a) Air at 70(oF) and 1(atm) is cooled at the rate of 100,000(fit)3 (hr)-3 to 20(oF) by

Question:

a) Air at 70(oF) and 1(atm) is cooled at the rate of 100,000(fit)3 (hr)-3 to 20(oF) by refrigeration. For a surroundings temperature of 70 (oF), what is the minimum power requirement in (hp)?
(b) Air at 25oC and 1 (atm) is cooled at the rate of 3,000 m3 hr-1 to - 8oC by refrigeration. For a surroundings temperature of 25oC. what is the minimum power requirement in kW?