ASHRAE Journal - January 2013 - 32

This second edition of Procedures for Commercial Building Energy Audits provides a reference guide for building owners, managers, and government entities on what to expect from an audit, establishes guidelines for levels of audit efforts, and introduces good procedures for energy auditors. This edition has been expanded to include updated guidance on energy auditing methods and new and useful reference materials. Features of this edition include: • Widely cited definitions of standard audit levels used in the industry • Energy auditing best practices that professionals can apply in their field work • Spreadsheet templates to assist in basic analysis as well as forms suitable for field collection of detailed commercial building data, available in the appendices and online • Key information on conducting effective energy audits that lead to actionable audit reports • Illustrative graphs and photos In addition, this book discusses how to build a successful team, analytical methods, successful approaches to site visits, incorporating on-site measurements, economic evaluation of measures, and how to organize an energy audit report that promotes action on the part of building owners and managers.

American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. 1791 Tullie Circle Atlanta, GA 30329-2305 Phone: 404-636-8400 (worldwide) www.ashrae.org

ISBN 978-1-936504-09-1

9 781936 50409 1

Product code: 90450

9/11

PCBEA Cover.indd 1

Thermally Active Floors

Part One

R

By Daniel H. Nall, P.E., FAIA, Member ASHRAE

adiant conditioning has a long history going back to ancient China, thousands of years before the Roman Baths.1 It takes advantage

of the fact that for low ambient air velocities, radiant heat transfer between the clothed body and surrounding surfaces is equal to or greater than convective heat transfer of the clothed body.2 For most buildings, the interior surfaces of the exterior partitions, exposed on their outer surfaces to the weather, will have the most extreme temperatures in the enclosure. Radiant conditioning balances the radiant

Radiant delivery of space conditioning is attractive because of its inherent transport efficiency and because of its space efficiency. Because of the greater specific heat and density of water, heat can be transported to or from a space using water with between 10% and 20% of the amount of transport energy required when using air as the medium for moving heat. Similarly, the space requirements for hydronic transport of heat within the building are significantly less than those for transport by heated or cooled air. Avoided ductwork, airhandling capacity and architectural ac-

interaction between occupants and enclosure, both by offsetting the About the Author radiant effects of the exterior partitions, and by interacting radiantly with these surfaces to bring them closer to the desired temperature.3
32 ASHRAE Journal ashrae.org

Daniel H. Nall, P.E., FAIA, is senior vice president at WSP Flack + Kurtz in New York. He is an ASHRAE certified Building Energy Modeling Professional and High-Performance Building Design Professional.

January 2013
ASHRAE Journal - January 2013

Table of Contents for the Digital Edition of ASHRAE Journal - January 2013
