( (b) A single cylinder air compressor has a stroke of 100 mm, a bore of 80 mm and a compression ratio of 4.5. At the be

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B A Single Cylinder Air Compressor Has A Stroke Of 100 Mm A Bore Of 80 Mm And A Compression Ratio Of 4 5 At The Be 1 (78.45 KiB) Viewed 39 times

( (b) A single cylinder air compressor has a stroke of 100 mm, a bore of 80 mm and a compression ratio of 4.5. At the beginning of each compression stroke, the pressure of the air in the compressor is 98.5 kPa and the temperature is 20°C. At the end, the pressure is 8.09 bar. (i) Find the mass of air in the cylinder [4 marks] (ii) Calculate the final temperature. [4 marks] (iii) If the amount of work done on the gas is 180 ) calculate the heat lost to the surroundings (4 marks] (iv) Calculate the change in enthalpy per kg of air. [2 marks] (v) Is this an adiabatic process? [2 marks] For air Ср = 1005 J/kg K Cy = 717.8 J/kg K R = 287.1 J/kg K For Ideal Gases pV = MRT