Question

What is the formula for the volume of air?

(a) volume of air = 0.9 * losses in kW / difference of air temperature at inlet and outlet

(b) volume of air = 0.9 * losses in kW * difference of air temperature at inlet and outlet

(c) volume of air = 0.9 / losses in kW * difference of air temperature at inlet and outlet

(d) volume of air = 1 / 0.9 * losses in kW * difference of air temperature at inlet and outlet

The question was posed to me in quiz.

Asked question is from Design of Fan topic in chapter Aspects of Design of Mechanical Parts of Design of Electrical Machines

Answer 1

Correct choice is (a) volume of air = 0.9 * losses in kW / difference of air temperature at inlet and outlet

Easy explanation: The losses in kW is calculated along with the difference of air temperatures at inlet and outlet. On substitution the volume of air can be obtained.