STEAM POWER PLANT HAVING AN IMPROVED CONTROL RESERVE

• US 20200131940A1
• Filed: 03/21/2018
• Published: 04/30/2020
• Est. Priority Date: 03/22/2017
• Status: Active Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Becker, Stefan, Danov, Vladimir, Loeper, Thomas, Mielke, Christian
• Application Number:
  US16/494,303
• Publication Number:
  US 20200131940A1
• Time in Patent Office: Days
• CPC Class Codes: F01K 1/04 for storing steam in a liquid, e.g. Ruth's type in alkali to increase steam pressure F22B1/20
• CPC Class Codes: F01K 3/008 Use of steam accumulators of the Ruth type for storing steam in water; Regulating thereof Ruth accumulators per se F01K1/04

Abstract

A method and to an apparatus for providing additional control power of a power plant process. The power plant process includes a steam turbine connected into a water vapor circuit, having at least one high-pressure part and a medium-pressure and/or no-pressure part, which are connected to one another via a cold intermediate superheating line, a steam generator and a condenser. A steam reservoir is provided, which is formed as a Ruths reservoir and in which an encapsulated PCM reservoir is integrated. To charge the steam reservoir, hot steam is taken from the cold intermediate superheating line, between the high-pressure and the medium-pressure and/or low-pressure part of the steam turbine, and for charging, and thus for providing additional control power, steam is taken from the steam reservoir and fed back into the water vapor circuit between the steam generator and the condenser.

Claims

1. A method for providing additional control power of a power plant process comprising a steam turbine which is connected into a steam circuit and which has at least one high-pressure and one medium- and/or low-pressure part, which are connected to one another via a cold intermediate superheating line, has a steam generator and has a condenser, the method comprising:

providing a steam accumulator, wherein the steam accumulator is a Ruths accumulator into which an encapsulated PCM accumulator is integrated,

for the purpose of charging, extracting hot steam from the cold intermediate superheating line between the high-pressure and the medium- and/or low-pressure part of the steam turbine, and

for the purpose of discharging, and thus for the purpose of providing additional control power, extracting steam which is fed back into the steam circuit between the steam generator and the condenser.

2. A power plant, comprising:

a steam turbine which has a steam generator and a condenser and which is connected into a steam circuit and which has at least one high-pressure and one medium- and/or low-pressure part, which are connected to one another via a cold intermediate superheating line,

a steam accumulator for the purpose of storing and providing additional control power, wherein the steam accumulator is a Ruths accumulator into which an encapsulated PCM accumulator is integrated,

wherein the steam accumulator, for the purpose of being charged with hot steam, is connected to the cold intermediate superheating line between the high-pressure and the medium- and/or low-pressure part of the steam turbine, and, for the purpose of being discharged, is connected to the steam circuit between the steam generator and the condenser.