A refrigeration system with a flash chamber operates with R134a between the pressure limits of 1.0...

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Mechanical Engineering

A refrigeration system with a flash chamber operates with R134abetween the pressure limits of 1.0 and 0.1 MPa. The refrigerantleaves the condenser as saturated liquid and is throttled to aflash chamber operating at 0.4 MPa. The refrigerant leaving thelow-pressure compressor at 0.4 MPa is also routed to the flashchamber. The vapor in the flash chamber is then compressed to thecondenser pressure by the high-pressure compressor, and the liquidis throttled to the evaporator pressure. Assume the refrigerantleaves the evaporator as saturated vapor and compressors areisentropic. (The pressures are absolute pressures)
Draw P-h diagram for the refrigeration cycle on the attachedP-h diagram.
The fraction of the refrigerant vapor enters the flash chamberafter the first throttle valve.
The enthalpy of the refrigerant vapor at the flash chamber(where the two streams of vapor meet).
The amount of heat removed from the refrigerated space for amass of 0.5 kg/s through condenser.
The power input to the compressors.
The coefficient of performance for the refrigerationsystem.

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4.1 Ratings (764 Votes)

A Refrigeration system with a flash chamber diagram has shownbelow Specific heat capacity ratio for R134a refrigerant Now for Highpressure compressorPoint 4 See Answer

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