Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Analytical and field study of environmental parameters affecting on performance of Heller cooling towers from economical point of view

Authors
Mohammadali Ardakani 1
Foad Farhani 2
Mohsen Mazidi 3
1 Associate professor, Department of Mechanical Engineering, Iranian research organization for science and technology
2 Mechanical Engineering Department, Iranian Research Organization for Science and Technology, Tehran, Iran
3 Department of Mechanical Engineering, Iranian Research Organization for Science and Technology, Tehran, Iran
Abstract
Ambient temperature variations and cross winds are the most important environmental parameters affecting the performance of cooling towers, which can result in considerable economical losses to a power plant. In this paper, field and analytical study of these parameters and their effects on the performance of Heller cooling towers from economical point of view have been presented for a typical 240 MW power plant. Results show that at constant ambient temperature, with the increase in wind speed up to 6 m/s, the performance of the steam section of the power plant decreases by an average of 2.52%. Similarly, under still-air condition (no-wind condition), a 10 °C increase in the ambient temperature results in about 3.4% decrease in the performance of the steam section. The percentages of decrease in the performance of the steam section of the power plant are equivalent to reduction in the produced power amounting to 16.8 MW and 24 MW, respectively.
Keywords
Field study
Analytical study
Economical point of view
Thermal Performance
Heller cooling tower
[1]    Du Preez, A.F., and Kroger, D.G., “Effect of Wind on Performance of a Dry-cooling Tower”, Heat Recovery Systems and CHP Journal, Vol. 13, Issue. 2, pp. 139-146, (1993).
 
[2]    Wei, Q., “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, pp. 633-643, (1995).
 
[3]    Su, M.D., and Tang, G.F., “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. 74, pp. 289-306, (1998).
 
[4]    Kapas, N., “Behavior of Natural Draught Cooling Towers in Wind”, CMFF 30, July 8-10, Budapest, Hungary, pp. 42-49, (2003).
 
[5]    Amur, G., “Role of Plant Building in a Power Station Acting as Barrier to the Wind Affecting the Natural Draft Cooling Tower Performance”, 15th Australasian Fluid Mechanics Conference, May 21-24, Sydney, Australia, pp. 89-94, (2004).
 
[6]    Goodarzi, M., and Ramezanpour, R., “Alternative Geometry for Cylindrical Natural Draft Cooling Tower with Higher Cooling Efficiency under Crosswind Condition”, Energy Conversion and Management, Vol. 77, pp. 243-249, (2014).
 
[7]    EGI, “The Heller Systems”, Report Ref. No. 8325-LK, (1984).
 
[8]    Madadnia, M., “Effect of Wind Break Walls on Performance of a Cooling Tower Model”, Mechanical & Aerospace Engineering Journal, Vol. 3, No. 4, pp. 61-67, (2008).
 
[9]    Eldredge, T.V., “An Investigation of the Effects of Flue Gas Injection on Natural Draft Cooling Tower Performance”, Journal of Engineering for Gas Turbine and Power, Vol. 119, pp. 478-484, (1997).
Iranian Journal of Mechanical Engineering Transactions of ISME
Volume 17, Issue 2 - Serial Number 39
Fluid Mechanics and Heat Transfer
Summer 2015
Pages 68-82

  • Receive Date 22 May 2017