Engineered Systems - March 2009 - (Page 4)

c 36 50 contents FEATURES T 30 Teaching An Old School New Tricks N In this overv of a three-school hydronics project in Texas, overview the author demonstrates how control is critical and why it’s worth putting some thought into alternate design scenarios along the way. He also offers a couple of tips for retrofits in constantly occupied spaces. — by Rolando Legarreta, P.E. March 2009 COVER STORY 30 CHILLERS B Basics For Absorption C Chillers If motor-dr motor-driven vapor compression chillers are much more energy efficient than absorption chillers, then why are we even having this conversation? In a hunt for LEED points or in applications with certain demands, absorption could be just the ticket to sustainability and/ or economy. — by Vincent A. Sakraida, P.E. , LEED® AP DEPARTMENTS Advertiser Index . . . . . . . . . . . . . . . . . . 61 Application Checklist . . . . . . . . . . . . . . 28 Back2Basics. . . . . . . . . . . . . . . . . . . . . 10 Building Automation. . . . . . . . . . . . . . . 24 Case In Point . . . . . . . . . . . . . . . . . . . 14 Classifieds . . . . . . . . . . . . . . . . . . . . . . 58 Commissioning. . . . . . . . . . . . . . . . . . . 22 Editor’s Note. . . . . . . . . . . . . . . . . . . . . . 8 Glossary . . . . . . . . . . . . . . . . . . . . . . . . 57 HVACR Designer Tips . . . . . . . . . . . . . 26 Tomorrow’s Environment . . . . . . . . . . . 62 ENGINEERED SYSTEMS (ISSN 0891-9976) is published 12 times annually, monthly, by BNP Media, 2401 W. Big Beaver Rd., Suite 700, Troy, MI 48084-3333. Telephone: (248) 362-3700, Fax: (248) 362-0317. No charge for subscriptions to qualiﬁed individuals. Annual rate for subscriptions to nonqualiﬁed individuals in the U.S.A.: $104.00 USD. Annual rate for subscriptions to nonqualiﬁed individuals in Canada: $137.00 USD (includes GST & postage); all other countries: $154.00 (int’l mail) payable in U.S. funds. Printed in the U.S.A. Copyright 2009, by BNP Media. All rights reserved. The contents of this publication may not be reproduced in whole or in part without the consent of the publisher. The publisher is not responsible for product claims and representations. Periodicals Postage Paid at Troy, MI and at additional mailing ofﬁces. POSTMASTER: Send address changes to: ENGINEERED SYSTEMS, P.O. Box 2149, Skokie, IL 60076. Change of address: Send old address label along with new address to ENGINEERED SYSTEMS, P.O. Box 2149, Skokie, IL 60076. Canada Post: Publications Mail Agreement #40612608. GST account: 131263923. Send returns (Canada) to Bleuchip International, P.O. Box 25542, London, ON, N6C 6B2. For single copies or back issues: contact Ann Kalb at (248) 244-6499 or KalbA@ bnpmedia.com. GREEN K-12 DESIGN A New Haven For S Sustainable Schools Dual-fuel boilers, demand controlled ventilation, therb mal storage … these are just a few tactics used in this Connecticut community’s long-term strategy to improve performance and drive savings. See how a team-wide, high-performance-design charrette got everyone pointed toward success from the start. — by Jim Seckel, P.E., LEED® AP and Webster Grouten, JR., LEED AP CORRECTION In the November 2008 issue, Table 3 of Rebecca Ellis' "Commissioning" column was misidentiﬁed. The correct title should be, "Late construction through post-occupancy commissioning fees." Engineered Systems regrets the error. 4 En gi n eer ed Sy stem s March 2009

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Engineered Systems - March 2009 Contents Editor’s Note Back2Basics Case In Point Commissioning Building Automation HVACR Designer Tips Application Checklist Teaching An Old School New Tricks Basics For Absorption Chillers A New Haven For Sustainable Schools Glossary Classifieds Advertiser Index Tomorrow’s Environment

Engineered Systems - March 2009

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