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Preliminary Analysis of Compressor System Designed for Cyclical Operation

[+] Author Affiliations
Viktor Kilchyk, Ozhan H. Turgut, Ahmed Abdelwahab

Praxair, Inc., Tonawanda, NY

Paper No. POWER2015-49550, pp. V001T05A007; 7 pages
  • ASME 2015 Power Conference collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum
  • ASME 2015 Power Conference
  • San Diego, California, USA, June 28–July 2, 2015
  • Conference Sponsors: Power Division
  • ISBN: 978-0-7918-5660-4
  • Copyright © 2015 by ASME


Conventional methods of the compressor performance analysis do not allow effective design matching to the specific operating conditions of cyclical or unsteady operated machines. Under dynamic loading the actual compressor performance often departs from the best efficiency region reducing its cycle efficiency. This departure may be caused by a number of reasons such as non-controlled deceleration, speed or torque constraints, and rapid boundary conditions variation caused by the cycle operation. In order to analyze this influence of cycle dynamics on compressor performance a modified lumped-parameter compressor-system model was applied. The model included time-dependent boundary conditions, effects of flow compressibility, motor and compressor inertia, and was combined with compressor speed control. The study was performed within the system constrains, e.g. surge avoidance, maximum motor torque and impeller speed. Results of the developed analysis showed that in the presence of rapidly changing boundary conditions the average cycle efficiency is strongly affected by the design specific speed of the compressor.

Copyright © 2015 by ASME
Topics: Compressors



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