Patent ID: 9169782
Filing Date: 2015-10-27
Classification: F01D,F02C

Abstract:
1. A turbine to operate at part-load, comprising: a compressor to intake a fluid; a combustion chamber to heat the fluid from the compressor; a turbine section to rotate a shaft with the heated fluid from the combustion chamber, the turbine section comprising a plurality of nozzles and each nozzle having a nozzle opening defined by first and second airfoils, an inner airfoil support and an outer airfoil support, wherein a cavity extends between the outer and inner airfoil supports and circumferentially spans respective portions of the at least one of the first and second airfoils and the adjacent nozzle; a bypass circuit to generate a bypass flow by removing a portion of the fluid from the compressor and transmitting the portion of the fluid to the turbine section; and a controller to determine whether a part-load operation is selected, and to open the bypass circuit when the part-load operation is selected, wherein when the controller determines that the part-load operation is selected, the controller determines a normal part-load fluid intake to the compressor, increases the part-load fluid intake to the compressor by a predetermined first percentage above the normal part-load fluid intake, and controls the bypass circuit to remove the portion of the fluid from the compressor such that a percentage of the portion of the fluid removed from the compressor relative to the increased part-load fluid intake is less than or equal to the predetermined first percentage.