Page 194 - Centrifugal Pumps Design and Application

Pipeline, Waterflood and COa Pumps 169

pump selection can be based on thermodynamic tables. For a constant
throughput in units of standard cubic feet per day (SCFD), the inlet and
outlet pump capacity in GPM will change with change in specific volume
(Figure 10-36).

Calculation Procedure

The following example assumes the use of appropriate Thermody-
namie Tables.
Given

Step L Find Inlet Conditions

A. From P t, and Tj, find HI, V }, and Si from tables

B. Calculate 7,, SG b Q,, and H

C. Select Pump
Select pump for 5220 GPM and total pump head of 693 ft
Note, pump efficiency in this example is 85%.

D. Calculate BHP