Applied Fluid Mechanics: Global Edition
7th Edition
ISBN: 9781292019611
Author: Robert Mott
Publisher: Pearson Higher Education
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Chapter 18, Problem 18.28PP
For an aeration process, a sewage treatment plant requires
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The total length of pipe in the three inch branch is 20 ft, and the length of pipe in the one inch branch is 6 ft.
Brine (sg=1.04, m=10-3 Pa*s) flows at 250gpm through the entrance at point A.
Assume fully turbulent flow in both branches (f=ft).
Pipes are standard Schedule 40 steel pipes.
Assume the globe valve is partially shut so its equivalent L/D is 1000.
determine
The flow rate in both branches
The pressure drop in both branches
The overall resistance coefficient
Specifications:
The total length of pipe in the three inch branch is 10 ft, and the length of pipe in the one inch branch is 8 ft.
Brine (sg=1.04, m=10-3Pa*s) flows at 250gpm through the entrance at point A.
Assume fully turbulent flow in both branches (f=ft).
Pipes are standard Schedule 40 steel pipes.
Assume the globe valve is partially shut so its equivalent L/D is 1000.
For Part 1 of this project, you are tasked with determining the following:
The flow rate in both branches
The pressure drop in both branches
The overall resistance coefficient
Water at 15°C is flowing in a 3 inch horizontal Schedule 40 steel pipe at a pressure of 102 kPa. The pipe reduces to a 1.5 inch Schedule 40 steel pipe. What is the flow rate if pressure in the 1.5 inch pipe is 99.8 kPa?
Chapter 18 Solutions
Applied Fluid Mechanics: Global Edition
Ch. 18 - A pipe in a compressed air system is carrying 2650...Ch. 18 - Prob. 18.2PPCh. 18 - Prob. 18.3PPCh. 18 - A duct in a heating system carries 8320 cfm....Ch. 18 - The velocity of flow in a ventilation duct is 1140...Ch. 18 - Prob. 18.6PPCh. 18 - Prob. 18.7PPCh. 18 - Prob. 18.8PPCh. 18 - Prob. 18.9PPCh. 18 - Prob. 18.10PP
Ch. 18 - Prob. 18.11PPCh. 18 - Describe a centrifugal fan with forward-curved...Ch. 18 - Prob. 18.13PPCh. 18 - Prob. 18.14PPCh. 18 - Name four types of positive-displacement...Ch. 18 - Name a type of compressor often used for pneumatic...Ch. 18 - Prob. 18.17PPCh. 18 - Prob. 18.18PPCh. 18 - Prob. 18.19PPCh. 18 - Compute the specific weight of nitrogen at 32...Ch. 18 - Compute the specific weight of air at 1260...Ch. 18 - Prob. 18.22PPCh. 18 - An air compressor delivers 820 cfm of free air....Ch. 18 - Prob. 18.24PPCh. 18 - Prob. 18.25PPCh. 18 - Prob. 18.26PPCh. 18 - Specify a size of Schedule 40 steel pipe suitable...Ch. 18 - For an aeration process, a sewage treatment plant...Ch. 18 - Prob. 18.29PPCh. 18 - Prob. 18.30PPCh. 18 - Prob. 18.31PPCh. 18 - Prob. 18.32PPCh. 18 - Prob. 18.33PPCh. 18 - Prob. 18.34PPCh. 18 - Prob. 18.35PPCh. 18 - Figure 18.14 iD shows a two-compartment vessel....Ch. 18 - Prob. 18.37PPCh. 18 - Prob. 18.38PPCh. 18 - Prob. 18.39PPCh. 18 - A tank of Refrigerant is at 150 kPa gage and 20C....Ch. 18 - Prob. 18.41PP
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- Hint: For part (a), use conservation of energy equation (Bernoulli equation with losses) and assume the blower is just outside the control volume. Assume loss coefficients of 0.5 and 1.0 for entrance and exit, and that a plastic pipe is used (roughness = 0). Use the Colebrook or Haaland equation to approximate the friction factor. Also assume that the sum of the static pressure head and elevation head doesn't change significantly between the entrance and exit. In other words, although the elevation head will increase, the pressure head will decrease to compensate. This assumes the atmospheric pressure change is γ*Δz, which is a decent estimate for elevation changes less than ~1000 ft or so).- For part (b), use textbook equation 1.4 and assume a 100% efficient blower. Also, compare the power needed to power the blower with the world's largest non-hydro power plant in the…arrow_forward1. Installing larger diameter pipe in pumping system results in reduction in a. Static head b. Frictional head c. Both a and b d. None of the abovearrow_forwardQ.2) Determine the friction factor, “f” if Ethyl Alcohol at 25 C is flowing at 5.3 m/sec in a standard DN 40 Schedule 80 steel pipe.arrow_forward
- The pump in figure delivers water from the lower to the upper reservoir at the 2.0 ft^3/s.The energy loss between the suction pipe inlet and the pump is 6 lb-ft/lb and that between the pump outlet and the upper reservoir is 12 lb-ft/lb. Both pipes are 6-in Schedule 40 steel pipe. Calculate (a) the pressure at the pump inlet, (b) the pressure at the pump outlet, (c) the total head on the pump, and (d) the power delivered by the pump to the water.arrow_forwardAnswer the following: a.) Friction factorb.) Determine the pressure drop per meter of pipearrow_forwardProblem 3: A turbulent flow in a pipe has a Reynolds number of 200,000. The pipe diameter is 125 mm, andthe surface has the roughness of coarse concrete (use value in table on Moody diagram above for roughnessheight). Find the following:a. The Relative Pipe Roughness (?⁄?): ___________________________________b. Friction factor read from Moody Diagram: ______________________________c. Friction factor calculated with an appropriate formula: ____________________arrow_forward
- Saturated water at 310K is being pumped from a tank to an elevated tank at the rate of 7L/s. All of the piping is in 5-in. schedule 40 steel pipe. If the 2 fittings used is 90° ell standard long radius, The pump has an efficiency of 80%. Calculate the kW power needed for the pump.arrow_forward10.21 Determine the energy loss for a gradual contraction from a DN 125 Schedule 80 steel pipe to a DN 50 Schedule 80 pipe for a flow rate of 500 L/min. The cone angle for the contraction is 105. hL=0.224marrow_forwardRefer to Figure below. Heavy fuel oil at 60°F flows through the 3′′diameter endofpipe orifice, causing the deflection of the mercury in the U-tube gage. Determine the power in the jet.arrow_forward
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