A Claude-type cycle is used to liquefy air originally at 1 atm and 300K.

It is expected that the system recovers 10% of the compression energy that has compressed the air up to 80 atm. Fifty percent (50%) of the initial stream is sent to the expansion machine. Assume that the heat loss of the system is 6 kcal/kg of the initial processes air and that the nonliquefied fraction exits the system 3C below the initial temperature.

Determine:

1. The liquefied fraction, 2. Efficiency of the system, 3. And compare the system to another one that compress the air up to 200 atm, assuming net losses of 6 kcal/kg and that the air exits at 297K.