Power generation system

Patent metadata

Field	Value
Publication number	US-9777629-B2
Application number	US-201314439073-A
Country	US
Kind code	B2
Filing date	Oct 28, 2013
Priority date	Oct 31, 2012
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

This power generation system is provided with: a gas turbine ( 11 ) having a compressor ( 21 ), a combustor ( 22 ) and a turbine ( 23 ); a first compressed air supply line ( 26 ) that supplies compressed air, which has been compressed by the compressor ( 21 ), to the combustor ( 22 ); a solid oxide fuel cell (SOFC) ( 13 ) having an air electrode and a fuel electrode; a compressed air supply device ( 61 ) capable of generating compressed air; and a second compressed air supply line ( 31 ) that supplies compressed air, which has been compressed by the compressed air supply device ( 61 ) to the SOFC ( 13 ). The fuel cell can thus be stably operated regardless of the operating state of the gas turbine.

First claim

The invention claimed is:

1. A power generation system comprising:
a gas turbine having a compressor and a combustor;
a first compressed air supply line for supplying first compressed air compressed by the compressor to the combustor;
a fuel cell having an air electrode and a fuel electrode;
a compressed air supply unit capable of generating second compressed air;
a second compressed air supply line for supplying second compressed air compressed by the compressed air supply unit to the fuel cell;
a heat recovery steam generator for generating steam using exhaust gas from the gas turbine; and
a steam turbine driven by steam generated by the heat recovery steam generator,
wherein the compressed air supply unit includes a steam-driven fuel cell compressor and a steam supply line for supplying steam generated by the heat recovery steam generator to a steam turbine for driving the steam-driven fuel cell compressor.

2. The power generation system according to claim 1 , further comprising: a first on/off valve capable of opening and closing the second compressed air supply line, a bypass line connecting the first compressed air supply line and the second compressed air supply line; and a second on/off valve for opening and closing the bypass line.

3. The power generation system according to claim 2 , further comprising a control unit capable of opening and closing the first on/off valve and the second on/off valve, wherein the control unit closes the first on/off valve and opens the second on/off valve when the fuel cell is stopped.

Assignees

• Mitsubishi Hitachi Power Sys

Inventors

• Nakamoto Yukimasa
• Fujita Kazunori

Classifications

• H01M8/04201

  Reactant storage and supply, e.g. means for feeding, pipes · CPC title

• F02C6/04 Primary

  Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output (F02C6/18 takes precedence {; for a fluidised-bed combustor F02C3/205}) · CPC title

• F02C3/20

  using a special fuel, oxidant, or dilution fluid to generate the combustion products · CPC title

• H01M8/04111

  using a compressor turbine assembly · CPC title

• F02C6/00

  Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use · CPC title