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IN THIS VIDEO I SHOW YOU HOW TO SOLVE A REFRIGERATION CYCLE EXERCISE IN THERMODYNAMICS, USING THE INITIAL VALUE OF ENTROPY AND PRESSURE GIVEN. IT IS A SOLVED EXERCISE FROM THE REFRIGERATION CHAPTER OF MORAN SHAPIRO'S BOOK. An ideal vapor compression cycle of R134a refrigerant with a mass flow rate of 0.08 kg/s communicates thermally with a cold region and a hot region where: Saturated vapor of R134a enters the compressor, with entropy equal to 0.9313 kJ/kgK, where after an isentropic process, the pressure at the outlet is 700 kPa; Saturated liquid leaves the condenser at a temperature of 25°C to enter the expansion valve; Construct a Txs diagram for the cycle and determine: (a) the temperature at the compressor inlet; (b) the compressor power; (c) the refrigeration capacity in TR; (d) the cycle coefficient of performance;