The influence of external cooling system on the performance of supercritical steam turbine cycles

Kosman, Wojciech

doi:10.2478/v10173-010-0019-4

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…The major influence upon the equipment price have construction expenses for the boiler, main steam pipelines and the turbine flowpath [11][12][13][14]. The flowpath cost increase is mostly due to the larger share of nickel alloys.…”

Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Kindra,

Osipov,

Zlyvko

et al. 2021

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The Rankine cycle steam turbine power plants make a base for world electricity production. The efficiency of modern steam turbine units is not higher than 43-45%, which is remarkably lower compared to the combined cycle power plants. However, an increase in steam turbine power plant efficiency could be achieved by the rise of initial cycle parameters up to ultra-supercritical values: 700-780 • C, 30-35 MPa. A prospective steam superheating technology is the oxy-fuel combustion heating in a sidemounted combustor located in the steam pipelines. This paper reviews thermal schemes of steam turbine power plants with one or two side-mounted steam superheaters. An influence of the initial steam parameters on the facility thermal efficiency was identified and primary and secondary superheater parameters were optimized. It was found that the working fluid superheating in the side-mounted oxy-methane combustors leads to an increase of thermal efficiency higher than that with the traditional boiler superheating in the initial temperature ranges of 700-780 • C and 660-780 • C by 0.6% and 1.4%, respectively.

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Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Kindra,

Osipov,

Zlyvko

et al. 2021

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“…The most important is the increase of the steam parameters into the supercritical values. The increase is related to new solutions in the design of the turbines [4].…”

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confidence: 99%

Feasibility study of forced cooling of a supercritical steam turbine after a shut down of a power generating unit

Kosman¹

2011

Archives of Thermodynamics

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Feasibility study of forced cooling of a supercritical steam turbine after a shut down of a power generating unitTemperature related decrease of steam turbine components is one of the main transient processes that occur during a typical long-term operation. With a natural cooling (no user interference) it takes more than 14 days before the temperature of components reaches the level that allows to open and repair a turbine. It is then reasonable to apply a forced cooling in order to decrease the time between a shut-down of a power generating unit and a beginning of a repair. This paper presents the analysis of application of a forced cooling process to supercritical steam turbines. The main problems under the investigation are the safety issues of the process and the optimization of cooling conditions. The paper describes the safety restrictions and the optimization criteria. The process is analyzed in numerical simulations conducted for various cooling conditions.

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Exergy analysis of a 1000 MW double reheat ultra-supercritical power plant

Zhao

et al. 2017

Energy Conversion and Management

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The influence of external cooling system on the performance of supercritical steam turbine cycles

Cited by 4 publications

References 4 publications

Archives of Thermodynamics

Archives of Thermodynamics

Feasibility study of forced cooling of a supercritical steam turbine after a shut down of a power generating unit

Exergy analysis of a 1000 MW double reheat ultra-supercritical power plant

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