Ashrae 90.4 Pdf -

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Evaluates the efficiency of the power distribution chain, accounting for losses from the utility handoff to the IT equipment racks. ashrae 90.4 pdf

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ASHRAE Standard 90.4 provides specialized, performance-based energy efficiency requirements for data centers, utilizing Mechanical Load Component (MLC) and Electrical Loss Component (ELC) metrics. This standard allows for design flexibility, such as trading off efficiency between systems, and offers requirements tailored to specific climate zones. For more details, visit ASHRAE Releases Revised Version of Data Center Standard The screen flickered

The primary objectives of ASHRAE 90.4 are:

This limits electrical losses from power distribution gear:

This is the heart of the standard. The MLC limits the total mechanical system power (fans, pumps, chillers, compressors) relative to the Critical IT Load (CITL). The formula is simplified as: