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CRAC vs. CRAH

By Green Data Center Man | Feb 06, 2017

I had this come up recently… what is a CRAC (pronounced ‘crack’)?  What is different from it than a CRAH (pronounced ‘craw’ or ‘cray’)? CRAC = Computer Room Air Conditioner A CRAC is often thought of as having an internal compressor, thus not needing the support of a centralized chilled water system.  But this also […]
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Warmer Chilled Water on Existing Systems

By Green Data Center Man | Oct 06, 2016

So we are looking to save energy, and one of those ways is increasing the chilled water temperature.  But how does that save anything?  Increasing the chilled water temperature brings it closer to the condenser water temperature and thereby reduces the amount of work (lift) a chiller has to perform.  Since the chiller usually has […]
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