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Study on Effects of Operating Parameters on a Water-Cooled Loop Thermosyphon System under Partial Server Utilization by Sikai Zou; Chang Yue; Ting Xiao; Xingyi Ma; Yiwei Wang is a Environmental Science article available to read on EtoBox.

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During the operation of a data center, servers are gradually installed in racks, causing most racks to work under a low heating load for a long time and affecting the cooling efficiency of the loop thermosyphon system (LTS). Thus, the effects of operating parameters on the thermal performance should be investigated. In this study, a water-cooled LTS was experimentally investigated under different airflow rates and heating loads. The results show that the additional liquid refrigerant reduced the heat transfer performance and aggravated a drop in cooling capacity when the airflow rate and heating load were decreased. To further reveal the effects of the operating parameters on the thermal performance and cooling efficiency, a steady-state distributed-parameter model was developed and validated based on the experimental data. The results show that the excessive cooling capacity was reduced by decreasing the airflow rate according to the upper limit of the server exhaust air temperature under partial server utilization. The excessive cooling capacity was reduced by 14.5–52.1% under 5–56.5% server utilization. To further reduce the excessive cooling capacity while ensuring thermal secu

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Author

Sikai Zou; Chang Yue; Ting Xiao; Xingyi Ma; Yiwei Wang

Publisher

MDPI AG

Published

2023

Language

EN

Field

Environmental Science (Social Sciences)