Page 284 - Chemical process engineering design and economics

Compressors, Pumps, and Turbines 263

r| c compressor efficiency
T)F fan efficiency
gear efficiency
r) G
hydraulic efficiency
T| H
T|M mechanical efficiency
polytropic efficiency
T| P
T| S seal efficiency
% steam turbine efficiency

fi viscosity
p density

a) rotational speed

Subscripts
C compressor or critical conditions
L liquid phase
R reduced state
s constant entropy

V vapor phase
z elevation or compressibility factor

REFERENCES

1. Pollak, R., Selecting Fans & Blowers, Chem. Eng., 80, 2, 86, 1973.
2. Kusay,R.G.P., Vacuum Equipment for Chemical Processes, Brit.
Chem.Eng, 16,1,29, 1971.
3. Ryans, J.L., Croll, S., Selecting Vacuum Systems, Chem. Eng., 88, 25,
72,1981.
4. Patton, P.W., Joyce, C. F., Lowest Cost Vacuum System, Chem. Eng.,
83, 3, 84, 1976.
5. Dobrowolski, Z., High Vacuum Pumps, Chem. Eng., 63, 9, 181, 1956.
6. Neerken, R.F., Compressor Selection for the Chemical Process Indus-
tries, Chem. Eng., 82, 2, 78, 1975.

Copyright © 2003 by Taylor & Francis Group LLC