Steam Injected Gas Turbines

Fig. 6.1a shows diagrammatically the steam injection gas turbine (STIG) plant steam. raised in a heat recovery steam generator (HRSG) downstream of the turbine, is injected into the combustion chamber or into the turbine nozzle guide vanes. 

Cerri, G. and Arsuffi, G. (1986), Calculation procedures for steam injected gas turbine cycle with autonomous distilled water production, ASME Paper 86-GT-297. 

The maximum speed of the LH2 carrier is about 17.5 kn (32.4 km/h). The propulsion power is 41 MW. The propulsion of the SWATH carrier is based on a steam-injection gas turbine with an efficiency of 50% (Wursig, 1996). The investment for the SWATH carrier is indicated at about 440 million, including five LH2 tanks. The investment for one LH2 tank is 40 million. The investment for the LH2 terminals (both export and import terminal) is indicated at about 820 million (G. M. Wursig, Germanischer Lloyd, Hamburg, personal communication, January 1999). 

The injection of water or steam in gas turbines has been known (Nicolin, C., A gas turbine with steam injection. Swedish Patent application No.8112/51, Stockholm, Sweden, 1951) as an efficient method for NO abatement and power boosting. Several cycle configurations are possible with respect to water/steam injection. Figure 4.36 is the schematic diagram of the Steam-injection gas turbine cycle. Air is compressed from state 1 to state 2. Water is pumped from state 7 to state 8. Steam at state 9 is generated in a recovery boiler (heat exchanger) from state 8 by the hot exhaust gas. Steam at state 8... 

The beneficial influences of the steam-injection gas turbine cycle include ... 

CyclePad is not able to perform the steam-injection gas turbine cycle, because there is no binary working fluid in the substance menu of the software. 

Review Problems 4.10 Steam-Injection Gas Turbine Cycle... 

Draw the schematic diagram of the steam-injection gas turbine cycle by placing the mixing chamber between the combustion chamber (heater) and the turbine. 

A Comparison of Steam-Injected Gas Turbine and Combined-Cycle Power Plants Technology Assessment. Palo Alto, California Electric Power Research Institute, June 30, 1989. GS-6415s. 

---