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A cylinder fitted with a piston contains 10 lbm of R-134a at 100 psia and 140 degree F. The refrigerant is cooled at constant pressure until it exists as a saturated fluid with a steam quality of, x = 60%. (a) Determine the boundary work and the heat transferred to/from the refrigerant. (b) If the surroundings are at 15 psia and 75 degree F, determine the entropy generated by this process, the exergy destroyed, and the second law efficiency. Will this process actually occur?
a power station output is 500 megawatts. during a test it is found that this represents 28 of the energy put into the
a vertical pipe conveying water tapers from 50 mm in diameter at the top to 25 mm in diameter at the bottom in a length
Calculate the surface area available inside the heat exchanger.
Plot the lift and drag forces exerted on an airfoil as a function of velocity. Use velocity values going from 0 to 45 m/s on a log-linear plot (log-scale on the y axis).
Water at 200KPa with a quality of 25%has it temperature raised to 20degrees celcius in a constant pressure process. What is the new quality and volume?
locate the initial and final states on a sketch of the T-v digram. determine the mass of vapor present at the initial and final state, each in kg.
a piston-cylinder device with a set of stops initially contains 0.3 kg of air at 10 atm and 400?c. the location of the
water at the rate of 60 kghour is heated from 35oc to 70oc by an oil with specific heat of 1.9kjkgk. the fluids are
a engineer designs a heat engine using flat-plate solar collectors. the collectors deliver aeat at 70 degrees c and
calculate the work necessary to compress air in an insulated cylinder from a volume of 6 ft3 to a volume of 1.2 ft3.
one-half kg of refrigerant-22 is contained in a piston-cylinder assembly initially saturated vapor at 5bar. the
the case for global accounting standards arguments and evidencethis paper outlines the arguments for a basic set of
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