Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Experimental study of effects of windbreaker walls for increasing flow rate of Heller cooling tower

Authors
Mohammadali Ardakani 1
Mohsen Mazidi 2
Foad Farhani 3
1 Associate professor, Department of Mechanical Engineering, Iranian Research Organization for Science and Technology
2 Phd Student, Department of Mechanical Engineering, Iranian Research Organization for Science and Technolgy
3 Assistant professor, Department of Mechanical Engineering, Iranian Research Organization for Science and Tehcnology
Abstract
Cross winds adversely affect the thermal performance of Heller dry cooling towers. In this experimental study, an isothermal model of Heller tower was used in wind tunnel to investigate the effect of windbreakers for increasing flow rate through the model under wind conditions. Windbreakers of various dimensions were installed at different angles around the model, and their effectiveness was studied under various wind directions. Results showed that use of windbreakers improved the flow rate by 30%. Moreover, with increase in wind velocity, effect of windbreaker length on the performance of the model was more pronounced. Results also indicated that for up to 30 degrees change in wind direction with respect to the diameter perpendicular to wind, there is no appreciable effect on the flow rate through the model.
Keywords
Experimental study
Heller cooling tower
Wind Tunnel
Windbreaker wall

Subjects

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Iranian Journal of Mechanical Engineering Transactions of ISME
Volume 17, Issue 4 - Serial Number 41
Heat Transfer and Fluid Mechanics
Winter 2016
Pages 69-84

  • Receive Date 13 April 2015
  • Revise Date 12 June 2015
  • Accept Date 13 July 2015