Question

2. Helios Gas Corporation developed a gas compressor that compresses Helium from 120 kPa and 310 K to 700 kPa and 430 K. However, because of a flaw with the material being used for construction, the compressor loses 20 kJ/kg from its walls. With the requirement being able to use a steady state mass flowrate of 90 kg/min through the compressor, calculate the following: a. Required power input to the compressor (10 points) b. Required power input when the problem with the material is fixed and the compressor is adiabatic (10 points) You may use the following data for Helium: R-Helium = 2.0769 kJ/kg-K Cp-Helium = 5.1926 kJ/kg-K Cv-Helium = 3.1156 kJ/kg-K

          2. Helios Gas Corporation developed a gas compressor that compresses Helium from 120 kPa and
310 K to 700 kPa and 430 K. However, because of a flaw with the material being used for
construction, the compressor loses 20 kJ/kg from its walls. With the requirement being able to
use a steady state mass flowrate of 90 kg/min through the compressor, calculate the following:
a. Required power input to the compressor (10 points)
b. Required power input when the problem with the material is fixed and the compressor is
adiabatic (10 points)
You may use the following data for Helium:
R-Helium = 2.0769 kJ/kg-K
Cp-Helium = 5.1926 kJ/kg-K
Cv-Helium = 3.1156 kJ/kg-K

2. Helios Gas Corporation developed a gas compressor that compresses Helium from 120 kPa and
310 K to 700 kPa and 430 K. However, because of a flaw with the material being used for
construction, the compressor loses 20 kJ/kg from its walls. With the requirement being able to
use a steady state mass flowrate of 90 kg/min through the compressor, calculate the following:
a. Required power input to the compressor (10 points)
b. Required power input when the problem with the material is fixed and the compressor is
adiabatic (10 points)
You may use the following data for Helium:
R-Helium = 2.0769 kJ/kg-K
Cp-Helium = 5.1926 kJ/kg-K
Cv-Helium = 3.1156 kJ/kg-K

Added by Salvador C.

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