Engineered Systems - August 2008 - (Page 32)

GLASS BOX TO GRAND CASINO downstream of the cooling coil for all of the interior fancoil units, but it hasn’t been needed yet. We achieved this at no extra cost; the simple rearrangement of the coils allows us to first dehumidify with the cooling coil if we need to, and then reheat the air if warm air is required. One challenge did arise within the first year of operation: during the winter, the high heat losses at the entryway due to constantly opening doors were difficult to handle by blowing warm air in the façade and with the displacement system delivering air just below room temperature. To solve this problem, the entryway was redesigned with a welcoming vestibule, with offset interior and exterior doors to keep the warm interior air from rushing out and the cold exterior air from rushing in. This entryway challenge requires careful consideration in any climate, hot or cold. CONCLUSIONS Since completion and amendment of the entry vestibule in 2005, the double façade and displacement cooling system have been a huge success. Although a temporary project, the building has become a key example of displacement cooling, especially for the niche casino market. At the time of completion, this building was the largest application of displacement cooling in North America. Casino owners from Las Vegas have toured the facility to examine the displacement ventilation system and explore the possibilities it offers for smoking environments. Smoke would simply rise up with the stratified air and get exhausted to the outside without ever mixing with the low-level supply air. This would be a practical, low-cost, energy-efficient alternative to the traditional “muscle” approach of high exhaust volume, which is energy-intensive and creates uncomfortable drafts. The project was a learning experience for all involved, and a great opportunity to apply integrated design and modern engineering solutions tied to the oldest laws of physics. ES Ms. Hayes joined Cobalt Engineering in June 2005 after completing her engineering degree at Queen’s University in Kingston. As a sustainable designer, her practice includes sustainable building systems design and thermal modeling. E-mail her at shayes@cobaltengineering.com. Mr. Newbert is a founding partner of Cobalt Engineering. He designed the first C2000 project in Western Canada (pre-LEED) and one of the first 100% naturally ventilated office buildings in Canada. As technical director and mentor of Cobalt’s emerging engineers, he draws on over 25 years of diverse industry experience. E-mail him at knewbert@cobaltengineering.com. For more information, visit www.cobaltengineering.com. Input 183 at www.esmagazine.com/instantproductinfo ESM08084Emon.indd 1 ed S y stem s August 2008 32 En gi neer 7/18/08 10:36:21 AM http://www.cobaltengineering.com http://www.emon.com/es8.asp http://www.emon.com/es8.asp http://www.esmagazine.com/instantproductinfo

Table of Contents Feed for the Digital Edition of Engineered Systems - August 2008

Engineered Systems - August 2008 Contents Editor's Note Back2Basics HVAC Challenge Case In Point Commissioning Building Automation Efficiency Incentives HVACR Designer Tips Glass Box to Grand Casino Looking Radiant In Green Mechanical Products Sourcebook Q&A: Dehumidification In Schools Building Oversight Management: M&V And More Products Classifieds Advertiser Index Tomorrow's Environment

Engineered Systems - August 2008

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