Highly Efficient Data Center Cooling Using Multiple Chiller System with Oil-Free Variable-Speed Turbo Compressors

  • Oil-free twin-turbo centrifugal compressor uses electromagnetic bearings and turbine variable-speed for significant increase of energy efficiency at partial load compared to conventional oil-lubricated centrifugal or screw compressors. Each of the three water chillers installed in Telecommunication Data Center “Belgrade” in April 2008 has two turbo compressors and total cooling capacity of 1.97 MW. Such design solution with oil-free compressors was applied for the first time in Serbia as well as in the territory of ex-Yugoslavia. It has been estimated that in the 2008 cooling season this solution achieved more than 35% energy savings comparing to the previous solution with conventional centrifugal compressors. This paper presents the results of preliminary measurement of the working characteristics of chillers and energy efficiency ratio for real working conditions.
  • Keywords
    turbocor compressor, oil-free centrifugal compressor, energy efficiency
  • Pages
    95 - 108
  • Submitted
  • Revised
  • Accepted
    0350-218X, 38 (2012), 2, 95-108
  • References
    • Pejković, S., Živanović, V., Određivanje, klasifikovanje i označavanje energetske efikasnosti agregata za hlađenje vode i toplotnih pumpi, 39. Međunarodni kongres o grejanju, hlađenju i klimatizaciji, 2008, Beograd
    • Danfoss Turbocor, USCO 7.2008
    • Water Cooled Liquid Chiller SerieTECS-HF / TECS-HFD, Cod: B100AS_120_220B_CV_06_06_IT_GB, CLIMAVENETA
    • http://www.turbocor.com
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