Medical Data Center Controls Uptime, Energy With Variable-Frequency Drives: Cut energy use 40% by controlling CRAC fan speed

摘要

At a medical data center in the upper Midwest, cooling-system uptime reliability is ensured with redundant computer-room air-conditioning (CRAC) units. For example, in a room needing eight units, 10 are employed. "Under normal conditions, we're using 80 percent of the installed capacity to cool the room, which is about a 30-percent turndown," the data-center manager said.