Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
6th Edition
ISBN: 9780135257272
Author: James D. Halderman
Publisher: PEARSON
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Chapter 25, Problem 5RQ
Whit turbocharger control valves are needed for proper engine operation?
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Combustion gases from the exhaust of a boiler that come out at 300 °C and 1 atm, are usedto preheat to preheat water in an industrial facility by passing them through a benchof tubes, within which there is a mass flow of liquid water of 6 kg/s. TemperatureThe average wall surface of all pipes is 80°C. Gases enter the bank ofPerpendicular shaped tubes with a velocity of 4.5 m/s. The outer diameter of the tubes isof 2.1 cm, which are arranged in a manner aligned with longitudinal and transverse steps ofSL = ST = 8 cm. There are 16 columns in the direction of flow with eight tubes in each.Whereas exhaust gases have properties very similar to atmospheric air,Calculate the following:a) The average coefficient of heat transfer by convection, in [W/m2K]. (b) The amount of heat transferred per unit length of the tubes, in [W/m] c) The pressure drop through the tube bank, in [kPa]
During a visit to a plastic sheet factory, it is observed that a section of 45 mlength of a steam pipe, with a nominal diameter of 2 inches (6.03 cm in diameter)Outdoor plant) extends from one end of the plant to the other without any insulation. TheTemperature measurements at various points on the tube surface gave an average value170 °C, while the surrounding air temperature is 20 °C. The outer surfaceof the pipe is oxidized and its emissivity is 0.7 on average with a temperature of thearound 22 °C. Calculate the following:(a) The coefficient of convective heat transfer for the air surrounding the pipe.b) The amount of heat lost by convection and radiationc) The amount of energy that is lost in a full day, assuming conditions ofconstant temperature.
Chapter 25 Solutions
Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
Ch. 25 - What are the reasons why supercharging increases...Ch. 25 - Prob. 2RQCh. 25 - What are the advantages and disadvantages of...Ch. 25 - Prob. 4RQCh. 25 - Whit turbocharger control valves are needed for...Ch. 25 - The term volumetric efficiency refers to the...Ch. 25 - Boost pressure is generally measured in__________....Ch. 25 - Which valve is used on a factory supercharger to...Ch. 25 - How are most superchargers lubricated? a. By...Ch. 25 - How are most turbochargers lubricated? a. By...
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