Instability issues in the server room cooling system

• Autorzy: Kwiatkowski T. , Prusiński P. , Zgorzelski D. , Kozioł S
• Języki publikacji: EN

Abstrakty

EN

Since 2009, the National Center for Nuclear Research in Poland has been constructing its own High Performance Computing (HPC) Centre under the name Świerk Computing Centre (CIŚ). Now, it is ready reaching its target - 1 PFLOPS - in December 2015. However at the early operation stage, one of its major problems was the unstable work of the HPC cluster cooling system, resulting in increased maintenance costs. The main aim of this work is to thoroughly investigate the origin of the problem and to find the best solution for it based on results from a Computational Fluid Dynamics (CFD) analysis. The constructors suspected that the oscillations in the flow domain are caused by thermal flow stratification, but something else was proved. In this paper, a wide range of cases will be analyzed, covering different work regimes of the installation as well as various geometry modifications. Finally, certain improvement to the current design will be suggested by the CFD Analysis Group.

Słowa kluczowe

EN

HPC; High Performance Computing; computer cluster; cooling; CFD; Computational Fluid Dynamics

PL

superkomputer; klaster komputerowy; chłodzenie; obliczeniowa mechanika płynów

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2017
• Tom: Vol. 97, nr 3
• Strony: 252--258
• Opis fizyczny: Bibliogr. 5 poz., rys., tab., wykr.

Twórcy

autor

Kwiatkowski T.

• National Centre for Nuclear Research, A. Sołtana 7, 05-400 Otwock-Świerk, Poland

autor

Prusiński P.

• National Centre for Nuclear Research, A. Sołtana 7, 05-400 Otwock-Świerk, Poland

autor

Zgorzelski D.

• National Centre for Nuclear Research, A. Sołtana 7, 05-400 Otwock-Świerk, Poland

autor

Kozioł S

• National Centre for Nuclear Research, A. Sołtana 7, 05-400 Otwock-Świerk, Poland

Bibliografia

• [1] D. Zgorzelski, P. Prusinski, T. Kwiatkowski, S. Koziol, Hydraulic divider geometry optimization with the use of cfd analysis tools, Tech. rep., National Centre for Nuclear Research, report NCBJ CIŚ Nr B–2/2015 (2015).
• [2] D. Causon, D. Ingram, C. Mingham, A cartesian cut cell method for shallow water flows with moving boundaries, Advances in Water Resources 24 (8) (2001) 899–911. doi:http://dx.doi.org/10.1016/S0309-1708(01)00010-0.
• [3] R. Kaczmarek, It’s all about the mesh – a cartesian cut-cell approach (2013). URL http://bit.ly/2fUOFPB
• [4] W. Rahimi, H. nad Medjroubi, P. J., 2d and 3d numerical investigation of the laminar and turbulent flow over different airfoils using openfoam (2013). URL www.forwind.de/sowe/Site/Programfiles/SOWE2013Rahimi.pdf
• [5] D. K. Walters, D. Cokljat, A three-equation eddy-viscosity model for reynolds-averaged navier–stokes simulations of transitional flow, Journal of Fluids Engineering 130(20) (2008) 14. doi:10.1115/1.2979230.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).