Ammonia undergoes a cycle consisting of the following three slow processes, with no significant changes in kinetic or potential energy.
Process 1 -2: Constant volume from p = 1 () bar and x1 0.6 to saturated vapour
Process 2-3: Constant temperature to = p, and Q, = +228 kJ/kg of ammonia
Process 3-1: Constant pressure
Determine the heat transfer for each process and the net work for the cycle, all in kJ/kg of refrigerant. Sketch the cycle on a T-V and a p-v diagram.