Engineering, 28.10.2019 23:31 macorov37
Refrigerant-134a enters the compressor of a refrigeration system as saturated vapor at 0.14 mpa and leaves as superheated vapor at 0.8 mpa and 60°c at a rate of 0.064 kg/s. determine the rates of energy transfers by mass into and out of the compressor. assume the kinetic and potential energies to be negligible. the enthalpies of refrigerant-134a at the inlet and the exit are 239.19 kj/kg and 296.82 kj/kg, respectively
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
Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.
Answers: 2
Engineering, 04.07.2019 18:10
Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?
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Engineering, 04.07.2019 18:20
Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.
Answers: 3
Refrigerant-134a enters the compressor of a refrigeration system as saturated vapor at 0.14 mpa and...
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