Title: Influence of exogenous and endogenous factors on the exergy analysis of 3-column array wind farm

Authors: A. Jeya Saravanan; C.P. Karthikeyan; Anand A. Samuel

Addresses: Department of Electrical and Electronics Engineering, Syed Ammal Engineering College, Ramanathapuram, Tamil Nadu 623502, India ' School of Mechanical and Building Sciences, VIT University Chennai Campus, Chennai 600127, India ' School of Mechanical and Building Sciences, VIT University Chennai Campus, Chennai 600127, India

Abstract: Influence of exogenous and endogenous factors on the exergy analysis of 3 column array wind farm for two different layouts are highlighted in this paper. Nine turbines were placed in two different layouts to analyse the influence of exogenous factors such as wind velocity, wind direction, wind distribution and distance between turbines. Endogenous factors considered were diameter of rotor, hub height and number of blades. Models developed for energy and exergy efficiency estimation were tested using two different site data. Energy and exergy efficiency were found to be very sensitive to mean velocity and Weibull scale factor, which are site specific. Design wind speed, free stream wind speed and position of turbines in the wind farm contribute appreciably to the wind energy utilisation of the farm. A significant improvement in energy and exergy efficiency can be noticed with very small changes in wind direction for even complex positioning of turbines.

Keywords: exergy efficiency; energy efficiency; aerodynamics; 3-column array wind farms; exogenous variables; endogenous variables; wind power generation; wind energy; exergy analysis; wind velocity; wind direction; wind distribution; turbine distance; wind turbines; rotor diameter; hub height; number of blades; wind speed.

DOI: 10.1504/IJEX.2014.059514

International Journal of Exergy, 2014 Vol.14 No.1, pp.83 - 100

Received: 31 Jul 2012
Accepted: 24 Feb 2013
Published online: 07 Aug 2014 *

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