Applied Fluid Mechanics (7th Edition)
7th Edition
ISBN: 9780132558921
Author: Robert L. Mott, Joseph A. Untener
Publisher: PEARSON
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Chapter 12, Problem 12.8PP
Solve Problem 12.3 using the Cross technique
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An automobile radiator is a compact heat exchanger powered by water-air. In both fluids does not interfere. There are 60 pipes with an inner diameter of 6.35 mm in the radiator. Of each pipe its length is 800 mm. Hot water enters the pipe at 85 ° and leaves at 55 ° C. Water flow 0.8 kg / s given as. The air enters the winged surfaces diagonally at 10 ° C and heats up to 35 ° C. emerges from the other side. Find the total heat transfer coefficient of the air side of the pipe.
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Chapter 12 Solutions
Applied Fluid Mechanics (7th Edition)
Ch. 12 - Figure 12.7 shows a branched system in which the...Ch. 12 - Using the system shown in Fig. 12.2 and the data...Ch. 12 - In the branched pipe system shown in Fig. 12.8...Ch. 12 - In the branched-pipe system shown in Fig. 12.9...Ch. 12 - A 160mm pipe branches into a 100mm and a 50mm pipe...Ch. 12 - For the system shown in Fig. 12.11 the pressure at...Ch. 12 - Solve Problem 12.4 using the Cross technique.Ch. 12 - Solve Problem 12.3 using the Cross techniqueCh. 12 - Find the flow rate of water at 60Fin each pipe of...Ch. 12 - Figure 12.13 represents a spray rinse system in...
Ch. 12 - Figure 12.14 represents the water distribution...Ch. 12 - Figure 12.15 represents the network for delivering...Ch. 12 - Work Problem 12.4 using PIPE-FLO software. Display...Ch. 12 - 2. Enhance the program from Assignment 1 so that...Ch. 12 - Write a program or a spreadsheet for analyzing...
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- A heat exchanger is required, which will be able to handle 0.0567 m3/s of water at 25 oC flowing through a smooth horizontal pipe with an equivalent length of 122 m. The total pressure drop is 103,000 Pa. What size pipe is required for this application? Assume that the pipe is isolated from the environment. Do not ignore friction losses. Hint: This is a trial and error problem.arrow_forwardMot water is used to heat air in a double-pipe heat exchanger as shown in the following sketch. If the heat transfer coefficients on the water side and on the air side are 550W/m2Kand55W/m2K respectively, calculate the overall heat transfer coefficient based on the outer diameter. The heat exchanger pipe is 5-cm, schedule 40 steel (k=54W/mK) with water inside.arrow_forward10.1 In a heat exchanger, as shown in the accompanying figure, air flows over brass tubes of 1.8-cm 1D and 2.1-cm OD containing steam. The convection heat transfer coefficients on the air and steam sides of the tubes are , respectively. Calculate the overall heal transfer coefficient for the heal exchanger (a) based on the inner tube area and (b) based on the outer tube area.arrow_forward
- Two-thirds of the energy content of fuel entering a 1,000-MWe nuclear power plant is removed by condenser cooling water that is withdrawn from a local river (there are no stack losses, as it the case for a fossil fuel-fired plant). Note, the 1,000-MWe refers to the actual electricity generated and sent to the power lines, after waste heat is taken away from cooling water. The river has an upstream flow of 100 m3/s and a temperature of 20 ̊ C.(a) If the cooling water is only allowed to rise in temperature by 10 ̊C, what flow rate from the river would be required? (b) How much would the river temperature rise as it receives the heated cooling water?arrow_forwardThe chief engineer at a university that is constructing a large number of new student dormitories decides to install a counter flow concentric tube heat exchanger on each of the dormitory shower drains. The thin walled copper drains are of diameter Di = 50 mm. Wastewater from the shower enters the heat exchanger at Th,i= 38°C while fresh water enters the dormitory at Tc,i= 10° The wastewater flows down the vertical wall of the drain in a thin, falling fil , providing hh = 10,000 W/m2. K.If the annular gap is d= 10 mm, the heat exchanger length is L= 1 m, and the water flow rate is m˙ =10 kg/min, determine the heat transfer rate and the outlet temperature of the warmed fresh water.If a helical spring is installed in the annular gap so the fresh water is forced to follow a spiral path from the inlet to the fresh water outlet, resulting in hc = 9050 W/m2.K, determine the heat transfer rate and the outlet temperature of the fresh water.Based on the result for part (b), calculate the daily…arrow_forwardFind the required area A for the heat transfer neglecting any convective heat transfer in the flows.A large condenser (heat exchanger) in a power plant must transfer a total of 100 MW from steam running in a pipe to sea water being pumped through the heat exchanger. Assume the wall separating the steam and seawater is 5 mm of steel, conductivity 16 W/m K and that a maximum of 3.5°C difference between the two fluids is allowed in the design. Find the required minimum area for the heat transfer neglecting any convective heat transfer in the flows.arrow_forward
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