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- 48. Water is flowing in a smooth pipe of diameter D. A section of this pipe hav- ing a length of L is heated. Water at the inlet to the heated section has a tempera- ture of Tŋ. Water temperature at the exit of the heated section is Tp. The heated section of the pipe wall is maintained at a constant heat flux so that a constant temperature difference of AT, = T, – T, exists between the wall and the bulk wa- ter temperature. Show that for turbulent flow in the pipe and a specified heated length and pipe diameter, water temperature at the exit of the heated section is given by: 402 0.6 Pr T52 =Tf +0.0876 L AT DO.8 0.2 mQ2:A) Define the bulk temperature (Tn), and prove that : T₁, - 2 ur dr B) Ethylene glycol flows at 0.01 kg/s through a 3 mm diameter, thin walled_tube. The tube is coiled and submerged in a well-stirred water bath maintained at 25 °C. If the fluid enters the tube at 85 °C, what heat rate and tube length are required for the fluid to leave at 35 °C ? At 60 °C, μ = 0.00522 kg/m.s, k = 0.26 W/m.K, C, 2562 J/kg.K. -a)Identifythe maximum velocitylimitof ammonia gas in the pipe if the flow is to be maintained as laminar flow. b)If the actual velocity of ammonia gas is 0.9 times the maximum velocitylimit, calculatethe heat transfer coefficient and heat transfer flux if the heat transfer area is 0.16m^2. c)Suppose the pipe has an outer diameter of 43.1 mm and the outer surface wall temperature of the pipe is 356 K, determinethe thermal resistance and thermal conductivity of the pipe.
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- An Unknown Liquid (SG. 0.6651) is flowing through a 59m long copper tube with a radius of 2.5mm at a rate of 0.09 kg/s. What is the head loss in meters, and the required pump power of the system in Watts. The Unknown Liquid has a viscosity of 0.2361 cpsSpherical particles of density 2000 kg/m3 and in the size range 20– 100 mm are fed continuously into a stream of water (density, 1000 kg/m3 and viscosity, 0.001 Pa s) flowing upwards in a vertical, large diameter pipe. You would like the velocity of the water be such that no particles greater than 50 mm are carried upward with the water. Determine the: a) maximum velocity of the water in m/s (Correct Answer: 1.218) b) if the water velocity was 85 % of the maximum, what diameter (mm) particles will be 100 % retained with the underflow? (Correct Answer: 36.13) I need help with how to get the answers please.1. Heated air at 1 atm and 35°C is to be transported in a 150-m-long circular plastic duct at a rate of 0.35 m³/s (Fig. 1). If the head loss in the pipe is not to exceed 20 m, using the Colebrook equation and consulting with the FE Reference Handbook and appropriate table(s) for equations and properties. Write a Matlab code to determine the i. ii. iii. iv. minimum diameter of the duct, the friction factor, average flow velocity and Reynolds number of the flow 0.35 m³/s air D -150 m Fig 1
- Water going into a pipe with a tempeture of T1 and going out T2 . ambient tempeture is T0. flow rate q. Develop an expression for T2 ( based on heat transfer) Length of the pipe Lh0 - convective heat transfer coefficient of the airhW -convective heat transfer coefficient of the waterk- pipe thermal conductivity (W/m·K)d – pipe diameter Use any other varilable that you need and can be found online easily .For a hydroelectric plant, a hydraulic turbine-generator is installed at the site below the free surface. The turbine drives a generator for electricity. The = 100kW. The shaft power elevation difference between the two free surfaces is h=20m. The power input from the fluid to the turbine is is W fluid output from the turbine is W = 80kW. sh (2)Calculate the mass flow rate in of the fluid. Turbine) O A. 510 kg/s B. 0.510 kg/s O C. 10.2 kg/s W₁ud O D.5.1 kg/s ff Wsh Generator WelecBA4s6nknAPkVXhnUEg rmResponse Good Luck... PROBLEM 1 Determine the following: a. Enclosed Area b. Perimeter of the thin walled tube Given is a thin-walled tube with the following data: Wall thickness-2mm ABC is a sector with a radius of 50 mm AOD & COD is a triangle C. Shear flow d. Shear stress e. Angle of twist Torque is 1000 N.m Length of the thin walled tube is 0.5 m Use G=24 GPa for aluminium A 90 B D 3R PROBLEM 2 Determine the following: a. Enclosed Area b. Perimeter of the thin walled tube c. Shear flow d. Shear stress Given is a thin-walled tube with the following data: Wall thickness- 3mm Torque is 900 N.m Length of the thin walled tube is 1.2 m. Use G=24 GPa for aluminium e. Angle of twist Ps Xd étv W