Q5) Water at room temperature (density p = 1000 kg/m’, viscosity u = 1.12 ×10¬³ Ns/ m²) is pumped from a reservoir and flows through a 20.0 mm diameter copper tubing system (roughness, E = 0.015 mm) with a sharp-edge entrance at a flow rate = F L/min and exit through a angle valve of diameter 10.0 mm, as shown in Figure Q5. The type and diameters of all tubing in the pipe system are same. The tubing system has three 90° standard elbows. The globe and angle valves are fully open during operation. The water reservoir is maintained at a constant water level during operation. Determine the pump pressure rise (in kPa) for the above system if: i. All the losses in the drawn tubing, connectors and fittings are neglected. ii. All the losses in the drawn tubing, connectors and fittings are considered. 20

Q5) Water at room temperature (density p = 1000 kg/m’, viscosity u = 1.12 ×10¬³ Ns/ m²) is pumped from a reservoir and flows through a 20.0 mm diameter copper tubing system (roughness, E = 0.015 mm) with a sharp-edge entrance at a flow rate = F L/min and exit through a angle valve of diameter 10.0 mm, as shown in Figure Q5. The type and diameters of all tubing in the pipe system are same. The tubing system has three 90° standard elbows. The globe and angle valves are fully open during operation. The water reservoir is maintained at a constant water level during operation. Determine the pump pressure rise (in kPa) for the above system if: i. All the losses in the drawn tubing, connectors and fittings are neglected. ii. All the losses in the drawn tubing, connectors and fittings are considered. 20

Name: Q5) Water at room temperature (density p = 1000 kg/m³, viscosity µ =
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Description: Q5) Water at room temperature (density p = 1000 kg/m³, viscosity µ = 1.12 ×10¬³ Ns/m?) is pumped from a reservoir and flows through a 20.0 mm diameter copper tubingsystem (roughness, ɛ = 0.015 mm) with a sharp-edge entrance at a flow rate = F L/mina

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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Calculate the available net positive section head NPSH in a pumping system if the liquid density p 1200 kg/m'. The liquid dynamic viscosity u 0.4 Pa.s, the mean velocity a= 1 m/s, the static head on the suction side z = 3m, the inside pipe diameter di, = 0.0526m. the gravitational acceleration g = 9.81 m/s, and the equivalent length on the suction side EL, = 5.0 m. The liquid is at its normal boiling point. Neglect entrance and exit 1 losses.
3.3. Hagen-Poiseuille Flow: Fluid flows through a variable-diameter pipe as shown in the figure above. The pipe dimensions, flow rate, and fluid properties are as follows: L₁ L₂ L3 = 4 cm A₁ = 1 cm², A₂ = 4 cm². A3 = 0.25 cm² Q = 100 cm³/s p= 1.06 g/cm³ u = 3.5 cP segment 1 20₁ A₁ A₂ segment 2 L₂ Ap segment 3 L3 A3 → Use conservation of mass, the Hagen-Poiseuille relationship, and the electrical circuit analogy to answer the following: a) What should the total pressure drop be across the length of this variable-diameter pipe in order to provide the given flow rate Q? (Use the Hagen-Poiseuille relation and the electrical analogy; each segment is a resistor.) b) What is the average velocity u for each segment? (Mass conservation.) c) What is the Reynolds number (Re = – PHD) for each segment? d) What are the velocities at the centerline and at the wall for each segment?
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4. Find the head loss in a pipeline consisting of 200 ft of 4-in steel pipe, a 90° bend on 24-in radius (K = 0.15), 4-in gate valve (fully open) (K = 0.20), 100 ft of 4-in steel pipe, expansion to 6 in with a 20° taper (K = 0.4), 300 ft of 6-in steel pipe, abrupt contraction to 3-in diameter (K = 0.35), and 50 ft of 3-in steel pipe. The discharge rate is 1.5 cfs.
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A hydraulic pump is shown in the following Figure, flow rate is 25 L/min, the diameter of suction pipe is 25mm, and the suction port of pump is higher than the oil surface of tank, the height is h, Kinematic viscosity of oil is 30×10“m²/s, density of oil is 900kg/m³. Only the pressure loss along the straight suction pipe with length h is 75 considered, if the vacuum degree at the inlet of pump is not bigger than 4500P ( 2 = R. a = 2, g=9.8) (1) Calculate the flow velocity in the suction pipe; (2) Judge the flow state in suction pipe; (3) Calculate the pressure loss along the straight suction pipe; (4) Calculate the oil absorption height h.
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