Research of parameter distributing simulation and modeling for the condenser in nuclear power plant

Gong, Meijie; Peng, Minjun; Zhu, Haitao

doi:10.1016/j.anucene.2019.05.030

Cited by 12 publications

(3 citation statements)

References 31 publications

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“…Work [15] considers the issue of renovation of NPP generating units by introducing automatic diagnostics of low-potential complexes (LPC) of turbine equipment. The author emphasizes that the main reasons for the load reduction are determined by the operating conditions of the LPC -an increase in the temperature of the cooling water and a deviation of the steam pressure in the condenser from the normal value.…”

Section: On the Principle Of «Block-modular» Design Developed By Pjsc «Turboatom» And The Characteristics Of The Condenser Provided By Thmentioning

confidence: 99%

Determination of the electrical power increase at the generator terminals of a nuclear power plant unit at different condenser states

Bratkovska

Liush

2021

EEJET

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It is shown that the technical condition of condensing devices of steam turbines largely determines the amount of electricity losses, reliable and economical operation of NPP units. Analysis of the heat transfer process in the condenser showed that the main causes of load reduction are determined by rising cooling water temperature and deviation of steam pressure from normal value. It is shown that among diagnostic parameters except leakage volumes there must be an assessment of contamination of the heat transfer surface which significantly affects the reduction of electricity generation. The modernization main points of the condenser of the Zaporizhzhya NPP power unit No. 3 on the principle of "block-modular" design developed by PJSC "Turboatom" and the characteristics of the condenser provided by the new design are considered. To reflect the real mode of operation of the condensing unit, it is proposed to model the contamination of the heat exchange surface and the presence of leakages in the condenser space using the method of thermal calculation of the condenser by iterative methods. It was found that reducing the increase in electricity generation as a result of the effects of the study factors can partially or even completely absorb the effect of upgrading the condenser plant. It will provide a significant increase in electricity generation with relatively low capital investment compared to construction of new NPP power units and improve the accuracy of power generation forecasts.

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Section: On the Principle Of «Block-modular» Design Developed By Pjsc «Turboatom» And The Characteristics Of The Condenser Provided By Thmentioning

confidence: 99%

Determination of the electrical power increase at the generator terminals of a nuclear power plant unit at different condenser states

Bratkovska

Liush

2021

EEJET

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“…Nuclear power generation technology is obviously a safe and economical way of generating power in modern society [1]. As the low temperature heat source, the condenser of the nuclear power technology condenses the steam into condensate water and then establishes a certain degree of vacuum at the exhaust port of the turbine [2,3]. Therefore, the operation of condenser is critical to the nuclear power generation tehcnology.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of the Tube Bundle Arrangement on the Performance of Condenser in Nuclear Power Plant

Dong¹,

Sun²

2023

J. Phys.: Conf. Ser.

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Nuclear power generation technology is obviously a safe and economical way of generating power in modern society. As the low temperature heat source, the condenser of the nuclear power technology condenses the steam into condensate water and then establishes a certain degree of vacuum at the exhaust port of the turbine. The operation of condenser is critical to the nuclear power generation technology. In this paper, the influences of the arrangement of tube bundles on the condenser of nuclear power generation technology were investigated. Three types of condensers, including the church window type, the centripetal type, and the UT type, were analyzed using Ansys Fluent software. The steam flow velocity distribution, air concentration distribution, temperature distribution, and heat transfer coefficient distribution were studied. Under specific design conditions, the flow velocity in the church window type was large, the exhaust air concentration was small, the maximum flow rate distribution was relatively reasonable, and the air concentration distribution was more concentrated. The performances of the centripetal type and the UT type were slightly worse, and the steam condensation was less. In contrast, the condensation of the church window type was large, the relative performance was high, and the heat transfer performance was better.

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“…Condensers play important roles in different systems, such as air conditioning [1,2], heat pumping [3], refrigeration [4,5], nuclear [6,7], chemical [8,9], etc. Nowadays, condensers with mini/micro-channels are used instead of conventional channels in many industries [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Robust and General Model to Forecast the Heat Transfer Coefficient for Flow Condensation in Multi Port Mini/Micro-Channels

et al. 2022

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A general correlation for predicting the two-phase heat transfer coefficient (HTC) during condensation inside multi-port mini/micro-channels was presented. The model was obtained by correlating the two-phase multiplier, with affecting parameters using the genetic programming (GP) method. An extensive database containing 3503 experimental data samples was gathered from 21 different sources, including a broad range of operating parameters. The newly obtained correlation fits the broad range of measured data analyzed with an average absolute relative deviation (AARD) of 16.87% and estimates 84.73% of analyzed data points with a relative error of less than 30%. Evaluation of previous correlations was also conducted using the same database. They showed the AARD values ranging from 36.94% to 191.19%. However, the GP model provides more accurate results, AARD lower than 17%, by considering the surface tension effects. Finally, the effect of various operating parameters on the HTC was studied using the proposed correlation.

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Research of parameter distributing simulation and modeling for the condenser in nuclear power plant

Cited by 12 publications

References 31 publications

Determination of the electrical power increase at the generator terminals of a nuclear power plant unit at different condenser states

Determination of the electrical power increase at the generator terminals of a nuclear power plant unit at different condenser states

Study on the Influence of the Tube Bundle Arrangement on the Performance of Condenser in Nuclear Power Plant

Robust and General Model to Forecast the Heat Transfer Coefficient for Flow Condensation in Multi Port Mini/Micro-Channels

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