Engineered Systems - February 2008 - (Page 4) c 37 46 contents FEATURES 28 Chipping Away At Emissions Tighter air regulations and an abundance of trees have paired abunda up to fuel the move toward hybrid biomass boilers in these Canadian hospitals. Read about the upgraded systems’ differences and the considd erations for trading fossil fuels for sawdust, wo chips, and bark. wood February 2008 COVER STORY 28 — b Joanna R. Turpin by HOSPITAL DESIGN Predicting State-O State-Of-The-Art In Pittsburgh 37 Projects of a certain scope can simply ta a while, and such is the take case with this medical complex. We check in seven years after the site evaluation but still a year or two away from opening. It’s a good time to ask open some questions: How do you plan for equipme that isn’t invented yet? equipment How do you keep adjusting design once construction has started? Explore constru the obstacles — plus intricacies, such as how the BAS works with emergency power — that make such planning anything but child’s play. — by Arthur A. Bell, Jr., P.E. HUMIDIFICATION / IAQ HUMIDIFICATIO Eight Ways To Kee Legionella Keep Out Of Your Air Distribution Syste System Humidification, air intake location, and c cooling tower operation – these three components continue to requir vigilance in preventing require Legionella from cropping up. Smart choic from design through choices, ongoing maintenance, can prevent problems a protect health. and — by Matt Freije DEPARTMENTS Advertiser Index . . . . . . . . . . . . . . . . . . . . . . . . .73 Back2Basics. . . . . . . . . . . . . . . . . . . . . . . . . . . .10 10 Building Automation. . . . . . . . . . . . . . . . . . . . . .22 Case In Point . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Classifieds . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . .18 Editor’s Note. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Energy Wiz . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 VRF / COOLING C 54 Variable Refrigerant Flow: Refrigera H Where, Why, and How What was a primarily residential technology is ready for larger tech commercial settings. What was primari embraced overseas is primarily building momentum in the U.S. This update tra VRF progress, examtraces ines some strengths and weaknesses, and spans the globe in an effort sp to compile some cost comparisons with other alternatives. — by Ammi Amarnath and Morton Blatt G 24 4 HVAC Challenge. . . . . . . . . . . . . . . . . . . . . . . . .12 HVACR Designer Tips . . . . . . . . . . . . . . . . . . . .26 Issues & Events . . . . . . . . . . . . . . . . . . . . . . . . 64 Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66 Tomorrow’s Engineer . . . . . . . . . . . . . . . . . . . . . 74 GREEN INTELLIGENT BUILDINGS BUI PROACTIVE WITH YOUR PROFILE WIT As energy drives syst design everywhere, how are even up-to-speed system owners funding furth improvements? further — by Jack Mc Gowan, CEM En gi neer ed Sy stem s February 2008
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