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perform one, two, or three phase calculations. If there are multiple runs of pipe of
different diameters or elevations, the Pipeline block should be used. Figure 8.4 shows
the Pipe input options. An example of usage is given at Examples/pipeline.
8.5 WORKSHOPS
Workshop 8.1
The stream whose composition is given in Table 8.1 is to be pumped
from 25 to 100 psi. The inlet temperature is
10
◦
C. Use the Pump block to calculate
the horsepower required if the pump's efficiency is 80%.
−
TABLE 8.1 Feed for All Chapter 8 Workshops
Component
Abbreviation
Lbmol/Hr
Methane
C1
0.1
Ethane
C2
1
Propane
C3
10
n
-Butane
NC4
18.9
1-Butane
1C4
20
1,3-Butadiene
DC4
20
Workshop 8.2
The feed of Workshop 8.1 is a vapor at 100 psi and 100
◦
C. It is to
be compressed to 500 psi using a polytropic compressor with an efficiency of 100%.
The efficiency of the motor driving the compressor is also 100%. Use the Compr block
to calculate the performance of the compressor and the outlet state of the product.
Workshop 8.3
Repeat Workshop 8.2 using an isentropic compressor that operates
reversibly (i.e., its isentropic efficiency is 100%). The efficiency of the motor driving
the compressor is also 100%.
Workshop 8.3a
Repeat Workshop 8.3 with an isentropic efficiency of 0.8.
Workshop 8.4
Repeat Workshop 8.2 using a two-stage isentropic compressor where
both stages and motors have 100% efficiencies. No interstage coolers are to be used.
All pressure drops are zero. Use the block MCompr to calculate the compressor's per-
formance and the state of the outlet stream. Compare results to those of Workshop 8.1.
Workshop 8.5
Using Workshop 8.4 as a base case, run case studies to determine the
effect of an intercooler between stages 1 and 2 of the compressor. For the case studies,
specify the heat removed as 0, 50,000, 100,000, 175,000, and 200,000 Btu/hr. Show
the effect of heat removal on total brake horsepower, total heat removal, temperature
of the gas at the outlet of stage 1 of the compressor, and temperature of the gas at the
outlet of the cooler.
Workshop 8.5a
Repeat the 175,000-Btu/hr heat removal case from Workshop 8.5
but include a liquid removal stream.
