Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN: 9781305387102
Author: Kreith, Frank; Manglik, Raj M.
Publisher: Cengage Learning
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Chapter 10, Problem 10.4P
To determine

Overall heat transfer coefficient considering fouling factor.

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A liquid (SG = 0.8 and μ = 5 CP = 0.00336 lbm/ft s) from a solvent recovery plant is being pumped from a vessel into a reactor. The flow rate to the rector is 100 GPM (0.2228 ft³/s,) and the line, schedule 40-carbon steel (a = 0.0018 in). The pressure in the vessel is 15 psig and the reactor is pressurized to 65 psig. The flow into the reactor is 25 ft below the level in the vessel as shown in the drawing. The centrifugal pump is located 5 ft below the level in the vessel. The piping consists of the following: Suction line 10 ft of 2.5" Pipe Gate valves 90 degree elbows Check valves 2" sch 40 pipe 2.5" Sch 40 pipe Gate valve Check Valve 90° elbows 2 2 1 ID = 2.067" ID=2.47" K = 8 ft K= 100 fr K = 30 ff Discharge line 325 ft of 2" 2 5 none Acs=0.0233 ft² Acs = 0.0332 ft² a. Determine the velocity in the 2.5" and 2" lines (ft /s). b. Determine the losses due to friction in both the suction and discharge lines (ft lbi/lbm). c. Estimate the amount of total dynamic head required of the pump…
• A 6 MW generator had a thrust of 103,000 lb. The outside diameter of the step bearing is 12 in, and the inside diameter is 8 in. Employ a film thickness of 0.004 in. Use SAE 20 oil at 120 , the specific heat of the oil being 0.6 BTU/lb deg F, and density of 0.307 lb/cu. in Determine: (d) Temperature rise
A heat exchanger with an effectiveness of 75 percent is used to heat 5 kg/s of water from 2. ( 50 °C with condensing steam at 1 atm. Calculate the area for U = 1200 W/m2.°C. Suppose fouling occurred on both the tube and shell side with the following fouling factors, Rwater = 0.0002 m2-°C/W, and Risteam = 0.00009 m2. °C/W, what will be the new exiting temperature of the water?
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