Evans is an engineer with APC in West Kingston, RI. He has 14 years of experience in power and cooling system design and is a member of ASHRAE Technical Committee 9.9 (Mission Critical Facilities, Technology Spaces, & Electronic Equipment).
Controlling humidity in IT environments is essential to achieving high availability. This article explains how humidity affects equipment, and why humidity control is required. The author offers quantitative design guidelines for existing and new computing installations, and he also explains the hidden costs associ-ated with over-humidification.
Retrieving every last bit of performance from the system while stopping short of the surge line is no small feat. Dig into sizing, tower selection, chilled water loads and stability, and condenser water management to leave no efficiency stone unturned. Read more in April issue