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Apparatus for reducing windage loss of steam turbines

a technology of wind turbines and accessories, which is applied in the direction of steam engine plants, steam accumulators, machines/engines, etc., can solve the problems of reducing the operation of steam turbines and causing damage to buckets, and achieve the effect of reducing or preventing windage loss of steam turbines and reducing or minimizing damage to last-stage buckets

Inactive Publication Date: 2017-12-28
DOOSAN HEAVY IND & CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present disclosure is about an apparatus that can reduce or prevent windage loss in steam turbines. The apparatus includes a turbine unit, a condenser, a tank unit, a steam supplier, a sensor, and a controller. The main technical effect of the invention is to minimize damage to the last-stage bucket of a high-pressure turbine caused by windage loss, which happens when the medium-pressure turbine is started up quickly. By adding additional steam to the inlet and outlet stages of the high-pressure turbine, the apparatus can prevent the temperature at the outlet stage from rising too quickly, and thus avoid damage to the turbine.

Problems solved by technology

In a case in which the windage phenomenon is continued, a turbine positioned at the last stage of the high-pressure turbine that is heated as described above causes damage to a bucket.
When the turbine positioned at the stage is damaged, operation thereof needs to be stopped.

Method used

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  • Apparatus for reducing windage loss of steam turbines
  • Apparatus for reducing windage loss of steam turbines
  • Apparatus for reducing windage loss of steam turbines

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Experimental program
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second embodiment

[0076]An apparatus for reducing or preventing windage loss of steam turbines according to the present disclosure will be described with reference to the drawings.

[0077]Referring to FIGS. 6 to 8, an apparatus for reducing or preventing windage loss of steam turbines according to a second embodiment of the present disclosure includes a turbine unit 100 including a high-pressure turbine 110, a medium-pressure turbine 120, and a low-pressure turbine 130, a condenser 200 in which steam passing through the low-pressure turbine 130 is supplied and heat-exchanged, a tank unit 300 in which steam generated at the time of operation of the turbine unit 100 is converted into condensed water after being condensed, and stored, a steam supplier 4000 supplying additional steam to an inlet stage 111 and an outlet stage 112 of the high-pressure turbine 110 to minimize a rapid rise in temperature at the outlet stage 112 of the high-pressure turbine 110 due to speed-up of the medium-pressure turbine 120...

first embodiment

[0081]Since main configurations of the present embodiment are similar to those of the aforementioned first embodiment, the steam supplier 4000 having different configuration will be mainly described.

[0082]The steam supplier 4000 supplies additional steam to the inlet stage 111 of the high-pressure turbine 110 to minimize a rapid rise in temperature at the outlet stage 112 of the high-pressure turbine 110 due to speed-up of the medium-pressure turbine 120 under a condition that the condenser 200 is not operated.

[0083]The steam supplier 400 includes a first extension pipe 4100 extending toward between a second-stage turbine and a third-stage turbine among the turbines configuring the high-pressure turbine 110, a third extension pipe 4200 extending toward the last stage of the high-pressure turbine 110, and a steam generator 4300 supplying steam to the first and third extension pipes 4100 and 4200.

[0084]The first and third extension pipes 4100 and 4200 are pipes or tubes having a gener...

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Abstract

An apparatus for reducing windage loss of steam turbines according to an embodiment of the present disclosure is to reduce or minimize damage to a blade caused by a rise in temperature at an outlet stage of a high-pressure turbine.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to Korean Patent Application No. 10-2016-0080323, filed on Jun. 27, 2016, the disclosure of which is incorporated herein by reference in its entirety.BACKGROUND[0002]Exemplary embodiments of the present disclosure relate to an apparatus for reducing or preventing windage loss of steam turbines for reducing or minimizing damage to a blade caused by a rise in temperature at an outlet stage of a high-pressure turbine due to operation of the steam turbine.[0003]Generally, steam is supplied to a heat supply and storage tank after a high-pressure turbine. When a medium-pressure turbine is started-up for cogeneration in a state in which a condenser is not operated, the high-pressure turbine is rotated and a temperature at an outlet stage of the high-pressure turbine rapidly rises occurs. The rapid rise in temperature at the outlet stage may be referred to as a windage loss phenomenon.[0004]In a case in which the w...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01K13/02F01K11/02F01K7/16F01K13/00F01K1/04
CPCF01K13/02F01K7/16F01K1/04F01K13/003F01K11/02F01K13/025Y02E20/14F01D25/12F01K21/06
Inventor LEE, JE YOUNGYANG, SEONG JONGKANG, SANG WOOKSON, HYUN WOOLEE
Owner DOOSAN HEAVY IND & CONSTR CO LTD