Engineering, 17.07.2019 22:20 samsavage4073
Arefrigerator uses refrigerant-134a as the working fluid and operates on vapor- compression refrigeration cycle. the pressures of the evaporator and condenser are 0.2 mpa and 0.5 mpa, respectively. the isentropic efficiency of the compressor is 0.9. the mass flow rate of the refrigerant is 0.5 kg/s. assume that the refrigerator leaves the evaporator as saturated vapor, and leaves the condenser as saturated liquid, and disregard any heat transfer and pressure drops in the connecting lines between the components. (a) show the cycle on a t-s diagram with respect to saturation lines; and determine (b)the rate of heat removal from the refrigerated space; (c) the rate of heat rejection to the environment (d) the coefficient of performance.
Answers: 2
Engineering, 04.07.2019 18:10
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26Ā°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70Ā°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.
Answers: 1
Engineering, 04.07.2019 18:10
Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux
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Engineering, 04.07.2019 18:10
You are making beer. the first step is filling the glass carboy with the liquid wort. the internal diameter of the carboy is 15 in., and you wish to fill it up to a depth of 2 ft. if your wort is drawn from the kettle using a siphon process that flows at 3 gpm, how long will it take to fill?
Answers: 1
Engineering, 04.07.2019 18:20
Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above
Answers: 1
Arefrigerator uses refrigerant-134a as the working fluid and operates on vapor- compression refriger...
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