the percentage saving in work input by compressing air in two stages from 1 bar
to 7 bar instead of one stage. Assume a compression index of 1.35 in both the
cases and optimum pressure and complete intercooling in a two-stage compressor.
a three-stage compressor, air 1s compressed from 98 kPa to 20 bar. Calculate
for 1 m3 of air per second, (a) Work under ideal condition for n =
1. 3, (b) Isothermal work, (c) Saving in work due to multi staging, (d)
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