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The pump is used to pump water through a run-around coil system which recovers energy from a contaminated extract air stream to preheat fresh air for the supply air stream. The pipe is 65 mm in diameter, total pipe length 130 m, the friction factor y = 0.02 and it contains two gate valves (= 0.2) and ten 90° bends (C=0.35). Assume that the pressure drop through each of the two run around coils may modelled by the equation ΔΡ = and for each coil Kcoil = 3 x10-5. Obtain the flow rate delivered by the pump and the power absorbed. Comment on the velocity in the piping system. Assume water density is 1000 kg/m³. coil

The pump is used to pump water through a run-around coil system which recovers energy from a contaminated extract air stream to preheat fresh air for the supply air stream. The pipe is 65 mm in diameter, total pipe length 130 m, the friction factor y = 0.02 and it contains two gate valves (= 0.2) and ten 90° bends (C=0.35). Assume that the pressure drop through each of the two run around coils may modelled by the equation ΔΡ = and for each coil Kcoil = 3 x10-5. Obtain the flow rate delivered by the pump and the power absorbed. Comment on the velocity in the piping system. Assume water density is 1000 kg/m³. coil

Elements Of Electromagnetics
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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A 260 mm diameter impeller centrifugal pump has the following characteristics at 1750 RPM 200 400 107 104 Q[l/min] 0 H [m] 106 600 95 800 1000 85 70 a) The pump is used to pump water through a run-around coil system which recovers energy from a contaminated extract air stream to preheat fresh air for the supply air stream. The pipe is 65 mm in diameter, total pipe length 130 m, the friction factor y = 0.02 and it contains two gate valves (= 0.2) and ten 90° bends (-0.35). Assume that the pressure drop through each of the two run around coils may modelled by the equation ΔΡ = = (28) ² and for each coil Kcoil = 3 x10-5. Obtain the flow rate delivered by the pump and the power absorbed. Comment on the velocity in the piping system. Assume water density is 1000 kg/m³. px b) If a geometrically similar pump with a 300mm diameter impeller running at 1150 RPM is used to replace the pump in (a) above, determine the volume which would be delivered and the power consumed by this pump.
Transcribed Image Text:A 260 mm diameter impeller centrifugal pump has the following characteristics at 1750 RPM 200 400 107 104 Q[l/min] 0 H [m] 106 600 95 800 1000 85 70 a) The pump is used to pump water through a run-around coil system which recovers energy from a contaminated extract air stream to preheat fresh air for the supply air stream. The pipe is 65 mm in diameter, total pipe length 130 m, the friction factor y = 0.02 and it contains two gate valves (= 0.2) and ten 90° bends (-0.35). Assume that the pressure drop through each of the two run around coils may modelled by the equation ΔΡ = = (28) ² and for each coil Kcoil = 3 x10-5. Obtain the flow rate delivered by the pump and the power absorbed. Comment on the velocity in the piping system. Assume water density is 1000 kg/m³. px b) If a geometrically similar pump with a 300mm diameter impeller running at 1150 RPM is used to replace the pump in (a) above, determine the volume which would be delivered and the power consumed by this pump.
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Comment on the velocity in the pipe. Is it laminar, is it turbulent?

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