Page 404 - Reciprocating Compressors Operation Maintenance
P. 404
A P P E N D I X *
Reciprocating Compressor
Calculations
CYLINDER SIZING
Cooling jackets, lubricant, packing and ring material limit cylinder tem-
peratures. 275°F (135°C) is set as ideal maximum with 375°F (190°C) as
absolute limit of operating temperatures. Using Equation A-l with the
above limits, the design temperature ratio per cylinder can be set.
k - l
(n yir
T 2ad =T, (A-l)
Figure A-l is a plot of Equation A-l .
T 2 actual may be obtained from these values where isentropic or adia-
batic efficiencies are known from:
A HP
T
1 2
The design compression and tension load on the piston rod must not be
exceeded and, therefore, rod load must be checked on each cylinder
application. Rod load is defined as follows:
* Source: Fred K. Geitner, P. E., Sarnia, Ontario, Canada
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