# US 2014/0190144 A1 · Power generating system and method for operating the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0190144 A1
- Document ID: US20140190144A1
- Status: Published application
- Kind: A1
- Application number: 14/139,583
- Filed: 2013-12-23
- Published: 2014-07-10
- Earliest claimed: 2012-12-25
- Assignees: Mitsubishi Heavy Industries, Ltd.
- Applicants: Mitsubishi Heavy Industries, Ltd.
- Inventors: Hiroyuki OZAWA
- Web page: https://patentgrep.com/patent/US20140190144A1

## CPC

- H01M 8/04761: {of fuel cell exhausts}
- F02C 3/20: using a special fuel, oxidant, or dilution fluid to generate the combustion products
- H01M 8/04164: {by condensers, gas-liquid separators or filters}
- H01M 8/0435: {of cathode exhausts}
- H01M 8/04753: {of fuel cell reactants}
- H01M 2008/1095: {Fuel cells with polymeric electrolytes}
- Y02E 20/16: Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E 60/50: Fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A power generating system includes a fuel cell, an exhausted oxidized gas line to which exhausted oxidized gas is discharged from the fuel cell, a gas turbine having a combustor configured to burn an exhausted oxidized gas passing through the exhausted oxidized gas line together with a fuel gas, a temperature detection unit configured to detect a temperature of the exhausted oxidized gas discharged from the fuel cell or a temperature of the exhausted oxidized gas passing through the exhausted oxidized gas line, a fluid supply unit configured to supply a fluid to the exhausted oxidized gas line, and a control unit configured to control an amount of the fluid to be supplied from the fluid supply unit to the exhausted oxidized gas line based on a detection result in the temperature detection unit.

## Claims

### Claim 1

A power generating system comprising:
a fuel cell;
an exhausted oxidized gas line to which an exhausted oxidized gas is discharged from the fuel cell;
a gas turbine including a combustor configured to burn an exhausted oxidized gas passing through the exhausted oxidized gas line together with a fuel gas;
a temperature detection unit configured to detect a temperature of the exhausted oxidized gas discharged from the fuel cell or a temperature of the exhausted oxidized gas passing through the exhausted oxidized gas line;
a fluid supply unit configured to supply fluid to the exhausted oxidized gas line; and
a control unit configured to control an amount of the fluid to be supplied from the fluid supply unit to the exhausted oxidized gas line based on a detection result in the temperature detection unit.

### Claim 2 (depends on 1)

The power generating system according to claim 1, wherein the fluid supply unit includes a plurality of nozzles configured to supply the fluid to the exhausted oxidized gas line.

### Claim 3 (depends on 1)

The power generating system according to claim 1, further comprising:
an NOx concentration detection unit configured to detect a nitrogen oxide concentration in a flue gas discharged from the combustor,
wherein the control unit increases the amount of the fluid to be supplied from the fluid supply unit to the exhausted oxidized gas line when a nitrogen oxide concentration detected in the NOx concentration detection unit has exceeded a desired controlled concentration.

### Claim 4 (depends on 1)

The power generating system according to claim 1, further comprising:
an electric generator configured to rotate with a rotational shaft of the gas turbine to generate power,
wherein the control unit increases the amount of the fluid to be supplied from the fluid supply unit to the exhausted oxidized gas line when an increase amount of requested output to the electric generator has exceeded an upper limit value.

### Claim 5 (depends on 1)

The power generating system according to claim 1,
wherein the fluid supply unit includes
a fluid storage unit configured to store the fluid,
a fluid supply line connecting the exhausted oxidized gas line to the fluid storage unit,
a fluid control valve provided on the fluid supply line, and
a fluid pump provided on the fluid supply line and configured to send fluid out of the fluid storage unit to the exhausted oxidized gas line, and
the control unit controls an opening and closing of the fluid control valve and a driving of the fluid pump based on the temperature detected in the temperature detection unit.

### Claim 6 (depends on 5)

The power generating system according to claim 5,
wherein water is stored as fluid in the fluid storage unit.

### Claim 7 (depends on 5)

The power generating system according to claim 5, further comprising:
a water recovering unit configured to extract and recover water included in the exhausted oxidized gas or an exhausted fuel gas discharged from the fuel cell,
wherein the water recovered by the water recovering unit is stored as the fluid in the fluid storage unit.

### Claim 8

A method for operating a power generating system, the method comprising:
sending an exhausted oxidized gas discharged from a fuel cell through an exhausted oxidized gas line;
detecting a temperature of the exhausted oxidized gas discharged from the fuel cell; and
determining, based on the detected temperature of the exhausted oxidized gas, an amount of fluid to be supplied in order to supply the determined amount of fluid to the exhausted oxidized gas line.