Engineered Systems - March 2008 - (Page 4)

c 44 52 contents FEATURES Desi 36 Exemplary Design = Elementary Suc Success Integration has been the buzzword for th Colorado district, even this going back to the way funding was obtained. From a hydronics system designed with simplicity and smart sequencin in mind to right-sizing sequencing throughout the project, engineers made this school a study in simultanesc ously pursuing first-cost and long-term performance success. first cost long term perform March 2008 COVER STORY 36 — by Barry J. Stamp, P.E., LEED® AP CLASSROOM VENTILATION CLASSROOM VENT The Modern Unit Ventilator Uni 52 In which the authors take out the original unit designed specifically for K-12 and see how thin have changed in the things decades since it first went to school. Time and technology have solved some problems, yet an old-fashioned issue like ease of maintenance l can still pose headaches (or backaches). All i all, this update about a in well-known design option deserves a permanent spot in your threewell known perma ring reference binder. — by Tom Durkin, P.E. and Brian Partington, P.Eng. CHILLERS / RET RETROFITS On A Mission To maintain performance for the gu guests who check in, this historical landmark had to arrange for its chiller plant to check out — not just entailing a retrofit, but including a shift in location away from s the traditional hotel grounds. See how the new plant and its controls ne have boosted efficiency, and why the move also helped the hotel stop a blowing fuses at special events. DEPARTMENTS Advertiser Index . . . . . . . . . . . . . . . . . . . . . . . . .73 Application Checklist . . . . . . . . . . . . . . . . . . . . .34 Back2Basics. . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Building Automation. . . . . . . . . . . . . . . . . . . . . .28 Case In Point . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Classifieds . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . .26 Editor’s Note. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Energy Wiz . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69 HVAC Challenge. . . . . . . . . . . . . . . . . . . . . . . . .12 HVACR Designer Tips . . . . . . . . . . . . . . . . . . . .32 Issues & Events . . . . . . . . . . . . . . . . . . . . . . . . 66 Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68 Tomorrow’s Engineer . . . . . . . . . . . . . . . . . . . . . 74 — by Charles Fletcher VAV / GREEN DESIGN 60 VAV Systems And Green An Design – Part II In the conclusion of this pair of articles, the author delivers opinion and documentation with equal force. M Making the argument that traditional VAV is too troublesome regarding meeting ASHRAE 62.1 and m 90.1, he also explains how those same standards are pushing designstand ers in the right direction. The destination? A new era for VAV and new i th i ht di ti Th d ti ti ? efficiencies for their applications — but shining a little light down this path reveals just how fraught with peril the designer’s journey can be. — by Mark S. Lentz, P.E. 4 En gi neer ed Sy stem s March 2008

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Engineered Systems - March 2008 Contents Editor’s Note Back2Basics HVAC Challenge Case In Point Commissioning Building Automation Energy Wiz HVACR Designer Tips Application Checklist Exemplary Design = Elementary Success The Modern Unit Ventilator On A Mission VAV Systems And Green Design – Part II Issues & Events Products Glossary Classifieds Advertiser Index Tomorrow’s Engineer

Engineered Systems - March 2008

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