PSE 360 HW 2 Due January 25, 2024
For all problems, assume the entrance is inward projecting (K factor = 0.78) See Cameron 3-130
1.
(20 points) We need to pump water at a flow rate of
1300 gpm between two atmospheric tanks. The
suction piping is comprised of 25 feet of 8-inch
Sch.40 steel pipe and one gate valve and one check valve. The discharge line contains
200 feet of 6-inch Sch.40 pipe and two standard 90
o
elbows and one gate valve. The
difference in elevation between the two tanks is 30 ft. Calculate
a)
(10 points) the pump size (BHP) required assuming a pump efficiency of 70%
b)
(10 points) the delta Pressure across the pump (psi)
2.
(10 points) It is desired to pump water to an elevation 70 feet above the level in a tank
at a flow rate of 1200 gpm. The flow is from one tank to another. You have a centrifugal pump available that will deliver a total head of 210 feet of water. It is estimated that 1000 feet of piping will be required with 4 - 90-degree elbows and one gate valve. Calculate the Sch. 40 pipe size you would recommend.
3.
(10 points) A 2-inch Sch. 40 steel pipe delivers water to the bleach plant. Two
pressure gauges in the line read 80 psi and 50 psi. Between the gauges are 200 feet of
pipe containing 12 standard 90
o elbows and one fully open globe valve. The down
stream gauge is 15 ft above the upstream gauge. What is the flow rate in (GPM) in the
pipe under these conditions?
4.
(10 points) Water flows steadily down the inclined, 3/4 in Type K copper tubing.
Two pressure gauges 100 ft apart indicate identical pressures. Find the flow rate in
gpm.
To receive credit, you must show ALL work, box in final answers, and complete each problem on
a new page. This homework will be graded out of a total of 50 points.
40°
100 ft
