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A proposed alternate form for the heat exchanger described in Problem 10.37 is shown in Fig. 10.33 The entire flow conduit is a %-in steel tube with a wall thickness of
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Applied Fluid Mechanics (7th Edition)
- 5. A duct of 0.45 m diameter and 90 m long leads from a fan discharge chamber where the pressure is 15 mm of water to a plenum chamber where the pressure is 10 mm of water. In order to increase the flow, two alternatives are considered. One is to lay a duct of 0.3 m diameter and 90 m long in parallel with the duct of 0.45 m diameter. The other is to increase the diameter of 0.45 m diameter duct for the last 60 m length. Calculate the increased diameter so that this method gives the same flow as the 0.45 m and 0.3 m ducts in parallel. Assume that the pressures in the fan chamber and plenum chamber are unaffected by changes in the flow and consider duct friction losses only. The friction factor may be taken as 0.0o55. 6. A 0.3 m diameter circular duct carries standard air at a velocity of 360 m/min. It is replaced by a rectangular duct having the same pressure loss per unit length due to friction. Determine the dimensions of the rectangular duct if the aspect ratio is to be 1.5 for (a)…arrow_forwardA piping system is to be installed at place where the pump will transfer the fluid from tank A to tank B. There are two suggested piping designs available to carry the fluid efficiently. Compute and determine which of the available piping arrangement will experience the less pumping powerwith given flow conditions. Discuss the results. Flow conditions are same for both type of designs and given as: Pipe material: stainless steel Volume flow rate: 40 L/sec Assume the working fluid is water at standard atmosphere temperature and both tanks areopen to atmosphere. Pipe inlet is sharp-edged and bends are sharped without vanes. Elevations are as ?? = ?? ? and ?? = ?? ?arrow_forwardProblem 01 Find the least number of 150 mm diameter pipes required to transmit 170 kW to a machine 3.2 km from the power station, if the efficiency of transmission is to be 90 per cent and f= 0.0075. The feed pressure is 4800 kN/m². Collutate of Pipes required efficiency= Problem 02 A turbine of efficiency 78% is 750 m lower than the supply water source. The pipe supplying the turbine with water is 200 mm in diameter and 4,5 km long. Take f=0,008 and determine the maximum power output that can be expected from the turbine. Problem 03 A pipeline is 1800 m long and 375 mm in diameter, and supply head at inlet is 240 m. A nozzle with an effective diameter of 50 mm is fitted at the discharge end and has a coefficient of velocity of 0,972. If for the pipe is 0,005. (a) The velocity of the jet (b) The discharge (c) The power of the jet C1Regarrow_forward
- Problem 10.1 Water flows steadily through a 180° reducing pipe bend as shown in the figure (notice the transition from a larger diameter at section 1 to a smaller diameter at section 2). The atmospheric pressure outside the piping system is Patm = 100 kPa. The pipe bend is connected to the two pipes by flanges. The flanges are held together by flange bolts. Assume the density of water is 1000 kg/m³. At the inlet to the bend, the pressure is P₁ = 350 kPa, the pipe diameter is D₁ = 25 cm, and the water velocity is V₁ = 2.2 m/s. At the outlet of the bend, the pressure is P₂ = 120 kPa and the pipe diameter is D₂ = 8 cm. The weight of the pipe bend and the water in the bend may be neglected for this analysis. 1 5 G 2 (a) Determine the velocity of the water at the outlet (i.e., at Section 2). Hint: Use CoM principles (and don't forget to draw a system diagram!). (b) Draw appropriate system diagrams to determine the total force acting on the flanges (to keep the system in equilibrium). You…arrow_forwardDetermine the smallest metric hydraulic copper tube size that will carry 4L/min of the following fluids while maintaining laminar flow: (a) water at 40°C, (b) gasoline (SG=0.68) 25°C, (c) ethyl alcohol (SG=0.79) at 0°C, and (d) heavy fuel oil at 25°C.arrow_forwardSelect the proper-sized steel tube for a flowrate of 25 gpm and an operating pressure of 1,000 psi. The maximum recommended velocity is 20 ft/s and the factor of safety 8. The tube is made out of SAE 1010 with a tensile strength of 55,000 psi. TUBE ID WALL THICKNESS (in) WALL THICKNESS (in) (in) 0.055 TUBE TUBE ID (in) 0.430 0.402 0.370 OD (in) 7/8 0.310 TUBE WALL OD THICKNESS (in) (in) 1/8 0.035 3/16 1/4 5/16 3/8 0.035 0.035 0.049 0.065 0.035 0.049 0.065 0.035 0.049 0.065 0.118 0.180 0.152 0.120 0.243 0.215 0.183 0.305 0.277 0.245 TUBE OD (in) 1/2 5/8 3/4 0.035 0.049 0.065 0.095 0.035 0.049 0.065 0.095 0.049 0.065 0.109 0.555 0.527 0.495 0.435 1 1-1/4 0.652 0.620 0.532 1-1/2 0.049 0.065 0.109 0.049 0.065 0.120 0.065 0.095 0.120 0.065 0.095 TUBE ID (in) 0.777 0.745 0.657 0.902 0.870 0.760 1.120 1.060 1.010 1.370 1.310arrow_forward
- the pressurt the pump. 2.10-10. Flow in an Annulus and Pressure Drop. Water flows in the annulus of a hori- zontal, concentric-pipe heat exchanger and is being heated from 40°C to 50°C in the exchanger which has a length of 30 m of equivalent straight pipe. The flow rate of the water is 2.90 x 10 3m/s. The inner pipe is 1-in. schedule 40 and the outer is 2-in. schedule 40. What is the pressure drop? Use an average temper- ature of 45°C for bulk physical properties. Assume that the wall temperature is an average of 4°C higher than the average bulk temperature so that a correction can be made for the effect of heat transfer on the friction factor. ompnongibia Flow Starting witharrow_forwardSaturated 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. * 125 m 12 m -5 1 50 m 5-in. pipe schedule pump Your answerarrow_forwardAs shown in the figure, the water flows from the ground floor of a three-storey house to the second floor through pipes of 20 mm diameter (average roughness of the pipe material = 0.0015 mm) at a volumetric flow rate of 0.75 L / s. Water is discharged from the system to atmospheric pressure through a tap with a 12 mm diameter outlet. There are 4 winged elbows, one ball valve and one faucet throughout the installation. Calculate the effective pressure at point 1. (pwater=998 kg/m3, uwater=1.12x10-3 Pa s, g=9.81 m/s2)arrow_forward
- Calculate the power supplied to the pump shown if its efficiency is 75%. Water is at 25 degrees Celsius is flowing at the rate of 50.0 m3/h. The suction linf is a standard DN 100 Schedule 40 steel pip, 15m long. The total length of DN 50 Schedule 40 steel pipe in the discharge line is 200m. The elbows are tight, the entrance to the pipe is flush and the globe valve is completely open. Draw the line of total and piezometric heights.arrow_forwardWasit University / College of Engineering Section 10: Pipe Design 10.8 Example Determine the pressure or head losses for a 25 mm threaded steel pipe tee flowing 25% to the side branch, 75% through. The entering flow is 1 L/s at velocity of 1.79 m/s.arrow_forward10. Two galvanized iron pipes of diameter D are connected to a large water reservoir as shown. Pipe A has length L and pipe B has length 2L. Both pipes discharge to atmosphere. Which pipe will pass larger flow rates? Justify (without calculating the flow rate in each pipe). Compute the flow rates if H=10 m, D=50 mm, and L=61 m. D Pipe A, length: L Pipe B length: 2Larrow_forward
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