초록 ▼

A gas turbine power plant operating on a dual Brayton cycle and utilizing a circulating pressurized fluidized bed combustor is disclosed. An open Brayton cycle is provided in which the hot flue gas from the fluidized bed combustor is expanded to extract work to drive compressors to supply combustion

A gas turbine power plant operating on a dual Brayton cycle and utilizing a circulating pressurized fluidized bed combustor is disclosed. An open Brayton cycle is provided in which the hot flue gas from the fluidized bed combustor is expanded to extract work to drive compressors to supply combustion air for the fluidized bed combustor and to drive an electric generator to produce electricity. The residual heat of the flue gas exhausted from the open Brayton cycle can be utilized for heat cogeneration at high power-to-heat ratios. A closed Brayton cycle is also provided, the working medium of which is heated in an indirect heater of the circulating pressurized fluidized bed combustor and expanded to extract work to drive another electric generator. The air supplied by the open Brayton cycle is also used to fluidize the heated particles in the indirect heater. The power plant is capable of burning a wide variety of fuels, operating over a broad size range, and minimizing pollution while providing highly efficient, low cost electric power and heat production.

대표청구항 ▼

A power plant comprising: a circulating pressurized fluidized bed combustor having an outlet for a flue gas stream; an indirect heater in communication with said fluidized bed combustor for receiving solid particles from said outlet of said fluidized bed combustor; first piping connected to said out

A power plant comprising: a circulating pressurized fluidized bed combustor having an outlet for a flue gas stream; an indirect heater in communication with said fluidized bed combustor for receiving solid particles from said outlet of said fluidized bed combustor; first piping connected to said outlet of said fluidized bed combustor and said indirect heater for directing the solid particles from said outlet of said fluidized bed combustor to said indirect heater; second piping connected to an outlet of said indirect heater and said fluidized bed combustor for returning solid particles to said fluidized bed combustor; a heat exchanger located in said indirect heater for heat transfer from solid particles in said indirect heater; a closed-cycle gas turbine comprising: a compressor, a turbine, and a generator connected on a common shaft, and a closed piping system for circulating a first working fluid through said closed-cycle gas turbine, said closed piping system further comprising a piping section located for directing the working fluid downstream of said compressor to said heat exchanger in said indirect heater and for returning the first working fluid to said turbine, whereby the first working fluid on said piping section is heated by heat transfer from the solid particles in said indirect heater; and an open-cycle gas turbine comprising: a compressor, a turbine, and a generator connected on a common shaft, and an open piping system comprising: a first section in fluid communication with said fluidized bed combustor for circulating the flue gas stream from said fluidized bed combustor to said turbine for expansion, and a second section for circulating a second working fluid to said compressor and said indirect heater to fluidize the solid particles in said indirect heater and for directing said second working fluid to said fluidized bed combustor.