Numerical investigations of turbulent natural convection heat transfer within a wind turbine nacelle operating in hot climate

M. A. Mahdi, A. Smaili, Y. Saad

Research output: Contribution to journalArticle

Abstract

The Algerian Sahara is characterized by severe climate conditions where temperature reaches high levels with large variations during day and season. Nacelles of wind turbines operating in this region are subjected to the overheating problem, in particular the electromechanical components becoming less effective as they heat up during use. In order to maintain an appropriate temperature of the air within the nacelle, an active cooling system has to be set up to reject the generated heat towards the external environment and the resulting heat transfer must be properly controlled. The present work investigates numerically the impact of turbulent natural convection heat transfer on the nacelle thermal behavior. Reynolds-Averaged Navier–Stokes and energy equations have been considered. ANSYS FLUENT code has been employed to solve the resulting mathematical model. Temperature and velocity profiles within the 2D and 3D-configurations of the nacelle have been presented and discussed. Variations of the average temperature inside the nacelle and the required cooling capacity are determined and thoroughly discussed.

Original languageEnglish (US)
Article number106143
JournalInternational Journal of Thermal Sciences
Volume147
DOIs
StatePublished - Jan 2020

Fingerprint

wind turbines
Natural convection
free convection
Wind turbines
climate
nacelles
heat transfer
Heat transfer
heat
cooling systems
temperature profiles
mathematical models
velocity distribution
cooling
Temperature
temperature
air
configurations
Cooling systems
Mathematical models

Keywords

  • Cooling system
  • Numerical simulation
  • Saharan climate
  • Turbulent natural convection
  • Wind turbine nacelle

Cite this

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title = "Numerical investigations of turbulent natural convection heat transfer within a wind turbine nacelle operating in hot climate",
abstract = "The Algerian Sahara is characterized by severe climate conditions where temperature reaches high levels with large variations during day and season. Nacelles of wind turbines operating in this region are subjected to the overheating problem, in particular the electromechanical components becoming less effective as they heat up during use. In order to maintain an appropriate temperature of the air within the nacelle, an active cooling system has to be set up to reject the generated heat towards the external environment and the resulting heat transfer must be properly controlled. The present work investigates numerically the impact of turbulent natural convection heat transfer on the nacelle thermal behavior. Reynolds-Averaged Navier–Stokes and energy equations have been considered. ANSYS FLUENT code has been employed to solve the resulting mathematical model. Temperature and velocity profiles within the 2D and 3D-configurations of the nacelle have been presented and discussed. Variations of the average temperature inside the nacelle and the required cooling capacity are determined and thoroughly discussed.",
keywords = "Cooling system, Numerical simulation, Saharan climate, Turbulent natural convection, Wind turbine nacelle",
author = "Mahdi, {M. A.} and A. Smaili and Y. Saad",
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language = "English (US)",
volume = "147",
journal = "International Journal of Thermal Sciences",
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publisher = "Elsevier Masson SAS",

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AU - Mahdi, M. A.

AU - Smaili, A.

AU - Saad, Y.

PY - 2020/1

Y1 - 2020/1

N2 - The Algerian Sahara is characterized by severe climate conditions where temperature reaches high levels with large variations during day and season. Nacelles of wind turbines operating in this region are subjected to the overheating problem, in particular the electromechanical components becoming less effective as they heat up during use. In order to maintain an appropriate temperature of the air within the nacelle, an active cooling system has to be set up to reject the generated heat towards the external environment and the resulting heat transfer must be properly controlled. The present work investigates numerically the impact of turbulent natural convection heat transfer on the nacelle thermal behavior. Reynolds-Averaged Navier–Stokes and energy equations have been considered. ANSYS FLUENT code has been employed to solve the resulting mathematical model. Temperature and velocity profiles within the 2D and 3D-configurations of the nacelle have been presented and discussed. Variations of the average temperature inside the nacelle and the required cooling capacity are determined and thoroughly discussed.

AB - The Algerian Sahara is characterized by severe climate conditions where temperature reaches high levels with large variations during day and season. Nacelles of wind turbines operating in this region are subjected to the overheating problem, in particular the electromechanical components becoming less effective as they heat up during use. In order to maintain an appropriate temperature of the air within the nacelle, an active cooling system has to be set up to reject the generated heat towards the external environment and the resulting heat transfer must be properly controlled. The present work investigates numerically the impact of turbulent natural convection heat transfer on the nacelle thermal behavior. Reynolds-Averaged Navier–Stokes and energy equations have been considered. ANSYS FLUENT code has been employed to solve the resulting mathematical model. Temperature and velocity profiles within the 2D and 3D-configurations of the nacelle have been presented and discussed. Variations of the average temperature inside the nacelle and the required cooling capacity are determined and thoroughly discussed.

KW - Cooling system

KW - Numerical simulation

KW - Saharan climate

KW - Turbulent natural convection

KW - Wind turbine nacelle

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