Performance effects of combined cycle power plant with variable condenser pressure and loading

Chuang, Chia-Chin; Sue, Deng-Chern

doi:10.1016/j.energy.2004.10.003

Cited by 59 publications

(31 citation statements)

References 1 publication

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“…It can be concluded that the power output and the thermal efficiency decrease by approximately 0.45 and 0.12%, respectively, for 18C increase in temperature of the coolant extracted from environment. These results are consistent with the experimental findings of Chuang and Sue (2005).…”

Section: Efficiency Of Nuclear-power Plantsupporting

confidence: 96%

“…To increase the efficiency of the plant at most unfavourable conditions, they carried out a feasibility analysis of adding two cooling towers to the present circulating water system of this plant. Chuang and Sue (2005) stated that the power capability is significantly affected by the ambient temperature and condenser pressure in combined cycle power plants (CCPPs). To investigate the performance effects of a CCPP with variable condenser pressure and loading, they executed performance tests at three different condenser pressures in an operating CCPP and measured different power outputs in order to verify the operating conditions with different gas turbine-steam turbine combinations to meet the prearranged reduced power demand.…”

Section: Introductionmentioning

confidence: 99%

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Influence of cooling water temperature on the efficiency of a pressurized-water reactor nuclear-power plant

Durmayaz

Söğüt

2006

Int. J. Energy Res.

109

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SUMMARYIn this study, the influence of the cooling water temperature on the thermal efficiency of a conceptual pressurized-water reactor nuclear-power plant is studied through an energy analysis based on the first law of thermodynamics to gain some new insights into the plant performance. The change in the cooling water temperature can be experienced due to the seasonal changes in climatic conditions at plant site. It can also come into the question of design processes for the plant site selection. In the analysis, it is considered that the condenser vacuum varies with the temperature of cooling water extracted from environment into the condenser. The main findings of the paper is that the impact of 18C increase in temperature of the coolant extracted from environment is predicted to yield a decrease of $0.45 and $0.12% in the power output and the thermal efficiency of the pressurized-water reactor nuclear-power plant considered, respectively.

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Section: Efficiency Of Nuclear-power Plantsupporting

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Influence of cooling water temperature on the efficiency of a pressurized-water reactor nuclear-power plant

Durmayaz

Söğüt

2006

Int. J. Energy Res.

109

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“…No relationship was observable between condenser pressure and efficiency. Previous studies (11)(12)(13) and the laws of thermodynamics tell us that this relationship exists; however it appears to be more difficult to optimise directly, due to the complexity of the balance of plant introduced by this parameter, as well as the dependence of other parameters on the value of condenser pressure having a 'knock on' effect.…”

Section: Resultsmentioning

confidence: 99%

“…One such explanation is the position of the condensing step in Rankine cycle, which can be seen in Fig.1-2. The efficiency of other parameters is dependent on the condenser pressure value, and varying it has a direct effect on all steps in the cycle (11,12).…”

Section: Resultsmentioning

confidence: 99%

Analysis of Factors Affecting Thermodynamic Efficiency in Generation III+ PWR Nuclear Power Plants.

Vitlin

Naicker

Gardner

2017

PAMR

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Generation III+ reactors are the latest generation of Nuclear Power Plants to enter the market. The key evolution in these reactors is the introduction of stringent safety standards. This is done through thorough incident scenario analysis and preparation, resulting in the addition of novel active and passive auxiliary safety systems, affecting the power consumption in the balance of plant. This paper analyses the parameters of PWR power plants of similar design, to determine the parameters for optimal efficiency, regarding gross and net electrical output, determining the impact the balance of plant has on this efficiency. While two of the three main factors affecting the Rankine cycle – boiler pressure and steam temperature – behaved as theoretically expected, there was a notable point of departure with the third parameter – condenser pressure. The relationship between steam temperature and gross electrical efficiency was linear across all reactors but the relation between the steam temperature and the net electrical efficiency ceased to be linear for secondary loop steam temperatures above 290°C. The relationship between boiler pressure and both gross and net electrical efficiency was linear, proving the Rankine cycle. A relationship was not observed between the condenser pressure and either the gross or net electrical efficiency

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“…Larger systems, and larger flow systems in general are more efficient thermodynamically than smaller systems [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Ignoring cost considerations, the most efficient design is a landscape served by a few large installations, each installation allocated to an inhabited space (area).…”

Section: Introductionmentioning

confidence: 99%

Effect of size on ground-coupled heat pump performance

Alalaimi

Lorente

Anderson

et al. 2013

International Journal of Heat and Mass Transfer

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Performance effects of combined cycle power plant with variable condenser pressure and loading

Cited by 59 publications

References 1 publication

Influence of cooling water temperature on the efficiency of a pressurized-water reactor nuclear-power plant

Influence of cooling water temperature on the efficiency of a pressurized-water reactor nuclear-power plant

Analysis of Factors Affecting Thermodynamic Efficiency in Generation III+ PWR Nuclear Power Plants.

Effect of size on ground-coupled heat pump performance

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