Compressors, Gas Turbines and Jet Engines
Inter-cooling in multistage compressors is done

To cool the air during compression
To minimize the work of compression
To cool the air at delivery
To enable compression in two stages

ANSWER DOWNLOAD EXAMIANS APP

Compressors, Gas Turbines and Jet Engines
For a two stage reciprocating compressor, compression from p₁ to p₃ is with perfect intercooling and no pressure losses. If compression in both the cylinders follows the same polytropic process and the atmospheric pressure is pa, then the intermediate pressure p₂ is given by

P₂ = Pa × p₃/p₁
p₂ = p₁. p₃
p₂ = (p₁ + p₃)/2
p₂ = Pa p₃/p₁

ANSWER DOWNLOAD EXAMIANS APP