A two-stage, double-acting compressor is to deliver 90 lb/min of air from 14.3 psia and 90 ̊F to a final pressure of 185 psia. The normal barometer is 29.8 in. Hg and the temperature is 80 ̊F. The pressure drop in the intercooler is 3 psi and the temperature of the air at the exit of the intercooler is 90 ̊F, the speed is 210 rpmand pV1.34 =C during compression and expansion. The clearance is 5% for both cylinder. The temperature of the cooling water increase by 18 ̊F. Find: a) The volume of free air b) The discharge pressure of the low pressure cylinder for minimum work, c) The temperature at discharge from both low pressure and high pressure cylinders
Provide a complete given and computation. Include all the decimals.
A two-stage, double-acting compressor is to deliver 90 lb/min of air from 14.3 psia and 90 ̊F to a final pressure of 185 psia. The normal barometer is 29.8 in. Hg and the temperature is 80 ̊F. The pressure drop in the intercooler is 3 psi and the temperature of the air at the exit of the intercooler is 90 ̊F, the speed is 210 rpmand pV1.34 =C during compression and expansion. The clearance is 5% for both cylinder. The temperature of the cooling water increase by 18 ̊F. Find:
a) The volume of free air
b) The discharge pressure of the low pressure cylinder for minimum work,
c) The temperature at discharge from both low pressure and high pressure cylinders
d) The mass of cooling water to be circulated about each cylinder and through the intercooler
e) The work
f) If, for the low pressure cylinder, L/D = 0.68 and if both cylinders have the same stroke, what should be the cylinder dimensions?
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