Economic Justification of Magnetic Bearings and Mechanical Dry Seals for Centrifugal Compressors PUBLIC ACCESS

[+] Author Affiliations
S. O. Uptigrove, T. A. Harris, D. O. Holzner

NOVA, An Alberta Corporation

Paper No. 87-GT-174, pp. V003T07A006; 8 pages
  • ASME 1987 International Gas Turbine Conference and Exhibition
  • Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Anaheim, California, USA, May 31–June 4, 1987
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7925-2
  • Copyright © 1987 by ASME


The method for calculating the economic justification related to the use of active magnetic bearings and mechanical dry seals in centrifugal compressors is presented. This evaluation is based on the initial purchase price, and the associated operational and maintenance savings over standard oil bearings and oil seal systems. The economic evaluation is presented for both the retrofit of existing equipment and for the installation into new equipment. Although the economics are shown for centrifugal compressors, the same basic philosophy can be used to evaluate the economic justification of magnetic bearings for any type of rotating machinery.

Different areas of potential cost savings are discussed, including a method of calculating the associated savings. In addition, an example calculation for a specific compressor is presented. It must be emphasized that the economic benefits and the associated costs are highly dependent on the type and size of compressor as well as the particular application.

Copyright © 1987 by ASME
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