TITLE:
Exergy Analysis of Single Array Wind Farm Using Wake Effects
AUTHORS:
A. Jeya Saravanan, C. P. Karthikeyan, Anand A. Samuel
KEYWORDS:
Wake Effect, Energy Efficiency, Exergy Efficiency, Wind Farms and Wind Turbines
JOURNAL NAME:
Engineering,
Vol.3 No.9,
September
23,
2011
ABSTRACT: The influence of wake parameters on the exergy analysis of single array wind farm is studied in this paper. Key parameters which influence wake effects in a wind farm are wind velocity, tip speed ratio, number of blades, rotor speed, rotor diameter and hub height. Three different models namely power, wake and exergy model were used in estimating the exergy efficiency of the single array wind farm. Even though it is ideal for wind farms to fix the wind turbines in rows and columns the conditions of the site may not always be condu- cive for it. Hence analysis has been done keeping the wind turbines at random in a row and the effect of positioning on the performance is analyzed. Energy and exergy efficiency calculations were made for different cases by varying the positions of wind turbines in the single array wind farm. Standard relations were used in estimating the energy deficit in the wind farm due to wake effects. The wake effects were found to have an aggregated influence on the energy production of the wind farm, which results from the changes in the key parameters mentioned above. Potential areas for reducing energy losses by proper location and selection of turbines based on rating are highlighted. The influence of individual parameters contributing to the wake ef-fect were analyzed and discussed in detail.