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A building has a 10000 ft.sq interior office space, served by one AHU with economizer function. The supply air flow is 10000 CFM and minimum outside air flow is 1000 CFM. The desired space condition is 75F and 50%rh and the supply ir temperature is 55F. The air temperature rise is neglected through the fan. Determine outside air flow under the following outside air condition to minimize the cooling coil energy consumption. a. 100F and 68F wb.where the supply air temperature and relative humidity equal 55F and 90% respectively.
Helium enters subsonically and flows isentropically through the converging-diverging duct. Compare the values of Ma, T/T0, and P/P0 for helium with those for air at several locations in the duct. Use 0.163 ≤ Ma ≤ 3.221.
two meshing helical gears have a 25 degree transverse pressure angle and a 20 degree normal pressure angle. the gears
two structural members b and c are bolted to the bracket a. knowing that the tension in member b is 6kn and that the
How many engagement points on the flywheel would be necessary to make this machine safe? Show your work.
a work piece 400 mm x 70 mm in diameter is to be machined. the material has constants n0.23and c250 mmin. disposable
the sphere of mass m1 travels with an initial velocity v1 directed as shown and strikes the sphere of mass m2. for a
two particles a and b are travelling around a circle of redius 2m in opposite directions. the velocity of particle a
consider x norm57 y norm57 and z norm19 and assume xy and z are independent.1 find and sketch the probability
an internal combustion engine with clearance volume of 60 cm3 and compression ratio of 8.5 is modeled using the
water in a pipeline flows with a velocity of 8fts. the pipeline supplies a tank with a level 30 ft above the pipe
two reversible refrigeration cycles operate in series. the first cycle receives energy by heat transfer from a cold
a projectile is launched from point a with initial speed v0 and makes an angle ?n with the horizontal. it hits the
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