Abstract: A supercharging system for gas turbine power plants (11). The system includes a supercharging fan (30, 32) and controller (50) for limiting turbine power output to prevent overload of the generator (28) at lower ambient temperatures. The controller can limit power output by burner control, inlet temperature control, control of supercharging fan pressure and other options. The system can be retrofit on an existing turbine without replacing the generator and associated parts.

Abstract: A generating plant with improved capacity at high ambient temperatures comprises a gas turbine (32) matched to a generator (26) for summer peaking conditions. The plant includes a system for limiting turbine output at lower ambient temperatures to ensure that the generator or other components are not overloaded. It also preferably includes an evaporative cooler (70) for gas turbine inlet air.

Abstract: A supercharging system for gas turbine power plants. The system includes a supercharging fan and means for limiting turbine power output to prevent overload of the generator at lower ambient temperatures. Possible means for limiting power output include burner control, inlet temperature control, control of supercharging fan pressure, and other options. Supercharging fan pressure can be controlled by staging fans, variable-speed drives, variable-pitch blades, and other options. The invention permits the supercharging system to be retrofit on existing turbines without replacing the generator and associated auxiliary equipment. A novel high-pressure duct design (particularly for use between the supercharging fan and the gas turbine) is also disclosed.

Abstract: A supercharger for improving performance of a gas-turbine power plant at high ambient temperatures. The supercharger comprises an auxiliary fan that can pressurize air before it enters the gas turbine and means for limiting turbine power output at lower ambient temperatures. The means for limiting turbine power may include control over supercharging pressure, gas-turbine inlet air temperature, or burner exit temperature. The supercharger preferably also comprises cooling means located in the air stream between the auxiliary fan and the inlet to the turbine. The air cooler is preferably a direct evaporative cooler, but could also be an indirect evaporative cooler, a cooling coil with associated mechanical or absorption refrigeration system, etc. The supercharger may also include a bypass damper that allows air to move freely around the auxiliary fan when the fan is not operating. This supercharger is especially suitable for retrofit on existing gas-turbine power plants.