Engineered Systems - March 2008 - (Page 40)

Exemplary Success Long Lasting Won’t Rust or Corrode Avoid Down Tme Save on Maintenance 15-Year Shell Warranty Not Harmed by H2O Chemical Treatments The Greatest Thing Since a Delta Cooling Tower. Delta Cooling Towers designed the first engineered plastic (polyethylene) cooling tower in 1971. Since then we’ve improved and expanded “The Most Durable Corrosion-Proof Cooling Towers Available” to a full line, factory assembled and ready for any application. Visit us at www.deltacooling.com, or call 1.800.289.3358. The The temperature control sys em is p t t l syst is electronic, with com electronic with a communications ectronic ommunication icatio link to the scho distri link to the school district central hool istrict ntral t facilities hub Control programmi facilities hub. Control programming ii ub. ntro ogra ing sequences designed to get the sequences designed to get the q s most benefit from the right-sized t benefit fro the right-sized f rom g size system capacities include staging air-handling systems on in a defined sequence. For example, the kindergarten rooms may require earlier morning warm-up than the gymnasium, to accommodate small children seated on the floor. entry heating. Coil pumps were included in the design to maximize coil heat transfer and minimize coil discharge air stratification. The cooled water system consists of an open cooling tower with variable-speed fan, a below-grade cooling tower water sump, a ESM03084DeltaCool.indd 1 2/19/08 1:46:04 PM vertical turbine-type cooling tower loop pump, a plate-and-frame heat exchanger, a base-mounted building cooling water distribution pump, and distribution piping arranged in a reverse-return configuration to the AHU-cooled water coils. AHU coils were selected with a The experts in stainless minimum of six rows, and 12 fins-per-in., providing a maximum 3° approach between supply water and leaving air temperatures. steel clean air systems The temperature control system is electronic, with a commufor food processing, nications link to the school district central facilities hub. Control programming sequences designed to manage the hydronic system plus: operation and to get the most benefit from the right-sized system • Custom fabrication capacities include the following. • Rush deliveries • An aggressive heating water temperature reset schedule, to maximize boiler efficiency; A-J Manufacturing offers a complete line of custom • A morning warm-up sequence to direct heating capacity toward and standard stainless steel air distribution products, all warming the building mass prior to occupancy; designed and manufactured to offer durable, dependable • Staging air-handling systems on in a defined sequence so as to manand low maintenance performance necessary for food age morning warm-up. For example, the kindergarten rooms may processing and manufacturing facilities. require earlier morning warm-up than the gymnasium, to accommodate small children seated on the floor. What’s more, with our state-of-the-art manufacturing FREE INFO: 39 When it has to be stainless, it has to be A-J! capabilities, we can also offer you the industry’s shortest lead times for custom orders. So for continuous linear, security grilles, modular diffusers and much more, contact A-J Manufacturing today! A-J Manufacturing 800-247-5746 • www.ajmfg.com FREE INFO: 13 Boiler capacity is 1,600 MBtuh input, or approximately 25.4 Btuh/sq ft. Construction from the 1980s and 1990s would require a boiler input of approximately 40 Btuh/sq ft for similar occupancy in a similar locale. Cooling tower heat rejection is 66 tons, or approximately 950 sq ft/ton. Conventional school construction in this area typically sees chilled water system capacities of 450 to 500 sq ft/ton. 40 En gi neer ed S y stem s March 2008 12/13/07 2:38:11 PM ES03084AJWasteFood.indd 1 http://www.deltacooling.com http://www.deltacooling.com http://www.ajmfg.com

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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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