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Hot, moist outside air passes over a cooling coil, from which it exits in a saturated state at p=14.7lbf/in^2 and T=65F. The air is then mixed adiabatically with room air at p=14.7lbf/in^2, T=75F, phi=25%. The mixing process occurs at constant pressure. The dry air mass flow rate leaving the cooling coil is 250lbm/h, and the dry air mass flow rate entering the mixing chamber from the room is 750 lbm/h. Using the psychometric chart, determines the following:
i) the humidity ratio leaving the cooling coil
ii) the humidity ratio leaving the room
iii) the humidity ratio leaving the mixing chamber
iv) the final mixed air temperature (F)
v) the final mixed air relative humidity
Prove that if k varies linearly with T in a slab, and if heat transfer is one-dimensional and steady, then q may be evaluated precisely using k evaluated at the mean temperature in the slab.
Refrigerant 22 enters the valve of a refrigeration system with a pressure of 14 bars and a temperature of 32 C and exits at a pressure of 4 bars. Neglecting heat transfer and any changes in potential and kinetic energy, determine the quality of the r..
The flexural strength of a composite material reinforced with glass fiber is 54,000 psi and the flexural modulus is 15x10^6 psi. A sample, which is 1.5 in wide, 1 in high and 10 in long is supported between two rod 7 in apart.
a piece of 0.1 c steel is to be carburized at 930c until the carbon content is raised to 0.45 c at a depth of 0.020 in.
to improve the efficiency of a steam boiler system which generates 1000 psia steam for refinery process use the boiler
a liquid at 10 c kinematic viscosity of 1.30710-6 m2s is to flow from a roof-top reservoir to a tanker truck through a
A pneumatic displacement gage has d1=0.762 mm and d2=1.575 mm. The supply pressure is 68919.7 Pa with a random fluctuation of ±483 Pa, and the differential pressure Pd-Pa is measured with a water manometer that may be read with an uncertainty of 12.4..
saturated steam with 120.8 kpa is used to concentrate 1000 kgh of juice from 12 to 20 solids at 95degc steam and juice
A voltage signal is produced by a transducer. The signal contains its strongest frequency component at 50 Hz (amplitude = 5.0 V), plus a weaker component at the second harmonic (100 Hz) with amplitude 2.0 V. In addition, there is noise at 60 Hz with..
1045 steel is carburized at 650 degree c for 500 hr. the carbon concentration is 0.6 wt at a position of 3.7 mm beneath
stainless stell ball bearings desity 8085 kgm3 and cp 0.480 kjkgc having a diameter of 1.2 cm are to be quenched in
a pelton wheel is used to produce hydroelectric power. the average radius of the wheel is 1.83 m and the jet velocity
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