Single pressure steam bottoming cycle for gas turbines combined cycle

Patent · Mon Jan 29 23:00:00 EST 1990

OSTI ID:6969611

Zervos, N

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
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
200105 -- Fossil-Fueled Power Plants-- Heat Utilization
BOTTOMING CYCLES
DESIGN
ENERGY
ENERGY RECOVERY
EQUIPMENT
EXHAUST GASES
FLUIDS
GAS TURBINES
GASEOUS WASTES
GASES
HEAT
HEAT RECOVERY
HEAT RECOVERY EQUIPMENT
MACHINERY
RECOVERY
STEAM TURBINES
THERMODYNAMIC CYCLES
TURBINES
TURBOMACHINERY
WASTE HEAT
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES