# US 2013/0152586 A1 · Integrated Solar Combined Cycle Power Generation System and Integrated Solar Combined Cycle Power Generation Method

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

- Number: US 2013/0152586 A1
- Document ID: US20130152586A1
- Status: Published application
- Kind: A1
- Application number: 13/713,426
- Filed: 2012-12-13
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: Hitachi, Ltd.
- Inventors: Nobuyoshi MISHIMA; Takashi SUGIURA; Toshihiko SAKAKURA
- Web page: https://patentgrep.com/patent/US20130152586A1

## CPC

- F01K 23/10: with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence)
- F03G 6/064: {having a gas turbine cycle, i.e. compressor and gas turbine combination}
- F03G 6/067: {Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger}
- F03G 6/121: {Controlling or monitoring}
- F22B 1/006: {using solar heat}
- F22B 1/1815: {using the exhaust gases of gas-turbines}
- F03G 6/071: {with energy storage devices}
- Y02E 10/46: Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
- Y02E 20/16: Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- F01K: STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants F02; nuclear power plants, engine arrangements therein G21D)
- F03G: SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR (arrangements in connection with power supply in vehicles from force of nature B60K16/00; electric propulsion with power supply in vehicles from force of nature B60L8/00)
- F22B: METHODS OF STEAM GENERATION; STEAM BOILERS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An integrated solar combined cycle power generation system includes a solar heat collector for collecting solar heat and generating solar heat steam; a gas turbine; a gas turbine exhaust heat recovery boiler; and a steam turbine; wherein the solar heat steam is decreased in temperature by a solar heat steam desuperheater under a normal condition, and the temperature decrease is stopped or a temperature decrease rate is reduced when the solar heat steam temperature falls due to a cause such as a sudden weather change, wherein the solar heat steam is joined to generated steam by a high-pressure drum or exit steam of a primary superheater, and wherein a main steam temperature control by a main steam temperature control valve is combined so that the main steam, the temperature of which is controlled to a predetermined temperature, is supplied to the steam turbine.

## Claims

### Claim 1

An integrated solar combined cycle power generation system comprising:
a solar heat collector for generating steam by a heat medium heated by solar heat or generating steam by collecting the solar heat;
a gas turbine;
a gas turbine exhaust heat recovery boiler;
a steam turbine;
a solar heat steam supply pipe conduit for supplying the steam generated by the solar heat collector to an exit pipe of a high-pressure drum of the gas turbine exhaust heat recovery boiler;
a solar heat steam desuperheater installed in the solar heat steam supply pipe path for decreasing a temperature of the steam flowing inside the solar heat steam supply pipe conduit; and
a control unit for controlling the temperature decrease by the solar heat steam desuperheater, wherein the control unit being configured to stop the temperature decrease by the desuperheater or reduce a temperature decrease rate when the temperature of the steam generated by the solar heat collector falls.

### Claim 2 (depends on 1)

The integrated solar combined cycle power generation system according to claim 1, wherein the control unit is configured to control the temperature decrease so that the temperature of the steam generated by the solar heat collector becomes a temperature of saturated steam generated by the high-pressure drum of the gas turbine exhaust heat recovery boiler.

### Claim 3

An integrated solar combined cycle power generation system comprising:
a solar heat collector for generating steam by a heat medium heated by solar heat or generating steam by collecting the solar heat;
a gas turbine;
a gas turbine exhaust heat recovery boiler;
a steam turbine;
a solar heat steam supply pipe conduit for supplying steam generated by the solar heat collector to an exit pipe of a primary superheater of the gas turbine exhaust heat recovery boiler;
a solar heat steam desuperheater installed in the solar heat steam supply pipe conduit for decreasing a temperature of the steam flowing inside the solar heat steam supply pipe conduit; and
a control unit for controlling the temperature decrease by the solar heat steam desuperheater, wherein the control unit being configured to stop the temperature decrease by the desuperheater or reduce a temperature decrease rate when the temperature of the steam generated by the solar heat collector falls.

### Claim 4 (depends on 3)

The integrated solar combined cycle power generation system according to claim 3, wherein the control unit is configured to control the temperature decrease so that the temperature of the steam generated by the solar heat collector becomes a condition of superheated steam.

### Claim 5 (depends on 1)

The integrated solar combined cycle power generation system according to claim 1, further comprising a main steam desuperheater between a primary superheater and a secondary superheater of the gas turbine exhaust heat recovery boiler.

### Claim 6 (depends on 5)

The integrated solar combined cycle power generation system according to claim 5, wherein
the solar heat collector includes a trough-type sunlight heat collection reflector, an evaporator for generating steam using the heat medium heated by the trough-type sunlight heat collection reflector as a heating medium, and an superheater for superheating the steam evaporated by the evaporator using the heated heat medium as a heating medium;
the solar heat steam desuperheater sprays feed water from a feed water pump of the gas turbine exhaust heat recovery boiler; and
the control unit is configured to adjust the spray amount so that the temperature decrease is controlled, and to execute a rapid reduction of the spray amount at the time of sunlight shut-off.

### Claim 7 (depends on 5)

The integrated solar combined cycle power generation system according to claim 5, wherein
the solar heat collector includes a heliostat and a steam-type tower solar heat collector;
the solar heat steam desuperheater sprays feed water from a feed water pump of the gas turbine exhaust heat recovery boiler; and
the control unit is configured to adjust the spray amount so that the temperature decrease is controlled, and to execute a rapid reduction of the spray amount at the time of sunlight shut-off.

### Claim 8 (depends on 5)

The integrated solar combined cycle power generation system according to claim 5, wherein
the solar heat collector includes a heliostat, a heat storage type tower solar heat collector, and an evaporator for generating superheated steam using the heat medium heated by the heat storage type tower solar heat collector as a heated medium;
the solar heat steam desuperheater sprays feed water from a feed water pump of the gas turbine exhaust heat recovery boiler; and
the control unit is configured to adjust the spray amount so that the temperature decrease is controlled, and to execute a rapid reduction of the spray amount at the time of sunlight shut-off.

### Claim 9

An integrated solar combined cycle power generation method for supplying steam generated by solar heat to a gas turbine exhaust heat recovery type combined cycle thermal power generation system including a gas turbine, a gas turbine exhaust heat recovery boiler, and a steam turbine and improving output of the steam turbine, comprising the steps of:
decreasing a temperature of the steam generated by the solar heat during a normal operation and joining the solar heated steam to steam generated by a high-pressure drum of the gas turbine exhaust heat recovery boiler or steam at an exit of a primary superheater of the gas turbine exhaust heat recovery boiler; and
stopping the temperature decrease rapidly or reducing a temperature decrease rate rapidly at the time of sunlight shut-off and joining the solar heated steam to the steam generates by the high-pressure drum or the steam at the exit of the primary superheater.

### Claim 10 (depends on 9)

The integrated solar combined cycle power generation method according to claim 9, wherein further comprising the step of:
controlling a temperature of a main steam to be supplied to the steam turbine to a predetermined temperature in combination with a main steam temperature control of the gas turbine exhaust heat recovery boiler.

### Claim 11 (depends on 2)

The integrated solar combined cycle power generation system according to claim 2, further comprising a main steam desuperheater between a primary superheater and a secondary superheater of the gas turbine exhaust heat recovery boiler.

### Claim 12 (depends on 3)

The integrated solar combined cycle power generation system according to claim 3, further comprising a main steam desuperheater between a primary superheater and a secondary superheater of the gas turbine exhaust heat recovery boiler.

### Claim 13 (depends on 4)

The integrated solar combined cycle power generation system according to claim 4, further comprising a main steam desuperheater between a primary superheater and a secondary superheater of the gas turbine exhaust heat recovery boiler.