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Aerodynamic Improvement of Cooling Systems for a Thermal Power Plant Using CFD

Salemkar, Hossein | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44315 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Darbandi, Masoud
  7. Abstract:
  8. This research considers the wind effects on the thermal deficiency of natural draught dry cooling tower (NDDCT) using the CFD tool. To have a realistic study, the NDDCT of Shazand Powerplant, located in Shazand, Iran, is simulated as the sample cooling tower design points. Considering of Shazand NDDCT model, the mal-effects of local wind were studied against its thermal efficiency. As is known, the thermal efficiency of a NDDCT can be affected by local wind in either its upper (i.e., outlet section) or lower (i.e., the radiator section) parts. In this study, a full study is performed to quantify the mal-effects of local wind on either upper or lower parts of one tower. The results show that a local wind can have different positive and negative influences on both the upper and lower parts of a NDDCT. After such quantifications, four different aerodynamic configurations are proposed at the tower outlet to improve the thermal efficiency of a NDDCT under windy conditions. These four configurations are named upper triangle, upper rook, upper nozzle-diffuser and upper louver. Each of these configurations is simulated at different wind velocities. The achieved results show that all proposed configurations will improve the thermal efficiency of NDDCT. In order to quantify the improvement, two parameters are defined as the improvement and recovery percents. This study shows that the best configuration is the upper louver among the four proposed designs. It is shown that this case performs the highest improvement magnitude at a wind velocity of 5 m/s and the highest recovery value at a wind velocity of 10 m/s
  9. Keywords:
  10. Computational Fluid Dynamics (CFD) ; Dry Cooling Tower ; Thermal Power Plants ; Wind Blowing ; Dry Cooling Tower ; Cooling Tower Aerodynamics

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