A reciprocating compressor has been selected to compress 0.085
m³/s of 25^oC methane gas from 100 to 6200
kPa. Assuming that the heat capacity remains constant at 2433
J/(kg∙K) over the temperature range of compression and that the
ratio of C_p/C_v remains
constant at 1.31. How many stages of compression should be used if
the compression ratio is smaller or equal to 5. What is the power
requirement if the compressor exhibits an efficiency of 80 percent?
What is the exit temperature of the gas at the exit from the first
stage? If the temperature of the cooling water can only increase by
15^oC, how much water is required for the intercoolers
and aftercooler to ensure that the compressed gas from each stage
after cooling is again returned to 25^oC?