Question

5 kg/s through an insulated circular duct such that the (gauge) pressure immediately downstream of a blower is 10 kPa. You may neglect the impact of elevation change in your analysis. Air flows at 0 Part A If the pressure at a downstream location within the duct is measured as 8 kPa, estimate the change in the temperature of the air that would be expected between upstream and downstream locations three significant figures. Express your answer VAE uT vec AT = C Submit Request Answer Part B If a blower was used to raise the pressure in the duct described in Part A by 2 kPa at a single location, estimate the power required to drive the blower if it has an efficiency of 94 %. Express your answer o three significant figures and include appropriate units. A Value Units W Problem 4.80 Part A If the pressure at a downstream location within the duct is measured as 8 kPa, estimate the change in the temperature of the air that would be expected between upstream and downstream locati Express your answer to three significant figures. ΥΠ ΑΣφ vec AT= Request Answer Submit Part B If a blower was used to raise the pressure in the duct described in Part A by 2 kPa at a single location, estimate the power required to drive the blower if it has an efficiency of 94%. Express your answer to three significant figures and include appropriate units. ? μΑ W Value Units Request Answer Submit

Answer 1

given dt m0.05k Sol. At P- lokfa, densy (S 0.124 6 o,o99L9m Pa- вкРа Standord dafor Cp z .00S Using Enesgy method Enesgy oss SI mcpaT PL Y AT S2 SL Lp 8x 103 FOXI0O I00S O.1246 O.0391 6.4674c OT AP Paves Roqured LJ C.o5) 853.795 W X 200D О . 1246х0.94 P 53.795 W