Korea Electric Power Corporation

Won Shik Park

Min Chul Lee

Dal Hong Ahn

Yong Jin Joo

Jae Hwa Chung

Seok Seo

Si Moon Kim

Hae Kyung Seo

Jin Pyo Hong

Disclosed is a triple swirl gas turbine combustor using various fuels such as coal gas, DiMethyl Ether, and waste gas generated in an ironworks in a gas turbine. The triple swirl gas turbine combustor combusts three different fuels simultaneously or individually and various fuels such as LCV gas and HCV gas so that fuel flexibility can be improved. Swirl generated in a second swirler of the triple swirler is reversely jetted to increase a mixing degree of a fuel-air mixture and an intensity of a turbulent flow so that combustion efficiency can be increased, harmful exhaust gas can be reduced and vibration can be reduced.

Triple swirl gas turbine combustor

Disclosed herein are a fuel nozzle of a gas turbine combustor for dimethyl ether (DME, CHOCH) and a design method thereof. The fuel nozzle includes a pilot fuel injection hole formed at the center of the nozzle and a plurality of fuel injection ports formed at equiangular positions around the pilot fuel injection hole to inject DME. Each of the fuel injection ports includes a pair of upper and lower DME injection orifices communicating with a fuel-air mixture injection swirler. The upper DME injection orifice becomes gradually wider, whereas the lower DME injection orifice becomes gradually narrower. Thus, DME can be optimally combusted in the gas turbine combustor, thereby achieving cost reduction of power plants, enhancement in reliability of the power plants, and diversification of usable fuel.

Fuel nozzle of gas turbine combustor for DME and design method thereof

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Daejeon, South Korea

Won Shik Park