Multi stage steam turbine for power generation
AssigneeGeneral Electric Technology GmbH
InventorsVincent Jourdain, Martin Toulemonde
Life of this patent
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Abstract
The invention relates to a steam turbine having a plurality of stages comprising a plurality of points of admission connected to a plurality of admission lines, a feed line connected to the plurality of admission lines and at least one extraction line, extending from an intermediate stage of the steam turbine, for extracting steam from the steam turbine. The at least one capacity line fluidly connects an admission lines and at least one extraction line so as to bypass the steam turbine, and is further configured to increase a swallowing capacity of the steam turbine as measured from the feed line upstream of the capacity line compared to the plurality of points of admission.
Claims9
A steam turbine having a plurality of stages, comprising:
- a plurality of points of admission in fluid communication with a plurality of admission lines;
- a feed line in fluid communication with the plurality of admission lines;
- at least one extraction line, extending from an intermediate stage of the steam turbine, for extracting steam from the steam turbine;
- and
- at least one capacity line which comprises an orifice plate and is in fluid communication with at least one of the plurality of admission lines and the at least one extraction line so as to bypass the steam turbine, and is configured to increase a swallowing capacity of the steam turbine as measured from the feed line upstream of the capacity line compared to the plurality of points of admission, and
- wherein the at least one capacity line has an internal resistance to flow such that in use the at least one capacity line increases the swallowing capacity in a range of 1 vol % to 5 vol %.
A method for increasing a swallowing capacity of a steam turbine by at least 1 vol %, the method comprising:
- providing a plurality of admission lines for feeding steam into the steam turbine at points of admission and an extraction line for extracting steam from an intermediate stage of the steam turbine;
- and
- fluidly connecting at least one admission line to the extraction line by means of a capacity line so as to bypass the steam turbine, and
- wherein the capacity line has an internal resistance to flow such that in use the capacity line increases the swallowing capacity in a range of 1 vol % to 5 vol %.
A steam turbine comprising:
- a plurality of points of admission in fluid communication with a plurality of admission lines;
- a feed line in fluid communication with the plurality of admission lines;
- at least one extraction line, extending from an intermediate stage of the steam turbine, for extracting steam from the steam turbine and exhausting the steam to a feedwater preheater;
- and
- at least one capacity line in fluid communication with at least one of the plurality of admission lines and the at least one extraction line so as to bypass the steam turbine to facilitate an increase in a swallowing capacity of the steam turbine, and
- wherein the at least one capacity line has an internal resistance to flow such that the at least one capacity line increases the swallowing capacity in a range of 1 vol % to 5 vol %.
Dependencies are inferred from the claim text.