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For each case, determine the specified property value and locate the state by hand on sketches of the p-y and T-y diagrams.
(a) For Refrigerant 134a at T 5 160°F, h 5 127.7 Btu/lb. Find y, in ft3/lb.
(b) For Refrigerant 134a at T 5 90°F, u 5 72.71 Btu/lb. Find h, in Btu/lb.
(c) For ammonia at T 5 160°F, p 5 60 lbf/in.2 Find u, in Btu/lb.
(d) For ammonia at T 5 0°F, p 5 35 lbf/in.2 Find u, in Btu/lb.
(e) For Refrigerant 22 at p 5 350 lbf/in.2, T 5 350°F. Find u, in Btu/lb.
The state of 1 lbm of steam is changed from saturated vapor at 20 psia to superheated vapor at 50 psia and 1000 F. What are the enthalpy and entropy changes of the steam? What would the enthalpy and entropy changes be if steam were an ideal gas?
the edges of a thin plate are held at the temperature described below. determine the steady-state temperature
Determine the equilibrium temperature of a flat piece of the coated aluminum that is exposed to solar irradiation, GS = 1368 W/m2 on its upper surface. The opposite surface is insulated.
consider a counter-flow heat exchanger in a refrigeration system. saturated liquid-vapor mixture of r-22 enters the
given temperature of the hot loop tin36.70c tout73.738c hot flow 2.985 galmin temperatures of the cold loop tin 14.42c
a thin-walled circular tube must support a torque of 6 kn.m and a pure bending moment of 4.4 kn.m. if the wall
A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 350oC and velocity of 15 m/s. The exit is at 100 kPa, x = 1 and very low velocity. Find the specific work and the power produced.
three kg of gas in a piston cylinder assembly undergo a process during which the relationship between pressure and
a well-insulated vertical piston-cylinder device contains air. the diameter of the piston is 8 inches. atmospheric
0.5 kg of air, contained inside a piston-cylinder device, with an initial pressure of 6 bar and initial volume of 0.15 m3 undergoes a thermodynamic cycle consisting three processes as follows:
Determine the steady-state ball and oil temperatures, and the time needed for the balls to reach a temperature of Th, f 500 K.
suppose that two plates thickness t0.027 m and area a1.2 m2 for each plate are mated together. the thermal conductivity
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