1.

Calculate the air density when 18m/s wind is at 1std atmospheric pressure and 34^oC?(a) 1.149 kg/m^3(b) 1.9 kg/m^3(c) 2.88 kg/m^3(d) 5.89 kg/m^3The question was asked in an interview.Enquiry is from Velocity and Power from Wind in portion Wind Energy of Energy Engineering

Answer»

Correct answer is (a) 1.149 kg/m^3

To explain I WOULD SAY: For AIR, gas constant R = 287 J/kgK, 1ATM = 1.01325 X 10^5 Pa

Air DENSITY, ρ = P/RT = (1.01325 × 10^5)/(287(34+273.15)) = 1.149 kg/m^3.



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