Skip Navigation Links.

Search for publications:

Limit search to the fields

ECN publication
Heat generation by a wind turbine
Published by: Publication date:
ECN Wind Energy 1-1-2001
ECN report number: Document type:
ECN-RX--01-001 Conference Paper
Number of pages: Full text:
7 Download PDF  

Presented at: 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.

Back to List