Problem

You have two choices for an air compressor that will produce 2 kg/s of compressed air at 7...

You have two choices for an air compressor that will produce 2 kg/s of compressed air at 750 kPa, and you wish to evaluate which is the better choice thermodynamically (i.e., which has the lowest entropy generation rate). In both cases, the air to be compressed originally is at 20°C and 100 kPa. The two options are as follows.

Option A: An uninsulated compressor that has a surface temperature of 30°C and exhausts the air at 270°C, using 530 kW of power.

Option B: An insulated compressor that exhausts the air at 320°C

By calculating the entropy generation for each compressor, determine which option has a lower degree of irreversibility.

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