DieselShip's Online Content Library

Q7. A reciprocating compressor is to be used to compress CO₂ which enters at a temperature of 20°C and a pressure of 15.0 bar. The delivery temperature is not to exceed 100°C. The index of compression is 1.2. Calculate EACH of the following:

(a) The specific gas constant R for CO₂

(b) The maximum pressure which can be obtained in a single stage

(c) The volumetric efficiency of the single stage machine if the clearance volume is 5% of the swept volume

(d) The maximum pressure which can be obtained using two stages with perfect intercooling

(e) The isothermal efficiency of the two-stage compressor.

Note: Atomic mass relationships: O = 16; C = 12

The universal gas constant is 8.314 kJ/kmol K