Solucionario De Transferencia De Calor De Cengel

Complete Solution Manual to Accompany

HEAT TRANSFER
A Practical Approach
YUNUS A. CENGEL

SECOND EDITION

Preface
This manual is prepared as an aide to the instructors in correcting homework assignments, but it can also be used as a source of additional example problems for use in the classroom. With this in mind, all solutions are prepared in full detail in a systematic manner, usinga word processor with an equation editor. The solutions are structured into the following sections to make it easy to locate information and to follow the solution procedure, as appropriate: Solution Assumptions Properties Analysis Discussion The problem is posed, and the quantities to be found are stated. The significant assumptions in solving the problem are stated. The material propertiesneeded to solve the problem are listed. The problem is solved in a systematic manner, showing all steps. Comments are made on the results, as appropriate.

A sketch is included with most solutions to help the students visualize the physical problem, and also to enable the instructor to glance through several types of problems quickly, and to make selections easily. Problems designated with the CDicon in the text are also solved with the EES software, and electronic solutions complete with parametric studies are available on the CD that accompanies the text. Comprehensive problems designated with the computer-EES icon [pick one of the four given] are solved using the EES software, and their solutions are placed at the Instructor Manual section of the Online Learning Center (OLC) atwww.mhhe.com/cengel. Access to solutions is limited to instructors only who adopted the text, and instructors may obtain their passwords for the OLC by contacting their McGraw-Hill Sales Representative at http://www.mhhe.com/catalogs/rep/. Every effort is made to produce an error-free Solutions Manual. However, in a text of this magnitude, it is inevitable to have some, and we will appreciate hearingabout them. We hope the text and this Manual serve their purpose in aiding with the instruction of Heat Transfer, and making the Heat Transfer experience of both the instructors and students a pleasant and fruitful one. We acknowledge, with appreciation, the contributions of numerous users of the first edition of the book who took the time to report the errors that they discovered. All of theirsuggestions have been incorporated. Special thanks are due to Dr. Mehmet Kanoglu who checked the accuracy of most solutions in this Manual. Yunus A. Çengel

July 2002

Chapter 1 Basics of Heat Transfer

Chapter 1 BASICS OF HEAT TRANSFER
Thermodynamics and Heat Transfer 1-1C Thermodynamics deals with the amount of heat transfer as a system undergoes a process from one equilibrium state toanother. Heat transfer, on the other hand, deals with the rate of heat transfer as well as the temperature distribution within the system at a specified time. 1-2C (a) The driving force for heat transfer is the temperature difference. (b) The driving force for electric current flow is the electric potential difference (voltage). (a) The driving force for fluid flow is the pressure difference. 1-3CThe caloric theory is based on the assumption that heat is a fluid-like substance called the "caloric" which is a massless, colorless, odorless substance. It was abandoned in the middle of the nineteenth century after it was shown that there is no such thing as the caloric. 1-4C The rating problems deal with the determination of the heat transfer rate for an existing system at a specifiedtemperature difference. The sizing problems deal with the determination of the size of a system in order to transfer heat at a specified rate for a specified temperature difference. 1-5C The experimental approach (testing and taking measurements) has the advantage of dealing with the actual physical system, and getting a physical value within the limits of experimental error. However, this approach is...