Steam Turbine Plant

a steam turbine and plant technology, applied in steam engine plants, leakage prevention, machines/engines, etc., can solve the problems of reducing the efficiency of the gas turbine (heat source device) and the rated load so as to reduce the differential effectively using the heat in the plant, and reducing the thermal expansion of the steam turbine.
US20170254225A1Inactive Publication Date: 2017-09-07MITSUBISHI HITACHIPOWER SYST LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
MITSUBISHI HITACHIPOWER SYST LTD
Publication Date
2017-09-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

A steam turbine plant of the present invention includes a heat source device that heats a low temperature fluid by a heat source medium to obtain a high temperature fluid, a steam generating device that generates steam by heat exchange with the high temperature fluid, a steam turbine that is driven by the steam, a heating flow path that is disposed on an outer surface of a casing of the steam turbine, a high temperature fluid supply passage that is branched from a flow path of the high temperature fluid in the steam generating device, is connected to the heating flow path, and supplies the high temperature fluid to the heating flow path, and a high temperature fluid flow rate regulating device that regulates a flow rate of the high temperature fluid flowing through the high temperature fluid supply passage.
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Description

BACKGROUND OF THE INVENTION

[0001] Field of the Invention

[0002] The present invention relates to a steam turbine plant provided with a steam turbine such as a combined cycle power plant or a coal-fired power plant.

[0003] Background Art

[0004] Since the power generation amount varies greatly in a power generation plant using renewable energy represented by wind power generation or solar power generation, fast start-up (in other words, starting in a shorter period of time) of a power generation plant (steam turbine plant) provided with a steam turbine is required for the stabilization of the power system.

[0005] In the fast start-up of the steam turbine, since a rotor of the steam turbine and a casing for housing the rotor are exposed to high temperature steam entering the steam turbine, the rotor and the casing are heated, and thermally expanded, and thus extend particularly in a turbine axial direction. Since a structure and heat capacity of the rotor are different from that of the casing, ...

Claims

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