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Design a closed-system air-standard gas power cycle composed of three processes and having a minimum thermal efficiency of 20 percent. The processes may be isothermal, isobaric, isochoric, isentropic, polytrophic, or pressure as a linear function of volume; however, the Otto, Diesel, Ericsson, and Stirling cycles may not be used. Prepare an engineering report describing your design, showing the system, P-v and T-s diagrams, and sample calculations.
an ideal vapor compression refrigeration cycle with r-134a as the working fluid operates between the pressure limits of
a 5 kg object a and a 10 kg object b undergo an oblique central impact. the coefficient of restitution is e 0.6.
a well-insulated rigid tank of volume 10 m3 is connected by a valve to a supply line carrying air at 227oc and 10 bar.
a nozzle receives 0.1 kgs steam at 1 mpa 400oc with negligible kinetic energy. the exit is at 500 kpa 350oc and the
a bottle filled with soda rests on the conveyor of a grocery check-out. the bottle weights 2 lbs the cg is 8 inches
a flow of 4 kgs ammonia goes through a device in a polytropic process with an inlet state of 150 kpa -20degc and an
a 10 cm long circular pin kfin20 wmtimesk of 12-mm dia removes 53watts of heat from a hot base when the average
a cylindrical rod of steel e 30 x 106 psihaving a yield strength of 45000nbsppsi is to be subjected to a load of 2500
a mixture of methane and air is flammable only if the mole percent of methane is between 5 and 15. a mixture containing
current automotive air conditioners use r134a as a working fluid. assume an evaporator temperature of 0c in practice
air whose density is 0.082 lbmft3 enters the duct of an air conditioning system at a volume flow rate of 450 ft3min. if
Assuming a small oscillation about the horizontal equilibrium position, determine position X for the slider such that the friction period is 1 second.
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