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Refrigerent 134a at a flow rate of 0.5 lb/s enters a heat exchanger in a refrigeration system operating at steady state as saturated liquid at 20 degrees Fahrenheit at a pressure of 20lbf/in^2. A separate air stream passes in counter flow to the refrigerant 134a stream, entering at 120 degrees Fahrenheit and exiting at 77 degrees Fahrenheit. The outside of the heat exchanger is well insulated. Neglecting kinetic and potential energy effects and modeling the air as an ideal gas, determine the mass flow rate of air, in lb/s.
consider the flow of air over a vertical flat plate at a low velocity u1 in ambient pressure p1. the plate surface
a slab-milling operation is being carried out on a 20-in.-long 6-in.-wide high-strength-steel block at a feed of 0.01
a four cylinder 2.4 liter engine operates on a four stroke cycle at 3200 rpm. the compression ration is 9.41 the
a robotic-wheeled vehicle that contains science instruments is used to study the geology of mars. the rover weighs 408
a pump steadily delivers 15.2 kgs of water at the conditions given below. calculate the pump power kw. there is no heat
you are watching an object that is moving in shm. when the object is displaced 0.600m to the right of its equilibrium
the wheel has a mass of 25 kg and a radius of gyration k0.15m. it is originally spinning at w140 rads. if it is placed
in each case locate the state on sketches of the t-v and p-v diagrams.a four kg of water at 100c fill a closed
a engineer designs a heat engine using flat-plate solar collectors. the collectors deliver aeat at 70 degrees c and
Dry air passes over a flat plate, at the surface of which the water vapor concentration is 0.01 kmol/m3. The plate’s length is 5m (in the direction of airflow) and its width is 1m, and the free-stream velocity of the air is 2 m/s. If both the convect..
A refrigerant is compressed in the compression cylinder of a refrigerator from p1 = 112 psi, V1 = 13.0 in3 to p2 = 424 psi, V2 = 3.0 in3. Determine a value of n such that the data are fit by an equation of the form pV n = constant. Hint: You can take..
1.determine the specific volume of superheated nitrogen gas at an absolute pressure of 678 kpa and -134degc based on a
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