8.2 Water at 35°C is pumped through a horizontal, 200-m-long, 30-mm-diameter tube at o.25 kg/s. Over time, a 2-mm-thick layer of scale of surface roughness e = 200 µm is deposited on the interior tube wall. Determine the pressure drop from the entrance to the exit of the tube and the required pump power for the clean and fouled conditions.

8.2 Water at 35°C is pumped through a horizontal, 200-m-long, 30-mm-diameter tube at o.25 kg/s. Over time, a 2-mm-thick layer of scale of surface roughness e = 200 µm is deposited on the interior tube wall. Determine the pressure drop from the entrance to the exit of the tube and the required pump power for the clean and fouled conditions.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.15P

See similar textbooks

Similar questions

water at 40°F flows at 1000 lb/hr through a sharp-edged 1/2 in diameter which is 10 inches long. if the tube wall temperature is 240°F, compute the exit temperature of the water
For the following situations of steady flow, calculate the Reynold's Number and determine whether flow is laminar, turbulent, or in the transition regionWater at 10°C flowing at an average velocity of 2 m/s in a 100-mm pipe.
Water is flowing in a long cylindrical tube at a mass flowrate of 0.01 kg/s. If the tube diameter is 10mm, water density is 1060 kg/m3 and water viscosity is 0.001 Pa.s, (i). calculate the Reynolds number of the flow; (ii). is the flow laminar or turbulent?
Determine the pressure drop experienced by air flowing isothermally at 30oC in a horizontal plastic hose (1/4 inch schedule 10), 20 m long. The flow rate is 70 L/min at the inlet pressure of 150 kPa. Assume a smooth inner surface for the pipe.
Consider air is flowing at the mean velocity of 0.7 m/s through a long 3.8-m-diameter circular pipe with e = 1.5 mm. Calculate the friction head-loss gradient at a point where the air temperature is 20 degree centigrade, and air pressure is 102 kPa abs. Calculate also the shear stress at the pipe wall and thickness of the viscous sublayer.
Water at a temperature of 35 °C is flowing steadily in a 2.5 mm diameter, 15-meter long tube at an average velocity of 0.60 m/sec. The cross-section is circular and the material is perfectly smooth. The flow can be considered fully developed. Find the pressure drop over the length of the tubing, Δ?
Air at 1 atm and 60°F is flowing through a 1 ft * 1 ft square duct made of commercial steel at a rate of 1600 cfm. Determine the pressure drop and head loss per ft of the duct.
For what value of Reynolds number flow is laminar in pipes and tubes?
Water at 75°C 3.83 x10-7m²&9.56 kN) (v= is Sm3. flowing in a standard hydraulic copper tube, 13.4mm diameter, at a rate of 12.9 L/min.Calculate the pressure difference between two points 45mapart if the tube is horizontal with friction factor 0.0205.
Water at 10oC enters a tube of 0.1 m diameter at the mean flow velocity of 0.4 kg/s. Calculate the exit water temperature if the tube is 15 m long and the wall temperature is constant 30oC.
Water at 20°C flows in a 100-mm-diameter new cast iron pipe with a velocity of 5.0 m/s. Determine the pressure drop in kPa per 100 m of pipe and the power lost (in kilowatts) to friction. Include a free body diagram of the problem.
Compute the heat-transfer coefficient for water flow inside the· tubes (8 mm ID) of an evaporator if the water temperature is 10°C and its velocity is 2 m/s.