Q/ Refrigeration system operates on a vapor - compression cycle with R-134a as the working fluid. The refrigerant enter the compressor as superheated vapor at 0.1 Mpa and is compressed to 1 Mpa .The superheat and subcooling are 10 C°. Mass flow rate of refrigerant is 0.05 kg/s. Determine :- x4, Qe, Qc, Wc & C.O.P.

When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be higher in temperature than the entering air temperature.

Condensers in these refrigerators are all_______cooled.

A typical temperature relationship between a high-efficiency condenser and the ambient temperature is A. 10F. B. 20F. C. 30F. D. 40F.

b. A refrigerating system using Freon-12 has an evaporator saturation temperature of - 25°C and a condenser saturation temperature of 35°C. The vapor is dry saturated at entry to the compressor and has a temperature of 65°C after compression to the condenser pressure. There is no undercooling of the liquid in the condenser. i. Calculate the input power required by the compressor per kW of refrigeration. ii. Calculate the COPRef of the refrigerating system. ii. Show the operating cycle of the refrigerating system on a T-s diagram.

i need the answer quickly

Solve using P-h chart with a clear handwriting

A simple saturated refrigerating cycle for R-12 system operates at an evaporating temperature of -5 ⁰C and a condensing temperature of 40⁰C. Show the effects of superheating the suction vapor from -5⁰C to 15⁰C.

Cold storage uses R134a, the evaporator temperature is -7C and the condenser temperature is 32C. The cooling load is 5.3103 kJ/min. The cycle is ideal. Determine: 1. Mass flowrate of the refrigerant. 2. Coefficient of Performance (COP). - If the water condenser is used that enter at 24C and exit at 30C. determine the water flowrate.

Q2/ A vapor-compression refrigeration system operates on the cycle. The refrigerant is tetrafluoroethane. For Evaporation T = 0°C; condensation T = 26°C; n(compressor) = 0.79; refrigeration rate = 600 kJ-s—1., determine the circulation rate of the refrigerant, the heat-transfer rate in the condenser, the power requirement, the coefficient of performance of the cycle