Engineering, 18.07.2019 20:30 eks8252
Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.128 kg/s, and it leaves at 0.7 mpa and 50°c. the refrigerant is cooled in the condenser to 24°c and 0.65 mpa, and it is throttled to 0.15 mpa. disregarding any heat transfer and pressure drops in the connecting lines between the components determine (a) the rate of heat removal from the refrigerated space and the power input to the compressor kw (round to one decimal place) kw (round to two decimal places) in (b) the isentropic efficiency of the compressor, % (round to one decimal place) and (c) the cop of the refrigerator cop round to two decimal places)
Answers: 1
Engineering, 03.07.2019 14:10
The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite
Answers: 3
Engineering, 03.07.2019 15:10
Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?
Answers: 3
Engineering, 04.07.2019 18:10
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°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
Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.
Answers: 1
Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c...
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