shown in the figure, air with a volumetric flow rate of 17,000 ft3/min enters an air-handling unit at 80oF, 1 atm. The air-handling unit delivers air at 45oF, 1 atm to a duct system with three branches consisting of two 26-in.-diameter ducts and one 50-in. duct. The velocity in each 26-in. duct is 19 ft/s. Assume steady state operation and ideal gas behavior for the air. Determine the mass flow rate of air entering the air-handling unit, in lb/s. The volumetric flow rate in each 26-in. duct, in ft3/min. The velocity in the 50-in. duct, in ft/s.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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As shown in the figure, air with a volumetric flow rate of 17,000 ft3/min enters an air-handling unit at 80oF, 1 atm. The air-handling unit delivers air at 45oF, 1 atm to a duct system with three branches consisting of two 26-in.-diameter ducts and one 50-in. duct. The velocity in each 26-in. duct is 19 ft/s. Assume steady state operation and ideal gas behavior for the air.

Determine the mass flow rate of air entering the air-handling unit, in lb/s.

The volumetric flow rate in each 26-in. duct, in ft3/min.

The velocity in the 50-in. duct, in ft/s.

D4 = 50 in.
4.
T2 = 13 = 1 = 45°F
D; = D, = 26 in.
V2 = V3
Duct
system
Air-handling unit
1+ Pi = P2 = P, = P4 = 1 atm
T = B0°F
(AV)1
Transcribed Image Text:D4 = 50 in. 4. T2 = 13 = 1 = 45°F D; = D, = 26 in. V2 = V3 Duct system Air-handling unit 1+ Pi = P2 = P, = P4 = 1 atm T = B0°F (AV)1
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