In an air compressor, air flows steadily at the rate of 15kg/min. The air enters the compressor at 5m/s with a pressure of 1bar and a specific volume of 0.5m³/kg. It leaves the compressor at 7.5m/s with a pressure of 7bar and a specific volume of 0.15m³/kg. The internal energy of the air leaving the compressor is 165kJ/kg greater than that of the air entering. The cooling water in the compressor jackets absorbs heat from the air at rate of 125kJ/s. Determine: 1. Power required to drive the compressor 2. Ratio of inlet pipe diameter to outlet pipe diameter.

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