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Air-conditioning water chiller with variable speed and totally oil-free compressors.

Author(s) : MINEA V.

Summary

The energy performances of a 440-kW air-conditioning factory-assembled water chiller with two totally oil-free, variable-speed compressors are presented. The new water chiller has been designed for an institutional HVAC system with mostly process air-conditioning charges. Several thermodynamic and electrical parameters allowed calculating the non-standard part-load values for summer operation in a cold climate. The results prove that variable-speed compressors with magnetic bearings and digital electronic controls for air-cooled water chillers achieve high energy efficiencies. Compared to the replaced 25-years old water chiller, the part-load efficiency has been improved by 49%, while ensuring similar indoor thermal conditions for process equipment and occupants, and generating less noise.

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Pages: ICR07-B2-192

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Details

  • Original title: Air-conditioning water chiller with variable speed and totally oil-free compressors.
  • Record ID : 2007-2230
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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