CHME 333 Workbook - Chapter 3b HANDOUT

CHME 333 Workbook - Chapter 3b HANDOUT - CHME 333 Workbook...

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1 CHME 333 Workbook Chapter 3 – One-dimensional, Steady State Conduction Heat Transfer from Extended Surfaces (Fins) Objectives o Understand how to apply HDE, simplifying assumptions, and boundary conditions to heat transfer from extended surfaces o Perform calculations for single fins and for arrays of fins. Introduction In the latter part of Chapter 3 we will consider heat transfer from extended surfaces. An extended surface (also know as a combined conduction-convection system or a fin) is a solid within which heat transfer by conduction is assumed to be one dimensional, while heat is also transferred by convection (and/or radiation) from the surface in a direction transverse to that of conduction. Extended surfaces, or fins, are used to enhance heat transfer primarily for systems where the fluid is a gas. There are numerous applications of fins in daily life – engine radiators, computer chips, air conditioners, refrigerators, heater cores, etc. Review – solving these problems will use the same methodology as previous sections in Chapter 3 o _________________________________________________________ o _________________________________________________________ o _________________________________________________________
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2 Extended Surfaces o Three ways to enhance heat transfer by convection from a given object ± _______________ ± _______________ ) ( = T T hA q s ± _______________ o In many applications, design constraints and practicality limit options 1 & 2, so increasing the available area is the only realistic option.
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This note was uploaded on 03/11/2011 for the course CHEME 333 taught by Professor Anthony during the Spring '11 term at UNL.

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CHME 333 Workbook - Chapter 3b HANDOUT - CHME 333 Workbook...

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