Combined cycle electric power plant and a heat recovery steam generator having improved boiler feed pump flow control
A combined cycle electric power plant is described that 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.
- Assignee:
- Westinghouse Electric Corp.
- Patent Number(s):
- US 3965675
- OSTI ID:
- 7146642
- Country of Publication:
- United States
- Language:
- English
Similar Records
Combined boiler feed and condensate pump
Cogeneration system with low N0 sub x combustion of liquid fuel
Related Subjects
200102* -- Fossil-Fueled Power Plants-- Power Cycles
BOILERS
COMBINED-CYCLE POWER PLANTS
CONTROL SYSTEMS
DESIGN
ENERGY RECOVERY
FEEDWATER
HEAT RECOVERY
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
POWER PLANTS
PUMPS
RECOVERY
STEAM GENERATORS
THERMAL POWER PLANTS
VAPOR GENERATORS
WATER