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A New Optimization Method for Centrifugal Compressors Based on 1D Calculations and Analyses

Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
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Academic Editor: Terese Løvås
Energies 2015, 8(5), 4317-4334; https://doi.org/10.3390/en8054317
Received: 24 February 2015 / Revised: 30 March 2015 / Accepted: 15 April 2015 / Published: 12 May 2015
This paper presents an optimization design method for centrifugal compressors based on one-dimensional calculations and analyses. It consists of two parts: (1) centrifugal compressor geometry optimization based on one-dimensional calculations and (2) matching optimization of the vaned diffuser with an impeller based on the required throat area. A low pressure stage centrifugal compressor in a MW level gas turbine is optimized by this method. One-dimensional calculation results show that D3/D2 is too large in the original design, resulting in the low efficiency of the entire stage. Based on the one-dimensional optimization results, the geometry of the diffuser has been redesigned. The outlet diameter of the vaneless diffuser has been reduced, and the original single stage diffuser has been replaced by a tandem vaned diffuser. After optimization, the entire stage pressure ratio is increased by approximately 4%, and the efficiency is increased by approximately 2%. View Full-Text
Keywords: centrifugal compressor; 1D calculations; optimization centrifugal compressor; 1D calculations; optimization
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Li, P.-Y.; Gu, C.-W.; Song, Y. A New Optimization Method for Centrifugal Compressors Based on 1D Calculations and Analyses. Energies 2015, 8, 4317-4334.

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