In a carbon dioxide liquefaction facility to liquefy XXXXXXXXXXkg/day, it is condensed at –20°C and stored in a bullet. Before liquefaction, gas is compressed from atmospheric pressure and 35°C to 20...

In a carbon dioxide liquefaction facility to liquefy 25 000 kg/day, it is condensed at

–20°C and stored in a bullet. Before liquefaction, gas is compressed from atmospheric pressure and 35°C to 20 bar a, dried and sent to a chiller. Reciprocating compressors are selected for the duty. One engineer decides to use a two stage compressor while another decides to use a three stage compressor. Considering 75% overall mechanical efficiency of either compressor and equal compression ratio in each stage, calculate the power requirement in each case. Also calculate temperature of the gas at the discharge of each stage. Data: Specific heat ratio, k for
 = 1.3