Consider a pumping system used in a cooling water loop. Water is drawn from a tank, which maintains a height of 2 m of water. It then enters the pump and then passes through the process heat exchanger, where it is heated. The water is then cooled back to cooling water temperature using a chiller (another heat exchanger). Finally, water exits the chiller and is circulated back to the original tank, forming a closed loop. All equipment is at ground level. All pipe in the system is 2-inch schedule 40, commercial steel pipe. a. If the flowrate is 15 kg/s, determine the Fanning friction factor in the pipe using the Colebrook Equation. b. At a flowrate of 15 kg/s, the heat exchanger and chiller each have a pressure drop of 15 kPa. Estimate the equivalent length of each heat exchanger. c. In addition to the heat exchangers and 35 m of straight pipe, there are the following valves and fittings: 90° elbows Tee Open gate valve Swing check valve x 1 If the flowrate is 15 kg/s, determine the work required (in kW) for a 75% efficient pump. You may ignore entrance and exit effects. d. Determine the pressure increase across the pump. e. If an orifice plate with = 0.5 is used to measure the flowrate, what would the pressure drop across the plate be? f. If the pump is 25 kW, what diameter of pipe should be used? x 6 x 2 x 6
Consider a pumping system used in a cooling water loop. Water is drawn from a tank, which maintains a height of 2 m of water. It then enters the pump and then passes through the process heat exchanger, where it is heated. The water is then cooled back to cooling water temperature using a chiller (another heat exchanger). Finally, water exits the chiller and is circulated back to the original tank, forming a closed loop. All equipment is at ground level. All pipe in the system is 2-inch schedule 40, commercial steel pipe. a. If the flowrate is 15 kg/s, determine the Fanning friction factor in the pipe using the Colebrook Equation. b. At a flowrate of 15 kg/s, the heat exchanger and chiller each have a pressure drop of 15 kPa. Estimate the equivalent length of each heat exchanger. c. In addition to the heat exchangers and 35 m of straight pipe, there are the following valves and fittings: 90° elbows Tee Open gate valve Swing check valve x 1 If the flowrate is 15 kg/s, determine the work required (in kW) for a 75% efficient pump. You may ignore entrance and exit effects. d. Determine the pressure increase across the pump. e. If an orifice plate with = 0.5 is used to measure the flowrate, what would the pressure drop across the plate be? f. If the pump is 25 kW, what diameter of pipe should be used? x 6 x 2 x 6
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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![1. Consider a pumping system used in a cooling water loop. Water is drawn from a tank, which
maintains a height of 2 m of water. It then enters the pump and then passes through the process
heat exchanger, where it is heated. The water is then cooled back to cooling water temperature
using a chiller (another heat exchanger). Finally, water exits the chiller and is circulated back to
the original tank, forming a closed loop. All equipment is at ground level. All pipe in the system is
2-inch schedule 40, commercial steel pipe.
a. If the flowrate is 15 kg/s, determine the Fanning friction factor in the pipe using the
Colebrook Equation.
b.
At a flowrate of 15 kg/s, the heat exchanger and chiller each have a pressure drop of
15 kPa. Estimate the equivalent length of each heat exchanger.
c.
In addition to the heat exchangers and 35 m of straight pipe, there are the following
valves and fittings:
90° elbows
Tee
x 6
x 2
Open gate valve
x 6
Swing check valve
x 1
If the flowrate is 15 kg/s, determine the work required (in kW) for a 75% efficient pump.
You may ignore entrance and exit effects.
d.
Determine the pressure increase across the pump.
e. If an orifice plate with = 0.5 is used to measure the flowrate, what would the pressure
drop across the plate be?
f.
If the pump is 25 kW, what diameter of pipe should be used?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6353d21b-c4b2-4ac4-8578-e23f919431bd%2F79a4f690-41bf-4e31-a20b-ab59f1b9301c%2F1xr72h_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1. Consider a pumping system used in a cooling water loop. Water is drawn from a tank, which
maintains a height of 2 m of water. It then enters the pump and then passes through the process
heat exchanger, where it is heated. The water is then cooled back to cooling water temperature
using a chiller (another heat exchanger). Finally, water exits the chiller and is circulated back to
the original tank, forming a closed loop. All equipment is at ground level. All pipe in the system is
2-inch schedule 40, commercial steel pipe.
a. If the flowrate is 15 kg/s, determine the Fanning friction factor in the pipe using the
Colebrook Equation.
b.
At a flowrate of 15 kg/s, the heat exchanger and chiller each have a pressure drop of
15 kPa. Estimate the equivalent length of each heat exchanger.
c.
In addition to the heat exchangers and 35 m of straight pipe, there are the following
valves and fittings:
90° elbows
Tee
x 6
x 2
Open gate valve
x 6
Swing check valve
x 1
If the flowrate is 15 kg/s, determine the work required (in kW) for a 75% efficient pump.
You may ignore entrance and exit effects.
d.
Determine the pressure increase across the pump.
e. If an orifice plate with = 0.5 is used to measure the flowrate, what would the pressure
drop across the plate be?
f.
If the pump is 25 kW, what diameter of pipe should be used?
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