The figure shows data for a portion of the ducting in a ventilation system operating at steady state. The ducts are well insulated and the pressure is very nearly 1 atm throughout. The volumetric flow rate entering at state 2 is AV2 = 2400 ft³/min. Assume the ideal gas model for air with Cp = 0.24 Btu/lb•°R and ignore kinetic and potential energy effects. (AV)1 = 5000 ft /min T, = 80°F Air, Cp = 0.24 Btu/lb°R p=1 atm 3 V3 = 400 ftmin T3 = ? 2 (AV)2 T2 = 40°F -Insulation ft/min Determine the temperature of the air at the exit, in °F, and the rate of entropy production within the ducts, in Btu/min-°R.

Elements Of Electromagnetics
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The figure shows data for a portion of the ducting in a ventilation system operating at steady state. The ducts are well insulated and
the pressure is very nearly 1 atm throughout. The volumetric flow rate entering at state 2 is AV2 = 2400 ft3/min. Assume the ideal gas
model for air with Cp = 0.24 Btu/lb-°R and ignore kinetic and potential energy effects.
(AV)1 = 5000 ft³/min
Air, Cp = 0.24 Btu/lb°R
1
T, = 80°F
p=1 atm
3 V3 = 400 ft/min
T3 = ?
2
(AV)2
T2 = 40°F
Insulation
ft/min
Determine the temperature of the air at the exit, in °F, and the rate of entropy production within the ducts, in Btu/min-°R.
II
Transcribed Image Text:Question 9 of 15 < > - / 1 View Policies Current Attempt in Progress The figure shows data for a portion of the ducting in a ventilation system operating at steady state. The ducts are well insulated and the pressure is very nearly 1 atm throughout. The volumetric flow rate entering at state 2 is AV2 = 2400 ft3/min. Assume the ideal gas model for air with Cp = 0.24 Btu/lb-°R and ignore kinetic and potential energy effects. (AV)1 = 5000 ft³/min Air, Cp = 0.24 Btu/lb°R 1 T, = 80°F p=1 atm 3 V3 = 400 ft/min T3 = ? 2 (AV)2 T2 = 40°F Insulation ft/min Determine the temperature of the air at the exit, in °F, and the rate of entropy production within the ducts, in Btu/min-°R. II
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