ECN publicatie:
Heat generation by a wind turbine
Gepubliceerd door: Publicatie datum:
ECN Windenergie 1-1-2001
ECN publicatienummer: Publicatie type:
ECN-RX--01-001 Conferentiebijdrage
Aantal pagina's: Volledige tekst:
7 Download PDF  (142kB)

Gepresenteerd op: Annual IEA symposium on the aerodynamics of wind turbines, NREL, USA, 4-5 december 2000.

It will be shown that an actuator disk operating in wind turbine mode extracts more energy from the fluid than can be transferred into useful energy. At the Lanchester-Betz limit the decrease of the kinetic energy in the wind is converted by 2 /3 into useful power and by 1 /3 into heat. Behind the wind turbine the outer flow and the flow that has passed the actuator disk will mix. In this process momentum is conserved but part of the kinetic energy will dissipate in heat via viscous shear.

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