SOLVED: A simple low-velocity duct system (max velocity = 1000 ft/min) is shown below. Size an appropriate circular air duct system if the plenum can provide 0.2 in. wg of static pressure. A diffuser will be installed at the end of each branch that is rated for 0.05 in. wg at the exit. Use the attached chart to design the duct system.40 ft200 cfm20 ftplenum35 ft20 ft40 ft300 cfm30 ftSpecifications: The working fluid is air, there are two 90° elbows on the bottom branch and one elbow on the top
SOLVED: A simple low-velocity duct system (max velocity = 1000 ft/min…
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SOLVED:Room air is drawn into an insulated duct of constant area through a smoothly contoured converging nozzle. Room conditions are T=80^∘ F and p=14.7 psia. The duct diameter is D=1 in. The pressure at the duct inlet (nozzle outlet ) is p1=13 psia. Find (a) the mass flow rate in the duct and (b) the range of exit pressures for which the duct exit flow is choked.
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