ut Calibri (Body) -12 opy Format Painter -A A Aa A A BIUA X2 X2 A Q38 A38 AaBbCcDd AaBbCct AaBbCcD AaBbC A Placehol... IDC Bo... List Pa... IDC He... Word Typesetting Find and Select Se Replace A single cylinder reciprocating compressor has a bore of 120 mm and a stroke of 150 mm and is driven at a speed of 1000 rpm. It is compressing CO2 gas from a pressure of 140kPa and a temperature of 20C to a temperature of 250C. Assuming polytrophic compression with n=1.3. No clearance and volumetric efficiency of 100%. Calculate: a) Pressure ratio b) Indicated power c) Shaft power with a mechanical efficiency of 80% d) Mass flow rate If the second stage of equal pressure ratio were added, calculate: e) The overall pressure ratio, f) The bore of the second stage cylinder, if the same stoke was maintained. Student answer (10 marks) F38 Assessor feedback: (marks 2