Question: Solve this problem in details and calculation: Ext-1.8 (25 points) A system consists of 2kg of Air initially at state 1 , where p1=1 bar,

Solve this problem in details and calculation:

Solve this problem in details and calculation: Ext-1.8 (25 points) A system

Ext-1.8 (25 points) A system consists of 2kg of Air initially at state 1 , where p1=1 bar, T1=300K. The system undergoes a power cycle consisting of the following processes: Process 1-2: Constant volume to p2,p2>p1 Process 2-3: Polytropic expansion with pv1.4= constant Process 3-1: Constant-pressure compression Assuming the ideal gas model and neglecting kinetic and potential energy effects, (a) sketch the cycle on a p-v diagram. (b) Present a computer generated plot show the thermal efficiency versus p2/p1 ranging from 1.1 to 4

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