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

Pei-Yuan Li, Chu-Wei Gu and Yin Song
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Pei-Yuan Li: Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
Chu-Wei Gu: Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
Yin Song: Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

Energies, 2015, vol. 8, issue 5, 1-18

Abstract: 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 The outlet diameter of the vaneless diffuser has been reduced, and the original single stage diffuser has been replaced by a tandem vaned diffuser.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%.

Keywords: centrifugal compressor; 1D calculations; optimization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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