In a two-stage reciprocating compressor, the suction pressure is 1.5 bar and delivery pressure is 54 bar with a perfect intercooler. If both stages follow the same polytropic process, the intermediate pressure will be equal to

Question

Question

This question was previously asked in

ISRO SDSC Technical Assistant Mechanical 8 April 2018 Official Paper

Answer 1

Concept:

For perfect intercooling in the two-stage compressor,

\({P_i} = \sqrt {{P_1}{P_2}} \)

where P_i = Intermediate Pressure, P₁ = Suction pressure, P₂ = Delivery pressure

Calculation:

Given:

P₁ = 1.5 bar, P₂ = 54 bar

So, \({P_i} = \sqrt {{1.5}\times{54}} \)

P_i = 9 bar

Hence the intermediate pressure will be 9 bar.

Download Solution PDF