Single pressure steam bottoming cycle for gas turbines combined cycle
This patent describes a process for recapturing waste heat from the exhaust of a gas turbine to drive a high pressure-high temperature steam turbine and a low pressure steam turbine. It comprises: delivering the exhaust of the gas turbine to the hot side of an economizer-reheater apparatus; delivering a heated stream of feedwater and recycled condensate through the cold side of the economizer-reheater apparatus in an indirect heat exchange relationship with the gas turbine exhaust on the hot side of the economizer-reheater apparatus to elevate the temperature below the pinch point of the boiler; delivering the discharge from the high pressure-high temperature steam turbine through the economizer-reheater apparatus in an indirect heat exchange relationship with the gas turbine exhaust on the hot side of the economizer-reheater apparatus; driving the high pressure-high temperature steam turbine with the discharge stream of feedwater and recycled condensate which is heated to a temperature below the pinch point of the boiler by the economizer-reheater apparatus; and driving the low pressure steam turbine with the discharged stream of the high pressure-high temperature steam turbine reheated below the pinch point of the boiler by the economizer-reheater apparatus.
- Assignee:
- Stone and Webster Engineering Corp., Boston, MA
- Patent Number(s):
- US 4896496; A
- Application Number:
- PPN: US 7-223564A
- OSTI ID:
- 6969611
- Resource Relation:
- Patent File Date: 25 Jul 1988
- Country of Publication:
- United States
- Language:
- English
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EXHAUST GASES
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GAS TURBINES
HEAT RECOVERY EQUIPMENT
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WASTE HEAT UTILIZATION
BOTTOMING CYCLES
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WASTE HEAT
ENERGY
ENERGY RECOVERY
EQUIPMENT
FLUIDS
GASEOUS WASTES
GASES
HEAT
MACHINERY
RECOVERY
THERMODYNAMIC CYCLES
TURBINES
TURBOMACHINERY
WASTE PRODUCT UTILIZATION
WASTES
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