# US 2009/0260362 A1 · Method of Decomposing Gas Hydrate, and Apparatus Therefor, in Gas Turbine Combined Power Generation System

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- Number: US 2009/0260362 A1
- Document ID: US20090260362A1
- Status: Published application
- Kind: A1
- Application number: 12/226,275
- Filed: 2006-04-14
- Published: 2009-10-22
- Earliest claimed: 2006-04-14
- Assignees: Mitsui Engineering & Shipbuilding Co., Ltd.
- Inventors: Takeshi Suzuki
- Web page: https://patentgrep.com/patent/US20090260362A1

## CPC

- F01K 23/10: with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence)
- F01K 9/003: {condenser cooling circuits}
- F02C 3/28: using a separate gas producer for gasifying the fuel before combustion
- F28B 5/00: Condensers employing a combination of the methods covered by main groups F28B1/00 and F28B3/00; Other condensers
- F28D 7/16: the conduits being arranged in parallel spaced relation ({F28D7/0008 - F28D7/0058 take precedence}; F28D7/02 - F28D7/10 take precedence)
- 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)
- 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)
- F28B: STEAM OR VAPOUR CONDENSERS (condensation of vapours B01D5/00; steam engine plants having condensers F01K; liquefaction of gases F25J; details of heat-exchange and heat-transfer arrangements of general application F28F)
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A gas turbine combined power generation system using, as a fuel, gas (c) generated by decomposition of gas hydrate (h). The system includes a pump (19) for circulating condensate (n) produced by a condenser (10) to the vapor inlet side of the condenser, a heat exchanger (11) for exchanging heat between the circulating condensate (r) and circulating water (i) supplied to decompose the gas hydrate (h), and a pump (26) for circulating the circulating water to a decomposition tank (32) for the gas hydrate (h).

## Claims

### Claim 1

A method of decomposing gas hydrate in a gas turbine combined power generation system, the gas turbine combined power generation system using, as a fuel, gas generated by decomposition of gas hydrate, and the method comprising the steps of:
circulating condensate generated in a condenser to the vapor inlet side of the condenser;
exchanging heat between the circulating condensate and circulating water supplied to decompose gas hydrate; and
using the heat-exchanged circulating water to decompose gas hydrate.

### Claim 2

An apparatus for decomposing gas hydrate in a gas turbine combined power generation system, the gas turbine combined power generation system using, as a fuel, gas generated by decomposition of gas hydrate, and the apparatus comprising:
a pump that circulates condensate generated in a condenser to the vapor inlet side of the condenser;
a heat exchanger that causes heat to be exchanged between the circulating condensate and circulating water supplied to decompose gas hydrate; and
a pump that circulates the circulating water to a gas hydrate thermal decomposition tank.