The ASHRAE Handbooks are the design standard for control of built environments with volumes on Systems and Equipment, HVAC Applications, Refrigeration and Fundamentals. Each is updated every four years. Installing fonts on mac os. 2009 ashrae handbook_-_fundamentals_(inch-pound_edition)_(ashrae,_2009) • 1. 2009 ASHRAE® HANDBOOK FUNDAMENTALS Inch-Pound EditionAmerican Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. 1791 Tullie Circle, N.E., Atlanta, GA 30329 (404) 636-8400 • ©2009 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers,Inc. All rights reserved. DEDICATED TO THE ADVANCEMENT OF THE PROFESSION AND ITS ALLIED INDUSTRIES No part of this publication may be reproduced without permission in writing fromASHRAE, except by a reviewer who may quote brief passages or reproduce illustrations ina review with appropriate credit; nor may any part of this book be reproduced, stored in aretrieval system, or transmitted in any way or by any means—electronic, photocopying,recording, or other—without permission in writing from ASHRAE. Requests for permis-sion should be submitted at www.ashrae.org/permissions. Volunteer members of ASHRAE Technical Committees and others compiled the infor-mation in this handbook, and it is generally reviewed and updated every four years. Com-ments, criticisms, and suggestions regarding the subject matter are invited. Any errors oromissions in the data should be brought to the attention of the Editor. Additions and correc-tions to Handbook volumes in print will be published in the Handbook published the yearfollowing their verification and, as soon as verified, on the ASHRAE Internet Web site. DISCLAIMER ASHRAE has compiled this publication with care, but ASHRAE has not investigated,and ASHRAE expressly disclaims any duty to investigate, any product, service, process,procedure, design, or the like that may be described herein. The appearance of any technicaldata or editorial material in this publication does not constitute endorsement, warranty, orguaranty by ASHRAE of any product, service, process, procedure, design, or the like.ASHRAE does not warrant that the information in this publication is free of errors. Theentire risk of the use of any information in this publication is assumed by the user. ISBN 978-1-933742-54-0 ISSN 1523-7222 The paper for this book is both acid- and elemental-chlorine-free and was manufactured with pulp obtained from sources using sustainable forestry practices. The printing used soy-based inks. • ASHRAE Research: Improving the Quality of Life The American Society of Heating, Refrigerating and Air- annually, enabling ASHRAE to report new data about materialConditioning Engineers is the world’s foremost technical society in properties and building physics and to promote the application ofthe fields of heating, ventilation, air conditioning, and refrigeration. Innovative technologies.Its members worldwide are individuals who share ideas, identify Chapters in the ASHRAE Handbook are updated through theneeds, support research, and write the industry’s standards for test- experience of members of ASHRAE Technical Committees anding and practice. The result is that engineers are better able to keep through results of ASHRAE Research reported at ASHRAE meet-indoor environments safe and productive while protecting and pre- ings and published in ASHRAE special publications and inserving the outdoors for generations to come. ASHRAE Transactions. One of the ways that ASHRAE supports its members’ and indus- For information about ASHRAE Research or to become a mem-try’s need for information is through ASHRAE Research. Thou- ber, contact ASHRAE, 1791 Tullie Circle, Atlanta, GA 30329; tele-sands of individuals and companies support ASHRAE Research phone: 404-636-8400; www.ashrae.org. Preface The 2009 ASHRAE Handbook—Fundamentals covers basic prin- • Chapter 20, Space Air Diffusion, has been completely rewritten tociples and data used in the HVAC&R industry. The ASHRAE Tech- harmonize with related chapters in other volumes, with major sec-nical Committees that prepare these chapters strive not only to tions on fully mixed, partially mixed, stratified, and task/ambientprovide new information, but also to clarify existing information, systems and the principles behind their design and operation.delete obsolete materials, and reorganize chapters to make the Hand- • Chapter 21, Duct Design, has new data for round and rectangularbook more understandable and easier to use. An accompanying CD- fittings in agreement with the ASHRAE Duct Fitting Database, asROM contains all the volume’s chapters in both I-P and SI units. Well as new content on duct leakage requirements, spiral duct This edition includes a new chapter (35), Sustainability, which roughness, and flexible duct pressure loss correction.defines this concept for HVAC&R and describes the principles, • Chapter 23, Insulation for Mechanical Systems, has added tablesdesign considerations, and detailed evaluations needed in designing from ASHRAE Standard 90.1-2007, and a new section on writingsustainable HVAC&R systems. Also new for this volume, chapter order and groupings have been • Chapter 24, Airflow Around Buildings, has added a detailed dis-revised for more logical flow and use.
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