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US 2011/0214426 A1Published application
Turbine system including valve for leak off line for controlling seal steam flow
AssigneeGeneral Electric Company
InventorsMahendra Singh Mehra, Nestor Hernandez Sanchez, Jegadeesan Maruthamuthu, Rajasekar Natarajan, Manikandan Srinivasan
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Abstract
A turbine system includes a valve coupled to a leak off line from a leak packing of a first turbine, the valve controlling a first steam flow used to maintain a constant self-sustaining sealing pressure to a second turbine across numerous loading conditions. A related method is also provided.
Claims20
A steam turbine system comprising:
- a high pressure (HP) turbine operatively coupled to an intermediate pressure (IP) turbine and a low pressure (LP) turbine;
- a steam seal header for maintaining a constant self-sustaining sealing pressure to the LP turbine using a first steam flow in a seal steam line from a seal packing of the HP turbine;
- a leak off line coupling a leak packing of the HP turbine to the IP turbine;
- and
- a valve coupled to the leak off line for controlling the first steam flow to the steam seal header.
2 more elements
A method of operating a turbine system, the method comprising:
- providing a high pressure (HP) turbine operatively coupled to an intermediate pressure (IP) turbine and a low pressure (LP) turbine, and a leak off line coupling a leak packing of the HP turbine to the IP turbine;
- and maintaining a constant self-sustaining sealing pressure to the LP turbine by controlling, during non-full load operations, a valve coupled to the leak off line to control a first steam flow used to seal the LP turbine.
A turbine system comprising:
- a valve coupled to a leak off line from a leak packing of a first turbine, the valve controlling a first steam flow used to maintain a constant self-sustaining sealing pressure to a second turbine.
Dependencies are inferred from the claim text.