Question 2 of 8
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Current Attempt in Progress
As shown in the figure, air with a volumetric flow rate of 16,000 ft³/min enters an air-handling unit at 80°F, 1 atm. The air-handling unit
delivers air at 45°F, 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 13 ft/s. Assume steady state operation and ideal gas behavior for the air.
4D-50 in.
T2 T3 T45°F
Dâ‚‚=D3=26 in.
V2=V3
Duct
system
Air-handling unit
1+==P4 =1 atm
= 80°F
(AV)1
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, and
the velocity in the 50-in. duct, in ft/s.