The influence of condenser cooling water temperature on the thermal efficiency of a nuclear power plant

Attia, Sami I.

doi:10.1016/j.anucene.2015.02.023

Cited by 69 publications

(26 citation statements)

References 18 publications

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“…The complexity of the balance of plant introduced by condenser pressures significantly below atmospheric pressure may also be a factor, introducing working input in machinery and piping that is not considered in the fundamental Rankine cycle TS diagram (13). No relationship was observable between condenser pressure and efficiency.…”

Section: Resultsmentioning

confidence: 99%

“…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%

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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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Section: Resultsmentioning

confidence: 99%

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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“…The regulation then not only allows for a particular heat exchange between the fluids, but also considers relations among the velocity of the cooling water flow, the erosion and deposition of pollutants on the surface of heat exchange as well as the costs of pumping the cooling water. In publications [2,8] the influence of exploitation conditions of turbine steam condensers on power plant efficiency was proved.…”

Section: Krzysztof łUkaszewskimentioning

confidence: 99%

“…shows that the reliability ,,, (2) ps r e i R of the steam turbine condenser in the second year of exploitation for assumed, considering the ground for effective heat transfer, regulation of the heat exchange surface depending on given exploitation conditions W e,i is the following in respect to Fig.3 The next example of calculations, illustrated with Fig.9., concerns with application of formulas (15), (16), (17) and given exploitation conditions W e,i , which determine enabling the cooling water flow through 8000 pipes of 12000 total.…”

Section: Science and Technologymentioning

confidence: 99%

Adaptive reliability structures of heat exchange surface in turbine condenser

Łukaszewski¹

2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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Article citation info: (*) Tekst artykułu w polskiej wersji językowej dostępny w elektronicznym wydaniu kwartalnika na stronie www.ein.org.pl IntroductionThe aim of the paper is to prove adaptive reliability structures of heat exchange surface, which stems from the matter of regulating the surface in order to maintain effective process of heat exchange by sustaining the requested pressure of steam condensation in variable exploitation conditions, which determines changes in the pipe system of the condenser and involves assessment of reliability of its surface of heat exchange.Adaptive reliability structures of surface of heat exchange (pipe subsystem) are the reliability structures, which are altered in the course of adjusting the pipe system to the actual exploitation conditions of the condenser in the power system.Having delved into the current state of the art with IT data bases (Science Direct, Knovel, Nauka Polska, BazTech, google) it was concluded that there has been no algorithm for assessing reliability of surface of heat exchange of steam turbine condenser which would include regulation of the surface in order to exchange the heat effectively and sustain the requested pressure of steam condensation in variable exploitation conditions, which has a significant influence on the quality of the technical power system exploitation, in which the condenser is a part.Publication [10] shows that sustaining given pressure of steam condensation in the condenser in variable conditions is vital for maintaining requested power efficiency of the technical power system. The aforementioned publication puts forward a particular technical solu-

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“…Rafal Laskowski [6] has analysed steam condenser performance in off-design conditions as the function of inlet parameters. Sami I. Attia [7] has analyzed the influence of condenser cooling water temperature on the thermal efficiency of a nuclear power plant. …”

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confidence: 99%

Performance Analysis of Surface Condenser in 525MW Thermal Power Plant

Masiwal¹,

P.S²,

Chaudhary³

2017

IJET

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Abstract-This paper presents off design performance evaluation and calculation methodology of a surface type condenser. Best condenser pressure which can be achieved in actual off design conditions has been evaluated by real time parameters. Condenser performance study has been carried out for cooling water flow, cooling water inlet temperature, and for air ingress/dirty tubes. This method can be proved useful in the case where no curve regarding variation of condenser back pressure verses cooling water inlet temperature is available. All data for performance has been collected and evaluated from a 525MW operating unit of Bharat Heavy Electricals Limited.Keyword -Surface Condenser; Heat Transfer; Steam Condenser; Heat Load; Condenser performance; Power Plant I. INTRODUCTION This paper is based on performance analysis of condenser in a 525MW thermal power plant. A thermal power plant consists of five major components -(1) boiler, (2) steam turbines -high pressure turbine, intermediate pressure turbine and low pressure turbine, (3) condenser, (4) feed water pumps -condensate extraction pumps and boiler feed pumps, (5) feed water heaters -one feed water heater (steam bled from high pressure turbine exhaust), one feed water heater (steam bled from intermediate pressure turbine) and three feed water heater for which steam is bled from low pressure turbine [1]. In boiler, constant pressure heating of feed water takes place in economizer, evaporator and in superheater. Superheated steam then goes to high pressure turbine, expands to produce work. Some part of steam is extracted here for feed water heating process. Steam then is reheated to high temperature and enters in intermediate pressure turbine. Some steam is again bled for regeneration process. Steam then enters in low pressure turbine where again some portion of steam is extracted for feed water heating process. After passing through the low pressure turbine, steam goes to condenser where this steam converts into saturated water. Low pressure feed water pumps (condensate extraction pumps) pump condensate water to the low pressure heaters where this condensate water gets some heat from extracted steam. After low pressure heaters, condensate water goes to Deaerator and then with the help of high pressure feed water pumps (boiler feed pumps) feed water enters the boiler via high pressure heaters. And this way whole cycle repeats itself. Condenser is an essential component in thermal power plant. It is a type of heat exchanger in which steam undergoes phase change by giving latent heat and converts into water. In turn coolant water gains sensible heat. As specific volume of steam is more than that of specific volume of condensed water. A vacuum (negative pressure) develops in shell side of condenser which extracts more steam from low pressure turbine exhaust and thus creates a self suction natural phenomenon. Condenser reduces the turbine exhaust pressure so as to increase the specific output of turbine. Vikram Haldkar, Abhay kumar sharma, R.K Ranjan, and V.K Bajpai...

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The influence of condenser cooling water temperature on the thermal efficiency of a nuclear power plant

Cited by 69 publications

References 18 publications

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

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

Adaptive reliability structures of heat exchange surface in turbine condenser

Performance Analysis of Surface Condenser in 525MW Thermal Power Plant

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