Physical model to investigate the effect of the thermal discharge on the mixing zone (Case Study: North Giza Power Plant, Egypt)

El-Ghorab, Entesar Abdallh Soliman

doi:10.1016/j.aej.2012.12.003

Cited by 8 publications

(7 citation statements)

References 4 publications

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“…Reported works display different approaches to simulate the effect of thermal plumes on the receiving waters: simple models to account for thermal stratification of the water column (Kirillin et al, 2013), mixed approaches using physical and numerical models (El-Ghorab, 2013), schematic studies using 2D ) or 3D numerical models (You-liang & Jing, 2011, and Lagrangian coherent structures (Wei et al, 2013). The Sines power plant is similar to other energy production units with water pumped into the power plant to cool the turbines and then channeled back into the sea, lake or river via an open canal (Klein & Lichter, 2006;Ingleton & McMinn, 2012;Kirillin et al, 2013).…”

Section: The Choice Of Modelmentioning

confidence: 99%

“…Therefore, the forecast of the thermal plume transport and dispersion in the receiving water body is critical to assess its environmental exposure. There are several methodologies to study thermal plume behavior, ranging from physical models (El-Ghorab, 2013), to in situ data analysis (e.g. Jan et al, 2004;Hunt et al, 2010) to the use of numerical models (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Modelling the thermal effluent of a near coast power plant (Sines, Portugal)

Salgueiro

Pablo

Neves

et al. 2015

RGCI

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The present work is focused on the dispersion of a thermal effluent, produced by the Sines power plant, Portugal, along coastal waters. This facility intakes a yearly average around 40 m 3 /s of seawater, for the required cooling process, which is subsequently discharged back to the ocean at a 10 ºC increase in temperature. A three-dimensional hydrodynamic local model was nested into a regional model and set up to simulate the transport of the thermal effluent during two distinct periods, August and October 2013, respectively featuring dominant north and south wind. The simulations were performed for both situations, with and without the thermal discharge, where the later provides baseline scenarios. Obtained model results closely followed the existing field data. The temperature increase is shown to decay from 10 ºC near the outlet vicinity to 2 ºC at a distance of 2 km from the outlet for both scenarios. Even though the main driving force of this phenomenon is the wind, tidal conditions also have additional influence on thermal plume dispersion near the discharge area. In the north wind scenario the plume extends away from the coast while under south wind dominance the plume is contained near the coast, extending towards the inlet. As a consequence there is a positive feedback under south wind dominance, which is caused by the intake of already warm water from the thermal plume itself. Consequently, south wind dominance is the most unfavorable scenario for both coastal environment and the operational efficiency of the power plant. RESUMOModelação de um efluente térmico numa zona costeira (central termoelétrica de Sines, Portugal) Este artigo tem como objetivo estudar a dispersão do efluente térmico da central termoelétrica de Sines (Portugal) na zona costeira. Esta central retira em média 40 m 3 /s de água do oceano Atlântico que após o processo de refrigeração é restituída à fonte através de dois canais, com uma temperatura de 10º C acima daquela que tinha na zona de captação. De modo a estudar o transporte deste efluente térmico foi implementado um modelo hidrodinâmico tridimensional acoplado a um modelo regional. Foram simulados e analisados dois cenários de ventos diferentes, vento predominante do quadrante norte e vento predominante do quadrante sul. Para cada tipo de vento são comparados os resultados para a situação com e sem descarga. Os resultados obtidos com o modelo evidenciam a anomalia térmica, observável nos dados de campo, mostrando um aumento variável entre 10º C, na região próxima à descarga, até 2º C a cerca de 2 km da mesma área, para ambos cenários. Contudo, enquanto que no cenário de vento norte se observa uma pluma térmica estreita, ao longo da costa, no caso do vento sul observa-se uma pluma mais confinada à região da saída do efluente. O vento sul é o cenário mais desfavorável à eficiência da This article contains supporting information online at http://www.aprh.pt/rgci/pdf/rgci-577_Salgueiro_Supporting-Information.pdf central uma vez que nesta situação a pluma é direcionada para zona de...

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Section: The Choice Of Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modelling the thermal effluent of a near coast power plant (Sines, Portugal)

Salgueiro

Pablo

Neves

et al. 2015

RGCI

View full text Add to dashboard Cite

show abstract

“…The first treatments addressed the equilibrium iso-contour of elevated temperature within the receiving waters. Slightly later more advanced models allow the analysis of thermal plumes across extensive data in relation to seasonal and climate change fluctuations [3,[8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Optimal Control of Thermal Pollution Emitted by Power Plants

Babacar¹,

Matar²,

Mamadou³

2020

Numerical Modeling and Computer Simulation

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The coastal areas near thermal or nuclear plants are subject to hot water discharges produced by cooling processes. These activities induce an increase of the temperature near the outlet vicinity, which can extend for miles. The temperature variation affects the metabolic rate of organisms and the level of dissolved oxygen. Cooling by cold water from an additional discharge can be considered in order to limit this thermal pollution. This paper present a methodology based on the implementation of a two-dimensional numerical model to study the dynamic of the temperature originated from the industrial discharges. Moreover the optimal injection rate of cold water is sought to keep the water temperature as close as possible to the survival of the ecosystem. Numerical simulations are performed to illustrate the efficiency approach.

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“…For simplified approximations, the geometrical shape reduced to an elliptical distribution of surface isotherm contours. Entesar and El-Ghorab [7] physically modelled a portion of Nile river at north Giza power plant by scale ratio of 1:50 and tried to evaluate the mixing zone. They reported that mixing zone depends on the flow regime, the effluent discharge and the excess temperature above the ambient at the outfall.…”

Section: Introductionmentioning

confidence: 99%

Analysis of dispersion of heated effluent from power plant: a case study

et al. 2017

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Thermal dispersion of heated effluent in a lake near nuclear power plant is analysed. Lake Bathymetry is established by data collection at a pre-planned matrix of sample points in the lake. Threedimensional geometric model of the lake is developed based on the geometric data collected, using a high accuracy GPS and a dead weight based depth meter at respective sample points of the lake matrix. A turbine type digital flow meter is used to measure the velocities at the intake and blow down points of the lake. Numerical analysis of flow and thermal dispersion is carried out using PLIC-VOF two-phase model with the two-equation k-epsilon model for turbulence closure. Numerical results for varying flow and blow down temperature conditions and wind speed are studied. It is observed that the thermal gradients are steeper in the curved area near the blowdown point. Small increase in main inlet (inlet II) velocity suppresses the dispersion of high-temperature contours significantly. Thermal discharge and dispersed temperature is monitored using temperature sensor mounted floating buoy at various locations in the lake. It is established that the thermal dispersion is influenced by wind velocity and the presence of water hyacinth in the lake.

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Physical model to investigate the effect of the thermal discharge on the mixing zone (Case Study: North Giza Power Plant, Egypt)

Cited by 8 publications

References 4 publications

Modelling the thermal effluent of a near coast power plant (Sines, Portugal)

Modelling the thermal effluent of a near coast power plant (Sines, Portugal)

Optimal Control of Thermal Pollution Emitted by Power Plants

Analysis of dispersion of heated effluent from power plant: a case study

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