Fluid Mechanics The minimum fresh air requirement of a residential building is specified to be 0.35 air changes per hour

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Fluid Mechanics
The minimum fresh air requirement of a residential building is
specified to be 0.35 air changes
per hour (ASHRAE, Standard 62, 1989). That is, 35% of the entire
air contained in a residence
should be replaced by fresh outdoor air every hour. The
ventilation requirement of a 3.0 m
high, 300 m2 residence is to be met entirely by a fan. The air
velocity is not to exceed 5 m/s to
minimize vibration and noise. The combined efficiency of the
fan–motor unit to be used can
be taken to be 60%. Determine the following:
(a) Flow capacity in L/min of the fan that needs to be
installed
(b) the wattage of the fan–motor unit to be purchased and
disregard the effect of the
kinetic energy correction factors.
(c) the diameter of the fan duct required
Take the air density to be 1.25 kg/m3 and disregard the effect
of the kinetic energy correction
factors.