhaust gas turbine gases before they are directed to the steam generator. During the startup, the afterburners are operated to supply supplemental heating to the gas turbine exhaust gases supplied to the steam generator whereby the temperature of the steam passed to the steam turbine is maintained at a minimum level.

3974644, Aug 17, 1976

Aug 8, 1974

5/495736

Lyle F. Martz - Verona PA
Richard J. Plotnick - Cherry Hill NJ

Westinghouse Electric Corporation - Pittsburgh PA

F02C 734, F02C 702

60 3918B

A combined cycle electric power plant includes gas and steam turbines and a steam generator for recovering the heat in the exhaust gases exited from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. The steam generator includes a superheater tube and a steam drum from which heated steam is directed through the superheater to be additionally heated into superheated steam by the exhaust gas turbine gases. An afterburner serves to further heat the exhaust gas turbine gases passed to the superheater tube and a bypass conduit is disposed about the superheater tube whereby a variable steam flow determined by a bypass valve disposed in the bypass conduit may be directed about the superheater tube to be mixed with the superheated steam therefrom, whereby the temperature of the superheated steam supplied to the steam turbine may be accurately controlled. Steam temperature control means includes a first control loop responsive to the superheated steam temperature for regulating the position of the bypass valve with respect to a first setpoint, and a second control loop responsive to the superheated steam temperature for controlling the fuel supply to the afterburner with respect to a second setpoint varying in accordance with the bypass valve position. In particular, as the bypass valve position increases, the second setpoint, originally higher than, is lowered toward a value substantially equal to that of the first setpoint.

4455614, Jun 19, 1984

Sep 21, 1973

5/399790

Lyle F. Martz - Verona PA
Roy W. Kiscaden - Springfield PA
Robert Uram - East Pittsburgh PA

Westinghouse Electric Corp. - Pittsburgh PA

G06F 1520, F01K 2300, G05B 1900

364494

A combined cycle electric power plant includes in interconnected relationship a steam turbine, two gas turbines, three electric generators, two heat recovery steam generators, a hybrid computer control system, a plant protection system and various items of auxiliary equipment. A computerized simulator is interfaced with the control system at the factory site to test the controls and the control system is then modularly disassembled in various structures and shipped to the field site for reassembly without need for extensive field testing. The control system includes a digital control computer, a digital monitor computer and modular analog controls for the turbines. Various levels of automated control can be employed including coordinated plant control which involves supervisory operation of the analog controls by the control computer. In analog control, complete plant operation is produced by operation of the analog controls without the control computer.

4031404, Jun 21, 1977

Aug 8, 1974

5/495723

Lyle F. Martz - Verona PA
Richard J. Plotnick - Cherry Hill NJ

Westinghouse Electric Corporation - Pittsburgh PA

F01K 2300

290 40R

A combined cycle electric power plant includes gas and steam turbines and a steam generator for recovering the heat in the exhaust gases exited from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. The steam generator includes a superheater tube through which a fluid, e. g. water, is directed to be additionally heated into superheated steam by the exhaust gas turbine gases. An afterburner further heats the exhaust gas turbine gases passed to the superheater tube. The temperature of the gas turbine exhaust gases is sensed for varying the fuel flow to the afterburner by a fuel valve, whereby the temperatures of the gas turbine exhaust gases and therefore of the superheated steam, are controlled. Further, override signals are generated to prevent the temperature of the superheated steam from falling below a predetermined minimum level and for preventing the temperature and pressure of the superheated steam from exceeding maximum levels.

3965675, Jun 29, 1976

Aug 8, 1974

5/495724

Lyle F. Martz - Verona PA
Richard J. Plotnick - Cherry Hill NJ

Westinghouse Electric Corporation - Pittsburgh PA

F01K 2310, F01K 1302

60 3918B

A combined cycle electric power plant includes gas and steam turbines and a steam generator for recovering the heat in the exhaust gases exited from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. The steam generator includes an economizer tube and a high pressure evaporator tube and a boiler feed pump for directing the heat exchange fluid serially through the aforementioned tubes. A condenser is associated with the steam turbine for converting the spent steam into condensate water to be supplied to a deaerator for removing undesired air and for preliminarily heating the water condensate before being pumped to the economizer tube. Condensate flow through the economizer tube is maintained substantially constant by maintaining the boiler feed pump at a predetermined, substantially constant rate. A bypass conduit is provided to feed back a portion of the flow heated in the economizer tube to the deaerator; the portion being equal to the difference between the constant flow through the economizer tube and the flow to be directed through the high pressure evaporator tube as required by the steam turbine for its present load.

4184324, Jan 22, 1980

Apr 2, 1975

5/564562

Roy W. Kiscaden - Springfield PA
Lyle F. Martz - Verona PA
Robert Uram - East Pittsburgh PA

Westinghouse Electric Corp. - Pittsburgh PA

F02C 702

60 3918B

A combined cycle electric power plant includes gas and steam turbines and a steam generator for recovering the heat in the exhaust gases exited from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. The steam generator includes a superheater tube through which a fluid, e. g. water, is directed to be additionally heated into superheated steam by the exhaust gas turbine gases. An afterburner further heats the exhaust gas turbine gases passed to the superheater tube. The temperature of the gas turbine exhaust gases is sensed for varying the fuel flow to the afterburner by a fuel valve, whereby the temperatures of the gas turbine exhaust gases and therefore of the superheated steam, are controlled. A plant load demand error signal is utilized for correcting a coordinated gas turbine load reference and for trimming a feedforward afterburner control signal derived from the sensed gas turbine exhaust temperatures.

3955358, May 11, 1976

Aug 8, 1974

5/495738

Lyle F. Martz - Verona PA
Richard J. Plotnick - Cherry Hill NJ

Westinghouse Electric Corporation - Pittsburgh PA

F01K 2306

60 3918B

A combined cycle electric power plant includes gas and steam turbines and a steam generator for recovering the heat in the exhaust gases exited from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. A condenser receives the spent steam from the steam turbine for converting it into condensate. The steam generator includes a deaerator for receiving the condensate flow from the condenser and for storing it in a storage portion, a feedwater pump for directing the stored condensate through a first heat exchange tube whereby heat is transferred from the gas turbine exhaust gases to the fluid, a main drum for receiving and storing the heated fluid and a second heat exchange tube for heating the fluid by the gas turbine exhaust gases into superheated steam to be supplied to the steam turbine. A water make-up system is associated with the condenser and includes a water make-up storage tank, a return valve for extracting condensate from that supplied to the deaerator for storage in the water make-up storage tank, and a make-up valve for returning water from the water make-up storage tank into the condenser. Fluid level control is provided for maintaining the fluid level within a hotwell storage portion of the condenser, and within the storage portion of the deaerator, by controlling the position of the condensate valve.

3948043, Apr 6, 1976

Aug 8, 1974

5/495714

Lyle F. Martz - Verona PA

Westinghouse Electric Corporation - Pittsburgh PA

F02K 310

60243

A combined cycle power plant includes gas and steam turbines, gas turbine afterburners, steam generators, and a digital/analog control system. A megawatt load control system varies a fuel control signal to govern a detected power output according to a reference value, the fuel control signal determining the flow rate of fuel to a gas turbine. An afterburner is connected to heat the exhaust gas from the gas turbine. Both the gas turbine and the afterburner are adapted to use gas and liquid fuels. During gas turbine fuel transfer, the gas and liquid fuel flows are controlled in response to the fuel control signal to compensate power output disturbances that typically result from various nonlinearities of fuel system elements. Afterburner fuel transfer is initiated upon completion of gas turbine transfer. During afterburner transfer, the output signals of a temperature controller that otherwise determine the positions of the afterburner fuel control valves are interrupted, and a burner supervisor generates such signals to transfer afterburner fuel flow at a desired flow rate.

4011735, Mar 15, 1977

Nov 29, 1974

5/528590

Lyle F. Martz - Verona PA
John W. Nanz - Pittsburgh PA

Westinghouse Electric Corporation - Pittsburgh PA

F24F 302

62186

An automatic control system for high pressure blower applications prevents surging under variable supply flow rate requirements and achieves maximum efficiency of operation. The supply flow rate establishes the set point of a proportional plus reset controller, the latter receiving a feedback signal corresponding to the static discharge pressure of the supply blower and responding thereto for controlling the output of the supply blower. A return blower is controlled either through a characterizer relay in proportion to the control of the supply blower to maintain a fixed precalibrated relationship between supply and return flow rates or by a further proportional plus reset controller responsive to the supply flow rate, for establishing the set point thereof, and to the return flow rate, as a feedback signal thereto, for controlling the output of the return blower.

RE28946, Aug 31, 1976

Oct 1, 1974

5/510966

Lyle F. Martz - Verona PA
John W. Nanz - Pittsburgh PA

Westinghouse Electric Corporation - Pittsburgh PA

F01B 2500

415 17

An automatic control system for high pressure blower applications prevents surging under variable supply flow rate requirements and achieves maximum efficiency of operation. The supply flow rate establishes the set point of a proportional plus reset controller, the latter receiving a feedback signal corresponding to the static discharge pressure of the supply blower and responding thereto for controlling the output of the supply blower. A return blower is controlled either through a characterizer relay in proportion to the control of the supply blower to maintain a fixed precalibrated relationship between supply and return flow rates or by a further proportional plus reset controller responsive to the supply flow rate, for establishing the set point thereof, and to the return flow rate, as a feedback signal thereto, for controlling the output of the return blower.