Question

(analytical problem solving] A Wind Generator with the following data is installed at a wind site. Upward wind velocity: 30 m/s Downward wind velocity: 10 m/s Length of blade: 20 meters Efficiency of Generator: 90% Evaluate: The Input Power to Wind Turbine E 3 The Output Power of Wind Turbine The Output of Generator For what combination of wind velocities the rotor coefficient Cp will [1] [1] become Maximum? [1] e. What is change in the wind turbine output, if we increase length of blade to 25meters? List and draw the types of wind turbines. Explain the main function of yaw drive in a WECS.

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Answer 1

Given a - - upward wind selecby . 30 mis. Downward wind Welocity to mis Length of blade = 20 meters 2e effieley of genrator - 90% - Assume blade efficieng go% Ser? o Input power of wind turbine : - The area given by f - AL Hra Aed X120) LAL 1256.63 m² The input power of wind turbine p2o.SXSXAxV² - para O.SXC123.5X61 256.030413033 P 20.86 Mbed | © output power of cained beebine's 0.40x 20.86 Me n etelg.84 mld. - The output of genrador - contor- ¿x Pout 09X 8.34 a 7.50 my
ii
04 to what are - Coellº Cp combination of wird velocity will become maximum the notur robor weern is furobiso of wird speed that the dubioe peste care The thenatical maramum power efficiency of any design of wind turbine. s.59% ------- CPmaxe 0:59 charge in tu, bice output, if I 5m extra is Joput power of wird aurbine 6361,72m2 Pioput - O.SXSAV I OSX lile X.63611072x30,3 _ tos. 63. mlad Poute 0.48 Pinplet 04% 10g. 63. 92.25 ml Hence charge in wind turbine output= 42.25-8.34 33.91 My

DATE Types of wind turbine s Horizontal axis wird durbine 2 vertical axis wind turbine 3) Darrieus wind turbine 4 Geicomill st Savonius wind turbine & Parallel Function of yow drive: . - To ensure the wind turbine is produding the mor. amount of electric energy at all times. the yew drive is used to keep the wtor facing into the wind as wird direction charges.
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