Engineered Systems - January 2009 - (Page 4) c 48 57 65 contents FEATURES F 30 Floored! Don’t g to the AHR Expo and just start wandering around. Time get is money, and you can profit with a little advance research. From air a curtains to water heaters, from BAS to VRF, review these company-submitwate ted descriptions of new products released since last year’s extravaganza. Identify just a few targets of interest before you take off for Chicago, and these units won’t be the only ones boasting about improved efficiency. January 2009 COVER STORY 26 — Compiled by ES staff CHILLED BEAMS C Chilled Beams: The Science Of Lab Cooling T This cooling technology continues to expand its presence in the cool United States. Here, the author delves into the functional criteria and States operational benefits for using chilled beams, highlighting the system at one medical school’s large research facility. — by Geoffrey P. McMahon, P.E., LEED® AP 82 S SUSTAINABLE BUSINESS E Engineering Economics Goes Green, Part 1 BOILERS Don’t Get Burned By A Boiler D Retrofit Project R When it co comes to that unexpected (and unwelcome) development, it’s usually les a case of if than when. Avoiding confusion over the less specific technical scope of work up front, keeping an eye on codes and insurance, and considering contingencies for discovered problems along the way will smooth the path as much as possible. What financing challenges did the first ancient Egyptian engineer face? After setting the table with that interesting scenario, we move on to modern engineering economics. There, calculating the cost of generating one dollar of savings is joined by the value of assessing the oft-overlooked cost of doing nothing. The result is a stronger argument for sustainable building and retrofitting in the contemporary age, and that’s no pyramid scheme. — by Larry Clark, LEED® AP — by John R. Puskar, P.E. DEPARTMENTS Advertiser Index . . . . . . . . . . . . . . . . .104 104 Back2Basics. . . . . . . . . . . . . . . . . . . . . 14 Building Automation. . . . . . . . . . . . . . . 22 Case In Point . . . . . . . . . . . . . . . . . . . 16 Classifieds . . . . . . . . . . . . . . . . . . . . .101 Commissioning. . . . . . . . . . . . . . . . . . . 20 Computers & Software. . . . . . . . . . . . . 92 Editor’s Note. . . . . . . . . . . . . . . . . . . . . . 9 Efficiency Incentives. . . . . . . . . . . . . . . 24 Glossary . . . . . . . . . . . . . . . . . . . . . . .100 HVACR Designer Tips . . . . . . . . . . . . . 28 Humidification Update . . . . . . . . . . . . . 85 Issues & Events . . . . . . . . . . . . . . . . . . 86 Letters . . . . . . . . . . . . . . . . . . . . . . . . . 10 Literature & Catalogs . . . . . . . . . . . . . . 97 Products . . . . . . . . . . . . . . . . . . . . . . . . 94 Tomorrow’s Environment . . . . . . . . . . 106 IAQ / VENTILATION Simulation-Driven HVAC Design S Despite how the song goes, there actually is something like the real thi Here, one consulting firm reports on its own use of thing. CFD — when to deploy it, how to incorporate it in given situations, and what kinds of benefits it can yield. From identifying trouble spots in fume ventilation to making a school district more comfortable with committing to underfloor air, the advantages can add up. — by Barry J. Stamp, P.E., LEED® AP and Steve T. Maxon, P.E., LEED AP LIFE SAFETY 76 Floor Pressurization As A Means F Of Controlling Smoke During A O High-Rise Fire H With advanced strategies and software, total evacuation need not be the last word(s) in life safety strategy. The size and role of elevator shafts, selective pressurization, and the ability to evaluate multiple reactions quickly may combine to form a safer and swifter reaction to the threat of flames and smoke. — by W. Z. Black, Ph.D, P.E. 4 En gi neer ed Sy stem s January 2009
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