Chemistry

Chemistry, 30.07.2019 05:30, sassyparker1216

Why are two changes of state of the refrigerant necessary to operate a refrigerator?

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Physics, 10.07.2019 22:20, enrique3300

Arefrigerator uses refrigerant 134a as a working fluid and operates on the vapour -compression refrigiration cycle.the evaporator is maintained at -100c and the refrigirant is a dry saturated vapour as it leaves the evaporator. the compressor has an efficiency of 80%.the conditions at the outlet of the condensor are 300c and 9 bar. 1-if the mass flow rate of the refrigerant is 0,08kg/s workout the rate of heat removal from the refrigerant space.the power input to the cpmpressor and the cop of the refrigerator.sketch all state points and the cycle on the p-h diagram for the refrigerant 2state four desurable properties of a refrigerant

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Physics, 13.07.2019 17:10, Reese1394

J8. over several cycles, a refrigerator compressor does work on the refrigerant. this work is equivalent to a constant pressure of 413 × 105 pa compressing a circular piston with a radius of 0,.019 m a distance of 25.0 m. if the change in the refrigerant's internal energy is 0 j after each cycle, how much heat will the refrigerant remove from within the refrigerator?

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Physics, 06.08.2019 16:10, aclark512

J8. over several cycles, a refrigerator compressor does work on the refrigerant. this work is equivalent to a constant pressure of 413 × 105 pa compressing a circular piston with a radius of 0,.019 m a distance of 25.0 m. if the change in the refrigerant's internal energy is 0 j after each cycle, how much heat will the refrigerant remove from within the refrigerator?

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Engineering, 20.08.2019 22:30, 11needhelp11

Arefrigerator using refrigerant-134a as the working fluid operates on the vapor compression cycle. the cycle operates between 200 kpa and 1.2 mpa. the refrigerant flows through the cycle at a rate of 0.023 kg/s. the (actual) refrigerator has a compressor with an isentropic efficiency of 87%. the refrigerant enters the compressor slightly superheated by 7.6∘∘c (hint: add this to the saturation temperature). the refrigerant leaves the condenser slightly subcooled by 1°c. a)-what is the rate of heat removal from the refrigerated space for the actual refrigerator in kw? (b)- what is the power supplied to the compressor for the actual refrigerator in kw? c)-what is the cop for the actual refrigerator?

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