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Question 11.4: A compressed air system has a mechanical power requirement o...

A compressed air system has a mechanical power requirement of 50 kW with a motor efficiency of 90 percent. Determine the cost savings of reducing the discharge absolute pressure from 800 kPa to 700 kPa. Assume that:
• The compressor is operating 4,000 hours per year with an average load factor of 70 percent.
• The cost of electricity is $0.05/kWh.

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