Study of Heat Rejection in Triple Natural Draft Dry Cooling Towers under Crosswind Using Radiator-Type Windbreakers

Abstract:

In this paper, the effect of crosswind on triple natural draft dry cooling towers is studied and analyzed. Concerning this area, many researches have concentrated on one cooling tower. This research focuses on the mutual effects of the adjacent towers' performance, and also makes a comparison between the efficiency of the three cooling towers in windy and no-wind conditions, using Computational Fluid Dynamics (CFD). In modeling the crosswind condition, at first solid windbreakers, and then radiator-type windbreakers are used for each cooling tower. Finally, the water outlet temperatures of the radiators' cooling towers are analyzed, and the total heat rejections at different conditions are compared. Numerical results show that radiator-type windbreakers can substantially improve cooling efficiency more than usual solid-types. It should be mentioned that a complete grid study is done to achieve a grid-independent solution.

• Periodical: Applied Mechanics and Materials (Volume 598)
• Pages: 265-270
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.598.265
• Online since: July 2014
• Authors: Amir Hozhabr*, Ramin Radi, Hossein Chenari, Arash Chogani, Masoud Esmaeelipour
• Keywords: Cooling Efficiency, Crosswind, Radiator-Type Windbreakers, Triple Natural Draft Dry Cooling Towers

References

[1] Qing-ding Wei, Bo-yin Zhang, Ke-qi Liu, Xiang-dong Du, Xian-zhong Meng: A study of the unfavorable effects of wind on the cooling efficiency of dry cooling towers, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 54/55 (1995) 633-643.

DOI: 10.1016/0167-6105(94)00078-r

[2] M. Goodarzi: A proposed stack configuration for dry cooling tower to improve cooling efficiency under crosswind, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 98 (2010) 585-863.

DOI: 10.1016/j.jweia.2010.08.004

[3] A. F. Du Preez & D. G. Kroger: Effect of wind on performance of a dry-cooling tower, Heat Recovery Systems & CHP, Vol. 13, No. 2 (1993) pp.139-146.

DOI: 10.1016/0890-4332(93)90033-r

[4] M.D. Su, G.F. Tang, S. Fu: Numerical simulation of fluid flow and thermal performance of a dry-cooling tower under cross wind condition, Journal of Wind Engineering and Industrial Aerodynamics, Vol. 79 (1999) 289-306.

DOI: 10.1016/s0167-6105(98)00121-4

[5] Mohsen Goodarzi & Hossein Amooie: A proposed heterogeneous distribution of water for natural draft dry cooling tower to improve cooling efficiency under crosswind, 4th Conference on Thermal Power Plants, Tehran, Iran, IEEE (2012).

[6] Hossein Ahmadikia, Mohsen Soleimani, Ehsan Gholami: Simultaneous effects of water spray and crosswind on performance of natural draft dry cooling tower, Thermal Science, Vol. 17, No. 2 (2013) pp.443-455.

DOI: 10.2298/tsci110510134a

[7] M. Goodarzi & R. Keimanesh: Heat rejection enhancement in natural draft cooling tower using radiator-type windbreakers, Energy Conversion and Management, Vol. 71 (2013) 120-125.

DOI: 10.1016/j.enconman.2013.03.031

[8] ANSYS FLUENT 14. 0, User's Guide, ANSYS, Inc. Southpointe 275 Technology Drive Canonsburg, PA 15317 (2011).

DOI: 10.1016/b978-0-12-811768-2.00022-5

[9] Amir Hozhabr, A. R. Tahavvor, S. Samimi: Numerical simulation of flow field between gas turbine blades, GE F9 model, 4th Conference on Thermal Power Plants, Tehran, Iran, IEEE (2012).

[10] Gebhart B: Buoyancy-Induced Flows and Transport, Textbook ed. Hemisphere Publishing Corporation (1988).

[11] Launder BE, Spalding DB: The numerical computation of turbulent flow, Comput Meth Appl Mech Eng, Vol. 3 (1974) 269-289.

[12] EGI. The Heller System. Budapest (1984).

[13] EGI. Thermo Technical and Aerodynamic Design/Calculation/Characteristics of the Dry Cooling Plant System Heater, Budapest Institute of Engineering (1985).

[14] Azimian AA, Shams K, Khojasteh A: Simulation of wind effect on dry cooling tower, 9th ISME2005 Conference, Isfahan, Iran (2005).