A bundle of tubes consists of N tubes in a square aligned array for which ST-SL= 13 mm,each tube has an outside diameter of 10 mm and 1.5 m long. The temperature of the tubesurface was maintained at 100°C. If the air stream moves at 5 m/s and temperature of 25°C(at 1 atm) across the tubes bundle, how many tubes we need to achieve an outlet airtemperature of T≥ 80°C,? For the given conditions, calculate the total heat transfer rate tothe air, and the associated pressure drop across the tubes bank?

Given-Information:- N tubes ST=SL = 13 mm Outside Diameter, Do= 10mm Outside Length, Lo = 1.5 m…

Answered: s maintained at 100°C. If the

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Mechanical Engineering

s maintained at 100°C. If the

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.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.8P

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Concept explainers

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.

Question

A bundle of tubes consists of N tubes in a square aligned array for which ST-SL= 13 mm,
each tube has an outside diameter of 10 mm and 1.5 m long. The temperature of the tube
surface was maintained at 100°C. If the air stream moves at 5 m/s and temperature of 25°C
(at 1 atm) across the tubes bundle, how many tubes we need to achieve an outlet air
temperature of T≥ 80°C,? For the given conditions, calculate the total heat transfer rate to
the air, and the associated pressure drop across the tubes bank?

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