Abstract: An embodiment of the present invention has the technical effect of controlling an air preheating system integrated with a gas turbine. The present invention may offer the benefit of extending a turndown range by beating the air (hereinafter “inlet-air”) entering the compressor of the gas turbine. The present invention may also offer the benefit of increasing an efficiency of the powerplant.

Abstract: An embodiment of the present invention has the technical effect of controlling an air preheating system integrated with a gas turbine. The present invention may offer the benefit of extending a turndown range by beating the air (hereinafter “inlet-air”) entering the compressor of the gas turbine. The present invention may also offer the benefit of increasing an efficiency of the powerplant.

Abstract: A power generation system including: at least one elevated steam turbine receiving input steam at an elevated pressure and exhausting steam as low pressure steam; a low pressure steam turbine receiving low pressure steam exhausted from the elevated steam turbine, and a drive shaft for the low pressure steam turbine connected to a clutch which is reasonably coupled to a power generator, wherein the clutch has a first position in which power from the low pressure steam turbine is applied to the power generator and a second position in which power from the low pressure steam turbine is not applied to the generator.

Abstract: A steam turbine operating system includes at least a high pressure turbine section and a low pressure section; one or more control valves arranged to admit steam from a boiler to the high pressure turbine section; a condenser arranged to receive steam exhausted from the low pressure section and to convert the steam to a liquid; a top heater arranged to receive liquid from the condenser and to heat the liquid via heat exchange with steam from the high pressure section, and to return the heated liquid to the boiler; and an overload bypass valve arranged to supply steam bypassed around the one or more control valves directly to the top heater.

Abstract: Disclosed herein is a seal assembly for a rotary machine having a plurality of arcuate segments and at least one seal. The plurality of arcuate segments are arrayed in an annulus and have butt joints, each of the arcuate segments has a radially outermost surface and a downstream face. The at least one seal is arranged to minimize leakage through the butt joints. The at least one seal has a first portion configured to minimize leakage at the radially outermost surface and a second portion configured to minimize leakage at the downstream face.

Abstract: A system for heating the inlet-air of a gas turbine is provided. The system may incorporate an external energy source to increase the temperature of the inlet-air. The system may extend the turndown of a gas turbine operating at partload.

Abstract: Disclosed herein is a seal assembly for a rotary machine having a plurality of arcuate segments and at least one seal. The plurality of arcuate segments are arrayed in an annulus and have butt joints, each of the arcuate segments has a radially outermost surface and a downstream face. The at least one seal is arranged to minimize leakage through the butt joints. The at least one seal has a first portion configured to minimize leakage at the radially outermost surface and a second portion configured to minimize leakage at the downstream face.