Instability issues in the server room cooling system

  • Tomasz Kwiatkowski National Centre For Nuclear Research
  • Piotr Prusinski National Centre for Nuclear Research
  • Dariusz Zgorzelski National Centre for Nuclear Research
  • Sylwester Kozioł National Centre for Nuclear Research

Abstract

Since 2009, the National Center for Nuclear Research in Poland has been constructing its own High Performance Computing(HPC) Centre under the name S´wierk Computing Centre (CIS´ ). Now, it is ready reaching its target—1 PFLOPS—in December2015. However at the early operation stage, one of its major problems was the unstable work of the HPC cluster coolingsystem, resulting in increased maintenance costs. The main aim of this work is to thoroughly investigate the origin of theproblem and to find the best solution for it based on results from a Computational Fluid Dynamics (CFD) analysis. Theconstructors suspected that the oscillations in the flow domain are caused by thermal flow stratification, but something elsewas proved. In this paper, a wide range of cases will be analyzed, covering different work regimes of the installation as wellas various geometry modifications. Finally, certain improvement to the current design will be suggested by the CFD AnalysisGroup.

References

[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 CI´S 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.
Published
2017-11-01
How to Cite
KWIATKOWSKI, Tomasz et al. Instability issues in the server room cooling system. Journal of Power Technologies, [S.l.], v. 97, n. 3, p. 252-258, nov. 2017. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/677>. Date accessed: 05 aug. 2021.
Section
Energy Conversion and Storage

Keywords

HPC, computer cluster, efficient cooling, CFD

Most read articles by the same author(s)

Obs.: This plugin requires at least one statistics/report plugin to be enabled. If your statistics plugins provide more than one metric then please also select a main metric on the admin's site settings page and/or on the journal manager's settings pages.