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Seeking a high seasonal energy index: the use of oil-free centrifugal compressors with suspended magnetic bearings in air-cooled chillers.

Gruppi frigoriferi con elevato indice energetico stagionale: l'utilizzo dei compressori centrifughi privi di olio lubrificante a sospensione magnetica nei refrigeratori condensati ad aria.

Author(s) : VIO M.

Summary

The paper examines the energy benefits obtained using a new generation of oil-free centrifugal compressors with magnetic bearings levitate, controlled by an inverter. Thanks to the innovative technology of the magnetic bearing levitation, the impeller can work at an extremely high speed (higher than 40 000 rpm). The size, the weight of the compressor and the material wear are reduced. The system is totally oil-free. The seasonal energy efficiency (measured by the IPLV and EMPE indexes) is high thanks to the absence of the oil in the circuit and to cooling capacity control based on the reduction of the impeller rotation, obtained with an inverter.

Details

  • Original title: Gruppi frigoriferi con elevato indice energetico stagionale: l'utilizzo dei compressori centrifughi privi di olio lubrificante a sospensione magnetica nei refrigeratori condensati ad aria.
  • Record ID : 2009-1350
  • Languages: Italian
  • Source: Impianti, edifici, città: integrazione e nuove visioni di progetto e di gestione. 44e Convegno Internazionale AICARR [CD-ROM]./ HVAC&R systems, envelope and urban context: integration and new vision of design and operation. 44th International conference of AICARR [CD-ROM].
  • Publication date: 2004/03/03

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