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Higher-Efficiency Redundancy Strategy for Data Center Cooling

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©2024 This excerpt taken from the article of the same name which appeared in ASHRAE Journal, vol. 66, no. 2, February 2024. 

About the Author
Jinkyun Cho, Ph.D., is a professor in the department of Building and Plant Engineering at Hanbat National University in Deajeon, South Korea. Jinyoung Lee, P.E., is a principal in mechanical engineering at HIMEC in Seoul, South Korea.

Cooling systems in data centers must balance the need to significantly reduce energy consumption with maintaining the optimal environment for IT equipment to operate without errors or interruptions. Unfortunately, a trade-off often exists between these two objectives—increasing the equipment reliability of data center operations tends to increase energy consumption, while relaxing the cooling system configuration and operating conditions to save energy may compromise equipment reliability. Therefore, achieving the goal of reducing energy consumption while maintaining data center reliability is a challenging task.

This article discusses an energy-saving approach to hot-standby sparing (HSP) operation and control of cooling system redundancy equipment, which is crucial for ensuring the operational reliability of data centers. It also presents a design case and quantifies the energy savings for data center cooling achieved using this approach.

Data centers are classified to evaluate their reliability and stability. The two common data center infrastructure standards specify the items that define all the elements that must be equipped in the data center, and major data centers use reliability and stability as a reference point.

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