An ideal three-stage cascade system uses R134a in all three cycles with a low pressure of 100 kPa and a high pressure of 1000 kPa and with intermediate pressures of 200 kPa and 600 kPa. The mass flux in the low-pressure cycle is 0.8 kgis. Sketch the cycle on a T-s diagram and detente:
(i) The cooling load
(ii) The mass flux in each cycle
(iii) The total compressor power
(iv) The COP of this cascade system
(v) Also for a single-stage cycle between the same high and low pressures, find the compressor power and the COP for the same cooling load.