Hot Aisle/Cold Aisle Containment Issues Presented March 1, 2011
Posted by shawnpci in Fire Protection, Fire Systems, FSSA.Tags: clean agent, clean agents, fire, fire protection, fire suppression, Fire Systems, FSSA, hot aisle cold aisle, NFPA
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Example of HACS/CACS solution
Challenges created by hot aisle/cold aisle containment systems (HACS/CACS) to effective fire suppression system design were presented at FSSA’s Framing for Success Annual Meeting by Jeffery Kidd of New England Fire Systems.
Kidd presented the variety of HACS/CACS solutions that are being implemented in data centers to deal with increasing heat loads. He cited recent studies that showed average data center operating temperatures rising from an average of 72 degrees before 2004 to 81 degrees in 2008. He also noted that it’s not uncommon for hot aisle temperatures to reach well over 100 degrees.
Proposals are currently being presented to the technical committees of NFPA 75 and NFPA 76 to recognize the challenges posed to fire suppression systems by these HACS/CACS efforts.
Kidd noted several items to consider when designing or modifying a fire suppression system where HACS/CACS systems are used including: detection for high air flows; agent design considerations for higher ambient temperatures and obstacle interference for nozzle placement.
FSSA’s annual meeting concludes on March 1.
Onward and Upward 
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