Modeling Effects of Heated Waste Water Discharge Rate on the Thermal Plume Pattern and Temperature at the Wastewater Discharge Site

Subject Areas : Subjects

parasto akbari ¹ (دانشآموخته دکتری فیزیک دریا، گروه فیزیک دریا، دانشکده علوم دریایی و اقیانوسی، دانشگاه علوم و فنون دریایی خرمشهر)
masood sadri nasab ² (دانشیار، گروه مهندسی ساحل، دانشکده محیط زیست، دانشگاه تهران)
یدالله nikpor ³ (استادیار، گروه شیمی دریا، دانشکده علوم دریایی و اقیانوسی، دانشگاه علوم و فنون دریایی خرمشهر)
علیرضا صفاهیه ⁴ (استادیار، گروه زیست شناسی دریا، دانشکده علوم دریایی و اقیانوسی، دانشگاه علوم و فنون دریایی خرمشهر)

Received: 2015-05-25 Accepted : 2018-10-03 Published : 2018-08-23

Keywords: Keyword: Modeling, Heated Wastewater, Temperature Field, Cooling System,

Abstract :

Water application as a coolant in industry and its discharge in the water ecosystem causes
thermal pollution. This study aimed at investigating the water temperature pattern affected by
heated wastewater discharge rate changes using the three dimensional Coupled
Hydrodynamical-Ecological model for Regional and Shelf Seas (COHERENS). The model was
run for two years to reach a steady state employing a Cartesian grid (40 × 120), five sigma
levels from the surface to the bottom, meteorological data, main components of the tide (O1,
K1, M2, S2), and information related to the heated wastewater discharge rate and temperature
of water body. The modeling results showed that the wastewater discharge rate affected the
temperature at the discharge site and thermal plume expansion in the different seasons. The rate
of temperature variations that were created in the environment by the heated wastewater
depended on the temperature difference between the environment and wastewater. The results
also showed the Coriolis force had an effect on the thermal plume. Consequently, the plume
and its effects on water body had been diverted to the right. The results of this modeling can be
used to manage thermal pollution in the environment and improve the efficiency of the cooling
system used in industry.
Keyword: Modeling, Heated Wastewater, Temperature Field, Cooling System.

References:

ایزدپناهی، غ.، آیین جمشید، خ.، عوفی، ف.، اسدی
سامانی، ن.، حقشناس، الف.، محمدنژاد، ج.، امیری، س. و
پورنگ، ن.، 1386 . گزارش نهایی بررسی هیدرولوژی و
هیدروبیولوژی خلیج فارس در محدوده آبهای استان
. بوشهر. مؤسسه تحقیقات شیلات، ص. 210
2) جوکار، ک.، 1386 . مدلسازی آلودگی حرارتی نیروگاه
اتمی بوشهر، ششمین همایش ملی انرژی، تهران، کمیته
ملی انرژی جمهوری اسلامی ایران، معاونت امور برق و
http://www.civilica.com/Paper- ، انرژی وزارت نیرو
NEC06-NEC06_130.html.
3) مقیمی، پ.، کیهان، ک.، عباسپور، م .و جاوید، الف.،
1383 ). بررسی آلودگی حرارتی طرح توسعه نیروگاه
و ارزیابی MIKE بندرعباس با استفاده از مدل 21
اقتصادی و زیست محیطی طرح توسعه .ششمین همایش
بین المللی سواحل، بنادر و سازه های دریایی.
4) Brown, G. W., & Krygier, J. T. 1970. Effects
of clear‐cutting on stream temperature. Water
resources research. 6: 1133-1139.
5) Cheng, Y. L., & Ying, B. F. 2007.
Numerical simulation and comparison of water
intake-outlet methods in power plants. Journal
of Hydrodynamics, Ser. B. 19(5): 623-629.
6) Coutant, C. C. 1999. Perspectives on
temperature in the Pacific Northwest's fresh
waters (No. ORNL/TM-1999/44). Oak Ridge
National Lab., TN (US).
7) Davies, A. M., & Lawrence, J. 1994.
Examining the influence of wind and wind
wave turbulence on tidal currents, using a
three-dimensional hydrodynamic model
including wave-current interaction. Journal of
Physical Oceanography, 24(12): 2441-2460.
8) Hankin, S., & Denham, M. 2006. FERRET
User’s Guide. Version 6. NOAA/PMEL-
/TMAP, 592 pp. Available via
http://vis.lbl.gov/NERSC/Software/ferret/docs
/ferret_users_guide_v600.pdf.
9) Issakhov, A. 2015. Mathematical modeling
of the discharged heat water effect on the
aquatic environment from thermal power
plant. International Journal of Nonlinear
Sciences and Numerical Simulation.
10) Kim, H. J., & Kim, J. 2015. Numerical
Modeling Of OTEC Thermal Discharges In
Coastal Waters. International Conference of
Hydroinformatics.
11) Kinouchi, T., Yagi, H., & Miyamoto, M.
2007. Increase in stream temperature related to
anthropogenic heat input from urban
wastewater. Journal of Hydrology, 335(1), 78-
88.
12) Koh, R., Brooks, N., List, E., & Wolanski,
E. J. 1974. Hydraulic modeling of thermal
outfall diffusers for the San Onofre nuclear
power plant. WM Keck Laboratory of
Hydraulics and Water Resources, California
Institute of Technology. Pasadena, California.
Rep.No. KH-R-30.
13) Luyten, P. 2011. COHERENS — A
coupled Hydrodynamical-Ecological Model
for Regional and Shelf Seas: User
Documentation. Version 2.0.: RBINS-MUMM
Report, Royal Belgian Institute of the Natural
Sciences.
14) Maderich, V., Heling, R., Bezhenar, R.,
Brovchenko, I., Jenner, H., Koshebutskyy, V.,
& Terletska, K. 2008. Development and
application of 3D numerical model
THREETOX to the prediction of cooling water
62 شبیهسازی اثرات نرخ تخلیهی پساب گرم بر الگوی پیشروی پلوم گرمایی و دما در محل تخلیهی پساب
transport and mixing in the inland and coastal
waters. Hydrological processes, 22(7): 1000-
1013
15) Mohseni, O., & Stefan, H. 1999. Stream
temperature/air temperature relationship: A
physical interpretation. Journal of Hydrology,
218: 128-141.
16)Najafi, H. S. 1997. Modelling tides in the
Persian Gulf using dynamic nesting, PhD
thesis, University of Adelaide, Adelaide, South
Australia.
17) Oey, L. Y., & Chen, P. 1992. A nested grid
ocean model: With application to the
simulation of meanders and eddies in the
Norwegian Coastal Current. Journal of
Geophysical Research: Oceans (1978–
2012), 97(C12): 20063-20086.
18) Pedlosky, J. 1987. Geophysical Fluid
Dynamics. Springer Verlag, Berlin.
19) Sehgal, R. C., & Jaluria, Y. 1982.
Horizontal recirculation in water bodies due to
thermal discharge. Journal of Energy. 7(5):
419-428.
20) Signell, R.P., Beardsley, R.C., Graber,
H.C., and Capotondi, A. 1990. Effect of wavecurrent
interaction on wind-driven circulation
in narrow, shallow embayments. Journal of
Geophysical Research, 95: 9671-9678.
21) UNESCO, 1981. Tenth report of the joint
panel on oceanographic tables and standards.
UNESCO Technical Papers in Marine Science
No. 36, UNESCO, Paris.
22) You-liang, C., Qing-zhe, H., & 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, 11: 611-617

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