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- While planning a future expansion, a water distribution pipe will be replaced as shown in Figure 2. The current plan is for the new configuration to have the same head-loss between points A and B once the new pipes are laid. Considering that the physical characteristics of these new pipes will be identical to the previously laid pipe (L, D, CHW), (A) what will the new operational flow be? After years of wear and tear while operating above the required flow, the pipes have prematurely degraded. The Hazen-Williams coefficients have dropped to: CHW₁= 130, CHW2= 135, CHW3= 125. You must now (B) quantify the head-loss between points A and B for an operational flow of 200 l/s. A -▬▬▬▬▬▬▬▬▬▬▬▬▬▬ LA-B = 150 m D = 0.15 m Qoperational =50 1/s CHW= 150 B ▬▬▬▬▬ A ▬▬▬▬▬▬ Pipe 1 Pipe 2 Pipe 3 Figure 2 Initial (left) and future (right) pipe configuration BGlycerin flows at 35 m through a 150 mm diameter new wrought iron pipe at a velocity of 3 m/s. It has an absolute viscosity of 1.50 Pa-s and a specific gravity of glycerin = 1.26. 2. What is the type of flow?If a sewer line has an outside diameter of 0.5 m and internal diameter of 0.4 m and design to holds a maximum of 60 kg/s of wastewater flowrate from a food manufacturing industry. What will be the pressure inside the steel pipe? Allowable stress of carbon steel pipe is 6900 Pa. * O 2.76 kPA 3000 kPa 800 Pa 567 Pa
- 3. It is desired to deliver 60 m3/h of water at 20◦C through 100 m of horizontal asphalted cast iron pipe. The pressure drop for the length of pipe cannot exceed 50 kPa. What is the smallest commercially available pipe diameter that will accomplish this? A good place to start your analysis is the 3 in nominal pipe, but this is not the answer.Explain how the suction height of a turbine above tail race is limited by cavitation?Wire-pipe designs of wet ESPs can achieve higher efficiencies. Why?
- A smooth concrete pipe with a 1.5 ft diameter carries carbon tetrachloride at 20 C from a tank to a facility 1 mile away, where it discharges into the air. The pipe begins in the tank 3 feet below the surface and descends on a 1:100 (vertical: horizontal) slope. Determine the flow rate, assuming minor losses are negligible.(b) Relate how the momentum equations may be derived using fluid parameters.10.20 Determine the energy loss for a sudden contraction from a DN 125 Schedule 80 steel pipe to a DN 50 Schedule 80 pipe for a flow rate of 500 L/min.
- It is required to pump water at the rate of 8.750 gpm from a reservoir whose surface is at an elevation of 180 ft to a tank whose bottom is at an elevation of 372 ft, The pump is placed at an elevation of 192 ft, the diameter of the suction pipe is 30 inch, the length of the pipe from the pump to the tank is 290 ft, and the estimated size of this pipe is 24 inch. The sum of the minor head losses in the suction and discharge pipe may be taken as 1.5 ft, if the maximum depth of water in the tank is to be 25 ft, what is the required horsepower of a pump for which the overall efficiency is 67 percent? Assume head loss due to friction in 290 ft + 2 ft Neglect all other head losses.A concrete pour of 1080 cum is planned with a 120 cum/hr capacity. If the efficiency of the plant is assumed to 75%, what will be approximate time taken for completing pour? theWater is flowing at a rate of 700 gpm through a horizontal 6 inch schedule 80 commercial steel pipe at 900F. If the pressure drops by 2.23 psi over a 100 ft length of pipe: (a) What is the value of the Reynolds number? (b) What is the magnitude of the pipe wall roughness?