2. A vapour compression refrigeration cycle uses ammonia (R717) and operatesbetween pressures of 2.680bar and 14.70bar. The refrigerant enters thecompressor at a temperature of -8°C and is compressed with an

isentropicefficiency of 85%. The refrigerant leaves the condenser as a saturated liquid. a. Sketch the cycle on a P-H and T-S diagram b. Fill in the following table and determine COP