Menu:

 

 

Volume 15, Issue 4 - December 2015

 

Download (619KB, PDF)

 

 

  • Abstract / Resumo
  • References / Bibliografia
  • Citations / Citações

Revista de Gestão Costeira Integrada
Volume 15, Número 4, Dezembro 2015, Páginas 533-544

DOI: 10.5894/rgci577
* Submission: 8 JAN 2015; Peer review: 1 MAR 2015; Revised: 20 MAY 2015; Accepted: 26 JUN 2015; Available on-line: 29 JUN 2015  

Supporting Information (555KB, PDF)


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

D. V. Salgueiroa; H. de Pabloa; R. Nevesa; M. Mateusa


@ - Corresponding author to whom correspondence should be addressed.
a - MARETEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal.     


ABSTRACT
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 m3/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.

Keywords: Thermal discharge; Three-dimensional model; Coastal hydrodynamics; Water temperature   


Modelação de um efluente térmico numa zona costeira (central termoelétrica de Sines, Portugal)

RESUMO
Modelação 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 m3/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 central uma vez que nesta situação a pluma é direcionada para zona de captação. Assim conclui-se que o vento tem um papel preponderante na dispersão do efluente térmico. Os resultados do modelo mostram ainda que a maré também influência a dispersão, sobretudo na zona junto à descarga. 

Palavras-chave: Efluente térmico; Modelo tridimensional; Hidrodinâmica Costeira; Temperatura da água

 

Abbaspour, M.; Javid, A.H.; Moghimi, P.; Kayhan, K. (2005) - Modelling of thermal pollution in coastal area and its economical and environmental assessment. International Journal of Environmental Science & Technology, 2(1):13-26. DOI: 10.1007/BF03325853

Abdel-Latif, M.; Kotb, O. (2010) - Investigating the Environmental
Impact of Power Plant Intakes and Outfalls under Tidal Influence (Case Study: Suez Gulf-Egypt). Nile Basin Water Science & Engineering Journal, 3(2):52-63. Available on-line at http://www.nilebasin-journal.com/
PDFFiles/5.pdf


Agarwal, S.K. (2005) - Thermal pollution. In: S. K. Agarwal, Water
Pollution, pp.127-136, APH Publishing Corporation, New Delhi, India. ISBN: 9788176488327.

Arieli, R.N.; Almogi-Labin, A., Abramovich, S.; Herut, B. (2011) - The effect of thermal pollution on benthic foraminiferal assemblages in the Mediterranean shoreface adjacent to Hadera power plant (Israel). Marine Pollution Bulletin, 62(5):1002-1012.
DOI: 10.1016/j.marpolbul.2011.02.036

Ascione, K.I.; Campuzano, F.; Franz, G.; Fernandes, R.; Viegas, C.;
Sobrinho, J.; De Pablo, H.; Amaral, A.; Pinto, L.; Mateus, M.; Neves, R. (2014) - Advances in modeling of water quality in estuaries. In: C.W. Finkl & C. Makowski (eds), Advances in Coastal abd Marine Resources: Remote Sensing and Modeling. Advances in Coastal and Marine Resources. Part II, pp. 237-276, Springer International Publishing, Switzerland. ISBN: 978-3319063256. DOI: 10.1007/978-3-319-06326-3_10

Barton, E.D. (2001) - Canary and Portugal currents. In: Steele, J.H.;
Thorpe, S.A.; Turekian, K.K. (eds.). Encyclopedia of Ocean Sciences, pp.380-389, Academic Press. DOI: 10.1006/rwos.2001.0360

Bedri, Z.; Bruen, M.; Dowley, A.; Masterson, B. (2013) - Environmental
consequences of a power plant shut-down: A threedimensional water quality model of Dublin Bay. Marine Pollution Bulletin, 71(1):117-128. DOI: 10.1016/j.marpolbul.2013.03.025.

Canuto, V.M.V.; Howard, A.; Cheng, Y.; Dubovikov, M.S.M. (2001) - Ocean Turbulence. Part I: One-Point Closure Model-Momentum and Heat Vertical Diffusivities, Journal of Physical Oceonagraphy, 31(6):1413-1426.
DOI:10.1175/1520-0485(2001)031<1413:OTPIOP>2.0.CO;2

Chippada, S.; Dawson, C.N.; Martinez-Canales, M.L.; Wheeler, M. F. (1998) - Finite element approximations to the system of shallow water equations, Part II: Discrete-time a priori error estimates. SIAM journal on numerical analysis, 36(1):226-250.
DOI: 10.1137/S0036142995296515

Choi, K.H.; Kim, Y.O.; Lee, J.B.; Wang, S.Y.; Lee, M.W.; Lee, P.G.; Ahn, D.S.; Hong, J.S.; Soh, H.Y. (2012) - Thermal impacts of a coal power plant on the plankton in an open coastal water environment. Journal of Marine Science and Technology (ISSN: 1023-2796), 20(2):187–194, National Taiwan Ocean University, Keelung, Taiwan. Available on-line at
http://jmst.ntou.edu.tw/marine/20-2/187-194.pdf

Chuang, Y.L.; Yang, H.H.; Lin, H.J. (2009) - Effects of a thermal discharge from a nuclear power plant on phytoplankton and periphyton in subtropical coastal waters. Journal of Sea Research, 61(4):197-205. DOI: 10.1016/j.seares.2009.01.001

Coulter, D.P.; Sepúlveda, M.S.; Troy, C.D.; Höök, T.O. (2014) - Thermal habitat quality of aquatic organisms near power plant discharges: potential exacerbating effects of climate warming Fisheries. Management and Ecology, 21(3):196-210. DOI: 10.1111/fme.12064

de Pablo, H.; Brito, D.; Mateus, M.; Trancoso, A.R.; Campuzano, F.J.; Pinto, L.; Neves, R. (2013) - An integration methodology to estimate water fluxes and constituents budgets in coastal areas: application to the Tagus coastal area. In: M. Mateus & R. Neves (eds.) Ocean modelling for coastal management. Case studies with MOHID, pp 213-224, IST Press, Lisbon, Portugal. ISBN: 978-989-8481-24-5. Available on-line at: http://www.mohid.com/publicdata/products/
bookpapers/2013_mohidbook_c01.pdf


El-Ghorab, E.A.S. (2013) - Physical model to investigate the effect of the thermal discharge on the mixing zone (Case Study: North Giza Power Plant, Egypt). Alexandria Engineering Journal, 52(2):175-185.
DOI: 10.1016/j.aej.2012.12.003

Eloranta, P.V. (1983) - Physical and chemical properties of pond waters receiving warm-water effluent from a thermal power plant. Water research 17(2):133-140 DOI: 10.1016/0043-1354(83)90092-1

Fiúza, A.F.G. (1983) - Upwelling patterns off Portugal. In: Erwin Suess & Jörn Thiede, (eds.), Coastal Upwelling its sediment record, pp.85-98, NATO Conference Series Volume 10B, Springer US.
ISBN: 9781461566533.

Flather, R. A. (1976) - A tidal model of the northwest European
continental shelf. Memoires Societe Royale des Sciences de Liege, 10(6):141-164.

Fossati, M.; Piedra-Cueva, I. (2013) - A 3D hydrodynamic numerical model of the Río de la Plata and Montevideo’s coastal zone. Applied Mathematical Modelling, 37(3):1310-1332.
DOI:10.1016/j.apm.2012.04.010

Fossati, M.; Santoro, P.; Urrestarazu, S.; Piedra-Cueva, I. (2011) - Numerical study of the effect of a power plant cooling water discharge in the Montevideo Bay. Journal of Applied Mathematics, 2011. DOI:10.1155/2011/970467

Hester, E.T.; Doyle, M.W. (2011) - Human Impacts to River Temperature
and Their Effects on Biological Processes: A Quantitative Synthesis1. Journal of the American Water Resources Association, 47(3):571-587. DOI: 10.1111/j.1752-1688.2011.00525.x

Holmes, N. (1970) - Marine fouling in power stations. Marine Pollution
Bulletin, 1(7):105-106. DOI: 10.1016/0025-326X(70)90217-1

Hunt, C.D.; Mansfield, A.D.; Mickelson, M.J.; Albro, C.S.; Geyer, W.R.; Roberts, P.J. (2010) - Plume tracking and dilution of effluent from the Boston sewage outfall. Marine Environmental Research, 70(2):150-161. DOI: 10.1016/j.marenvres.2010.04.005.

Ingleton, T.; McMinn, A. (2012) - Thermal plume effects: A multidisciplinary approach for assessing effects of thermal pollution on estuaries using benthic diatoms and satellite imagery. Estuarine, Coastal and Shelf Science, 99:132-144. DOI: 10.1016/j.ecss.2011.12.024

Jan, S.; Chen; C. T. A.; Tu, Y. Y.; Tsai, H. S. (2004) - Physical properties of thermal plumes from a nuclear power plant in the southernmost Taiwan. Journal of Marine Science and Technology, 12(5):433-441. Available on-line at http://jmst.ntou.edu.tw/marine/12-5/433-441.pdf

Jiang, Z.; Liao, Y.; Liu, J.; Shou, L.; Chen, Q.; Yan, X.; Zhu, G.; Zeng, J. (2013) - Effects of fish farming on phytoplankton community under the thermal stress caused by a power plant in a eutrophic, semi-enclosed bay: Induce toxic dinoflagellate (Prorocentrum minimum) blooms in cold seasons. Marine Pollution Bulletin, 76(1):315-324.
DOI: 10.1016/j.marpolbul.2013.07.006

Jones, G.R.; Nash, J.D.; Doneker, R.L.; Jirka, G.H. (2007) - Buoyant
surface discharges into water bodies. I: flow classification and prediction methodology. Journal of Hydraulic Engineering, 133(9):1010–1020. DOI:10.1061/(ASCE)0733-9429

Kelso, J.R.M.; Milburn, G.S. (1979) - Entrainment and Impingement of Fish by Power Plants in the Great Lakes which use the Once-Through Cooling Process. Journal of Great Lakes Research, 5(2):182-194.
DOI: 10.1016/S0380-1330 (79)72145-9

Kim, D.G.; Cho, H.Y. (2006) - Modeling the buoyant flow of heated water discharged from surface and submerged side outfalls in shallow and deep water with a cross flow. Environmental Fluid Mechanics, 6(6):501-518. DOI: 10.1007/s10652-006-9006-3

Kirillin, G., Shatwell, T.; Kasprzak, P. (2013) - Consequences of thermal pollution from a nuclear plant on lake temperature and mixing regime. Journal of Hydrology, 496:47-56. DOI: 10.1016/j.jhydrol.2013.05.023

Klein, M.; Lichter, M. (2006) - Monitoring changes in shoreline position adjacent to the Hadera power station, Israel. Applied Geography, 26(3):210-226. DOI: 10.1016/j.apgeog.2006.01.001

Kolluru, V. S., Buchak, E. M., & Brinkmann, P. E. (2003) - Hydrodynamic
modeling of coastal LNG cooling water discharge. Journal of Energy Engineering, 129(1):16-31. DOI: 10.1061/(ASCE)0733-9402(2003)129:1(16)

Langford, T. (1990) - Heat Disposal and the Sources of Thermal
Discharges. In: T. Langford (ed.), Ecological Effects of Thermal Discharges, pp.11-20, Elsevier Applied Science Publishers Ltd., London, UK. ISBN: 9781851664511.

Lardicci, C., Rossi, F.; Maltagliati, F. (1999) - Detection of thermal
pollution: variability of benthic communities at two different spatial scales in an area influenced by a coastal power station. Marine Pollution Bulletin, 38(4):296-303. DOI: 10.1016/S0025-326X(98)00149-0

Lentz, S.J.; Largier, J. (2006) - The Influence of Wind Forcing on the Chesapeake Bay Buoyant Coastal Current. Journal of Physical Oceanography, 36(7):1305-1316. Available on-line at
http://journals.ametsoc.org/doi/abs/10.1175/JPO2909.1

Madden, N.; Lewis A.; Davis M (2013) - Thermal effluent from the power sector: an analysis of once-through cooling system impacts on surface water temperature. Environmental Research Letters, 8(3):035006. DOI:10.1088/1748-9326/8/3/035006

Martinez-Arroyo, A.; Abundes, S.; Gonzalez, M.E.; Rosas, I. (2000)
- On the influence of hot-water discharges on phytoplankton communities from a coastal zone of the Gulf of Mexico. Water, Air, and Soil pollution, 119(1):209-230. DOI: 10.1023/A:1005161309609

Martins, F.; Neves, R.; Leitão, P. (1998) – A three-dimensional hydrodynamic model with generic vertical coordinate. In: V. Babovic & L.C. Larsen (eds.), Hydroinformatics ‘98: proceedings of the third International Conference on Hydroinformatics, 98(2):1403-1410, Leiden, The Netherlands. ISBN: 9789054109853. Available on-line at
http://sapientia.ualg.pt/bitstream/10400.1/124/1/MARThr.pdf

Martins, F.; Neves, R.; Leitão, P.; Silva, A. (2001) - 3D modelling in the Sado estuary using a new generic coordinate approach. Oceanologica Acta 24:51–62. DOI:10.1016/S0399-1784(01)00092-5

Martinsen, E.A.; Engedahl, H. (1987) - Implementation and testing of a lateral boundary scheme as an open boundary condition in a
barotropic ocean model. Coastal engineering, 11(5):603-627.
DOI: 10.1016/0378-3839(87)90028-7.

Mateus, M.; Neves, R. (2008). Evaluating light and nutrient limitation in the Tagus estuary using a process-oriented ecological model. Journal of Marine Engineering & Technology, 7(2):43-54.
DOI: 10.1080/20464177.2008.11020213

Mateus, M.; Riflet, G.; Chambel, P.; Fernandes, L.; Fernandes, R.; Juliano, M.; Neves, R. (2012) - An operational model for the West Iberian coast: products and services. Ocean Science, 8(4):713-732.
DOI: 10.5194/os-8-713-2012.

Miranda, R.; Braunschweig, F.; Leitão, P.; Neves, R.; Martins, F.; Santos, A. (2000) – MOHID 2000, a coastal integrated object oriented model. In: Blain, W. R. & Brebbia, C. A.(eds.) Hydraulic Engineering Software VIII, pp.393-401, WIT Press Southampton, UK. Available on-line at
http://w3.ualg.pt/~fmartins/images/hydrosoft2000_MOHID.pdf

Neves, R. (2013) - The MOHID concept. In: Mateus, M. & Neves, R. (Eds.) Ocean modelling for coastal management - Case studies with MOHID, pp.1-11, IST Press, Lisboa Portugal. ISBN: 978-9898481245. Available on-line at: http://www.mohid.com/publicdata/products/bookpapers/
2013_mohidbook_c01.pdf


Otero-Díaz, L.; Pierini, J.O.; Chambel-Leitao, P.; Malhadas, M.; Ribeiro, J.; Chambel-Leitao, J.; Restrepo, J. (2014) - Threedimensional oil spill transport and dispersion at sea by an event of blowout. Dyna, 81(186):42-50. Available on-line at: http://dyna.unalmed.edu.co/es/
ediciones/186/articulos/v81n186a05/v81n186a05.pdf


Poornima, E.H., Rajadurai, M., Rao, V.N.R., Narasimhan, S.V.; Venugopalan, V.P. (2006) - Use of coastal waters as condenser coolant in electric power plants: Impact on phytoplankton and primary productivity. Journal of Thermal Biology, 31(7):556-564.
DOI: 10.1016/j.jtherbio.2006.05.009

Poornima, E.H.; Rajadurai, M.; Rao, T.S; Anupkumar, B; Rajamohan, R; Narasimhan, S.V.; Venugopalan, V.P. (2005) - Impact of thermal discharge from a tropical coastal power plant on phytoplankton. Journal of Thermal biology, 30(4):307-316. DOI: 10.1016/j.jtherbio.2005.01.004

Riflet, G., (2010) - Downscaling large-scale ocean-basin solutions in coastal tri-dimensional hydrodynamic models. 273p., PhD Thesis, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa, Portugal. Unpublished. Available on-line at http://www.mohid.com/
PublicData/products/Thesis/PhD-griflet-2010.pdf


Roberts, P.J.; Tian, X. (2004) - New experimental techniques for
validation of marine discharge models. Environmental Modelling & Software, 19(7):691-699. DOI: 10.1016/j.envsoft.2003.08.005

Santos, F.; Gómez-Gesteira, M.; deCastro, M.; Álvarez, I. (2011) - Upwelling along the western coast of the Iberian Peninsula: dependence of trends on fitting strategy. Climate Research, 48(2-3):213-218. DOI: 10.3354/cr00972

Saravanan, P., Priya, A.M., Sundarakrishnan, B., Venugopalan, V.P., Rao, T.S.; Jayachandran, S. (2008) - Effects of thermal discharge from a nuclear power plant on culturable bacteria at a tropical coastal location in India. Journal of Thermal Biology, 33(7):385-394.
DOI: 10.1016/j.jtherbio.2008.06.006

Schreiner, S.P., Krebs, T. A., Strebel, D.E.; Brindley, A. (2002) - Testing the CORMIX model using thermal plume data from four Maryland power plants. Environmental Modelling & Software, 17(3):321-331.
DOI: 10.1016/S1364-8152(01)00065-2

Shawky, Y., Nada, A.M.; Abdelhaleem, F.S. (2013) - Environmental and hydraulic design of thermal power plants outfalls “Case study: Banha Thermal Power Plant, Egypt”. Ain Shams Engineering Journal, 4(3):333-342. DOI: 10.1016/j.asej.2012.10.008

Sousa, M.C.; Vaz, N.; Alvarez, I.; Gomez-Gesteira, M.; Dias, J. M. (2014) - Influence of the Minho River plume on the Rias Baixas (NW of the Iberian Peninsula). Journal of Marine Systems, 139:248-260.
DOI: 10.1016/j.csr.2014.06.004

Stewart, R.J.; Wollheim, W.M.; Ariel, M.; Charles, J.V.; Balazs, F.; Richard, B.L.; Bernice, R. - (2013) - Horizontal cooling towers: riverine ecosystem services and the fate of thermoelectric heat in the contemporary Northeast US. Environmental Research Letters, 8(2):025010.
DOI: 10.1088/1748-9326/8/2/025010

Takesue, K.; Tsuruta, A. (1978) - The thermal effects of cooling system of a thermal power plant on photosynthesis of marine phytoplankton. Journal of the Oceanographical Society of Japan, 34(6):295-302.
DOI: 10.1007/bf02111177

Vaz N.; Dias J.M. (2014) - Residual currents and transport pathways in the Tagus estuary, Portugal: the role of freshwater discharge and wind. Journal of Coastal Research, SI70:610-615 DOI: 10.2112/Si70-103.1

Vaz, N., Dias, J.M., Leitao, P.; Martins, I. (2005) - Horizontal patterns of water temperature and salinity in an estuarine tidal channel: Ria de Aveiro. Ocean Dynamics, 55(5-6):416-429.
DOI: 10.1007/s10236-005-0015-4

Vaz, N., Dias, J.M.; Leitão, P.C. (2009a). Three-dimensional modelling of a tidal channel: the Espinheiro Channel (Portugal). Continental Shelf Research, 29(1):29-41. DOI: 10.1016/j.csr.2007.12.005

Vaz, N., Leitão, P.; Dias, J.M. (2007). Channel-ocean exchange driven by tides and river flow: Espinheiro Channel (Portugal). Journal of Coastal Research, 50(50):1000-1004.

Vaz, N.; Fernandes, L.; Leitão, P.C.; Dias, J.M.; Neves, R. (2009b) - The Tagus estuarine plume induced by wind and river runoff: Winter 2007 case study. Journal of Coastal Research, SI56:1090-1094. Available on-line at http://la.cesam.ua.pt/artigos/JDIAS/VAZ_ET_AL.pdf

Wei, X., Ni, P.; Zhan, H. (2013) - Monitoring cooling water discharge
using Lagrangian coherent structures: A case study in Daya Bay, China. Marine Pollution Bulletin, 75(1):105-113. DOI: 10.1016/j.marpolbul.2013.07.056

Wither, A., Bamber, R., Colclough, S., Dyer, K., Elliott, M., Holmes, P.; Turnpenny, A. (2012) - Setting new thermal standards for transitional and coastal (TraC) waters. Marine Pollution Bulletin, 64(8):1564-1579. DOI: 10.1016/j.marpolbul.2012.05.019

You-liang, C.H.E.N.G.; Jing, H.Q.Z.H. (2011) - Effects of Topography on Diffusion of Thermal Discharge in Power Plant. Procedia Environmental Sciences, 11B:618-623. DOI: 10.1016/j.proenv.2011.12.096

You-liang, C.H.E.N.G.; Qing-zhe, H.A.O.; Li-li, L. (2011) - The Effect of Velocity and Outlet Angle of the Thermal Discharge on Its Diffusion with Basic Flow in Power Plant. Procedia Environmental Sciences, 11B:611-617. DOI: 10.1016/j.proenv.2011.12.095

Young, J.S.; Gibson, C.I. (1973) - Effect of thermal effluent on migrating
menhaden. Marine Pollution Bulletin, 4(6):94-96.
DOI: 10.1016/0025-326X(73)90392


Web resources

CWOP (2014) - Synop Information for 08541 in Sines Montes Chaos, SE, Portugal. In: Weather Quality Reporter, Citizen Weather Observer Program (CWOP), http://weather.gladstonefamily.net/site/08541

Direcção de Produção Térmica da EDP (2012) – Declaração Ambiental
2012 – Central Termoelétricas de Sines. In: http://www.anossaenergia.edp.pt/pdf/desempenho_ambiental/
da_76_2012_cen_term.pdf


EMODnet, 2014. European Marine Observation and Data Network,
2014. EMODnet Bathymetry Portal. In:
http://portal.emodnetbathymetry.eu/download-bathymetry.

Instituto Hidrográfico, 2014a. Instituto Hidrográfico| Previsão de Marés - Portugal. Available at http://www.hidrografico.pt/previsaomares.php

Instituto Hidrográfico, 2014b. Instituto Hidrográfico | Bóias Ondógrafo. Available at http://www.hidrografico.pt/boiasondografo.php

 

em construção