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Impact of Fan Airflow of IT Equipment on Thermal Environment and Energy Consumption of a Data Center

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Title: Impact of Fan Airflow of IT Equipment on Thermal Environment and Energy Consumption of a Data Center
Authors: Futawatari, Naoki Browse this author
Udagawa, Yosuke Browse this author
Mori, Taro Browse this author
Hayama, Hirofumi Browse this author
Keywords: data center
thermal management
ITE fan speed
energy consumption
Issue Date: 24-Nov-2020
Publisher: MDPI
Journal Title: Energies
Volume: 13
Issue: 23
Start Page: 6166
Publisher DOI: 10.3390/en13236166
Abstract: Energy-saving in regard to heating, ventilation, and air-conditioning (HVAC) in data centers is strongly required. Therefore, to improve the operating efficiency of the cooling equipment and extend the usage time of the economizer used for cooling information-technology equipment (ITE) in a data center, it is often the case that a high air-supply temperature within the range in which the ITE can be sufficiently cooled is selected. In the meantime, it is known that when the ambient temperature of the ITE rises, the speed of the built-in cooling fan increases. Acceleration of the built-in fan is thought to affect the cooling performance and energy consumption of the data center. Therefore, a method for predicting the temperature of a data center-which simply correlates supply-air temperature with ITE inlet temperature by utilizing existing indicators, such as air-segregation efficiency (ASE)-is proposed in this study. Moreover, a method for optimizing the total energy consumption of a data center is proposed. According to the prediction results obtained under the assumption of certain computer-room air-conditioning (CRAC) conditions, by lowering the ITE inlet temperature from 27 degrees C to 18 degrees C, the total energy consumption of the machine room is reduced by about 10%.
Rights: ©2020 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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