Name:
PE 3073
PRODUCTION ENGINEERING I
Dr. O. Shoham Fall 2014
Midterm Exam
Problem 1
Water is pumped at a rate of q 40,000 bbl/day through a piping system, as shown in the
figure below. The pumping system consis
...
Name:
PE 3073
PRODUCTION ENGINEERING I
Dr. O. Shoham Fall 2014
Midterm Exam
Problem 1
Water is pumped at a rate of q 40,000 bbl/day through a piping system, as shown in the
figure below. The pumping system consists of a horizontal section ( 0) with a length
of L = 1,000 ft. that is followed by a vertical section ( 90) of a height of H = 100 ft. .
The diameter of both sections is d = 8 in. . The pump suction (inlet) pressure is p1 = 14.7
psia, the outlet pressure of the piping system is p2 = 200 psia, the water density is 62.4
lbm/ft3 and the friction factor (Moody) is f = 0.0195. (Recall: 1bbl = 5.615 ft3).
Determine (neglect the accelerational pressure gradient):
1. The pressure drop in the piping system
2. The pump pressure “boost”. This is the pressure increment delivered by the pump.
Problem 2
Oil and natural gas flow downwards in a 2.54-cm-ID 1,000 m long smooth pipe, which is
inclined downwards. The volumetric flow rates are is qO 0.001 m3/s and
0.00625
qG m3/s, and the liquid holdup is HL 0.95 . The pipe inlet and outlet
pressures are the same, namely, 20 psia, and the fluid properties are:
O 1,000 kg/m3 ; O 1cp 1103kg/ms ,
G 1.6 kg/m3 ; G 0.02cp 0.02103kg/ms .
Determine the inclination angle of the pipe.
Assume all flow conditions are constant. Utilize the homogenous no-slip frictional
pressure gradient model and neglect the accelerational gradient. Use the Blasius equation
for determining the friction factor, namely, fM 0.184Re0.2
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