Energy Efficiency Analysis on Free Cooling Operation Mode of the Water-Side Economizer System in Data Center

Yu-Jin Kim; Ju-Wan Ha; Wan-Uk Im; Hwan-Yong Kim; Young-Hak Song

doi:10.22696/jkiaebs.20220001

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2022 Vol.16, Issue 1 Next Page

Research Article

Energy Efficiency Analysis on Free Cooling Operation Mode of the Water-Side Economizer System in Data Center 데이터센터의 Water-Side Economizer 시스템 Free Cooling 운전 모드에 따른 에너지 효율 검토

28 February 2022. pp. 1-13

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Abstract

Water-side economizer (WSE) systems are being introduced to reduce cooling energy in data centers, but quantitative comparisons of various controls are impossible as the configurations of the systems are different. Therefore, this study reviewed the energy consumption according to the free cooling operation mode of the WSE system, and analyzed the operation status according to the South Korea climate zone to reduce additional energy and secure free cooling operation time. In the case of a WSE system that can only operate full-free cooling, about 10.9% of energy was saved. When full and partial-free cooling operations were implemented through th serial connection between the chiller and the heat exchanger, 13.7% of energy was saved. In particular, Daegwallyeong (6A), located in the climate zone with the lowest ambient air humidity temperature, Showed the highest energy savings of about 19.5% compared to the center chilled water system as free cooling operating time was secured the most.

Keywords

Data center

Water-side economizer

Free cooling

Climate zone

Energy consumption

키워드

데이터센터

외기냉수냉방

프리쿨링

기후존

에너지 사용량

References

Cho, J.K., Kim, Y.D. (2016). Improving energy efficiency of dedicated cooling system and its contribution towards meeting an energy-optimized data center. Applied Energy, 165, 697-982. 10.1016/j.apenergy.2015.12.099

Ham, S.W., Jung, J.W. (2016). Impact of aisle containment on energy performance of a data center when using an integrated water-side economizer. Applied thermal Engineering, 105, 372-384. 10.1016/j.applthermaleng.2015.05.069

Li, J., Li, Z. (2020). Model-based optimization of free cooling switchover temperature and cooling tower approach temperature for data center coolig system with water-side economizer. Energy and Buildings, 227, 110407. 10.1016/j.enbuild.2020.110407

Nall, D.H. (2014). Waterside Economizers & 90.1. ASHRAE Jornal, 56(8), 46-52.

Song, M.H. (2020). Trends and prospects of domestic data centers. Journal of Korean Association of Air Conditioning Refrigerating and Sanitary Engineers, 37(10), 28-38.

Stein, J. (2009). Waterside Economizing in Data Centers: Design and control Considerations. ASHRAE Journal, 115, 192-200.

Sun, K., Luo, N., Lou, X., Hong, T. (2020). Prototype Energy models for Data Centers. Energy and Buildings, 231, 110603. 10.1016/j.enbuild.2020.110603

Taylor, S.T. (2014). How to Design & Control Waterside Economizers. ASHRAE Jornal, 56(6), 30-36. 10.1162/DESI_a_00247

Udagawa, Y., Waragai, S., Yanagi, M., Fukumisu, W. (2010). Study on free Cooling system for Data Center in Japan. IEEE Conference June 2010. 10.1109/INTLEC.2010.5525676

ASHRAE. (2019). ASHRAE Handbook Heating, Ventilating, and Air-conditioning Applications.

Department of Energy (DOE). (2021). EnergyPlus Input Output reference, Version 9.5, 2021.

Passive House Institute Korea (PHIKO). (2017). http://climate.onebuilding.org/, Passive House Institute Korea.

Information

Publisher :Korean Institute of Architectural Sustainable Environment and Building Systems
Publisher(Ko) :한국건축친환경설비학회
Journal Title :Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
Journal Title(Ko) :한국건축친환경설비학회논문집
Volume : 16
No :1
Pages :1-13
Received Date : 2021-11-28
Revised Date : 2022-01-28
Accepted Date : 2022-01-28
DOI :https://doi.org/10.22696/jkiaebs.20220001

Journal of Korean Institute of Architectural Sustainable Environment and Building Systems ISSN:1976-6483(Print) 2586-0666(Online) 한국건축친환경설비학회논문집

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