WIND ENERGY REE $6172$

ASSIGNMENT $1$

Question $1$

Derive the expression of power developed due to wind

Question $2$

Discuss the advantages and disadvantages of wind energy conversion system

Question $3$

Wind at standard atmospheric pressure and $20C$ temperature has a velocity of $15\frac{m}{s}.$ The turbine has a diameter at $90$ m and its operating speed is $40$ r $.$ m at maximum efficiency. Calculate:

i$)$ The total power density in the wind;

ii$)$ The maximum obtained power density assuming $=40\%$;

iii$)$ The total power produced $($in kW$)$; and

iv$)$ The torque and axial thrust.

Note R $=$ Gas constant $=0\mathrm{.}287k\frac{J}{k}g$ and $1$atm$=1\mathrm{.}01325{10}^5$