초록 ▼

A method and apparatus are disclosed for alleviating the problem of windage heating when flow, in a turbine running at full speed, no load, decreases greatly at the exhaust of the high pressure sections of the turbine. Valves connecting the different pressure levels of a heat recovery steam generato

A method and apparatus are disclosed for alleviating the problem of windage heating when flow, in a turbine running at full speed, no load, decreases greatly at the exhaust of the high pressure sections of the turbine. Valves connecting the different pressure levels of a heat recovery steam generator to the input of the turbine are adjusted to mix steam coming from the different pressure levels to create desired steam conditions at the inlet and the exhaust output of the turbine that allow the use of existing steam path hardware and thereby reduce the cost of such piping. In an alternative embodiment for a single pressure HRSG, high pressure saturated steam is extracted from the HSRG evaporator and then flashed into superheated steam when passing thru a control valve, that is then used to create the desired steam conditions at the inlet and the exhaust output of the turbine.

대표청구항 ▼

What is claimed is: 1. An apparatus for reducing, at the exhaust of a turbine, high steam temperatures due to windage heating when the turbine is running at full speed, no load, the apparatus comprising:the turbine comprising an inlet, and an exhaust output,a heat recovery steam generator with at le

What is claimed is: 1. An apparatus for reducing, at the exhaust of a turbine, high steam temperatures due to windage heating when the turbine is running at full speed, no load, the apparatus comprising:the turbine comprising an inlet, and an exhaust output,a heat recovery steam generator with at least one source of producing steam having a first pressure lower than a second pressure of steam within the turbine when the turbine is experiencing windage heating when running at full speed, no load, the source of steam production being connected to the turbine inlet, andat least one flow control apparatus that is adjustable to control the flow of steam to the turbine inlet from the at least one source of steam production,the at least one apparatus being adjusted to input the first lower pressure steam into the turbine inlet to thereby create first steam conditions at the turbine inlet that are lower in pressure and temperature than second steam conditions at the turbine exhaust output to thereby reduce high steam temperatures due to windage heating at the turbine exhaust output.