Experimental and Theoretical Study of Surge Behavior in a Boil-Off Gas Centrifugal Compressor on an LNG Carrier

Jinkwang Lee, Yujin Cheon and Younseok Choi
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Jinkwang Lee: Department of Naval Architecture and Offshore Engineering, Dong-A University, 37 Nakdong-daero 550 Beon-gil, Saha-gu, Busan 49315, Korea
Yujin Cheon: Department of Chemical Science and Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Korea
Younseok Choi: Department of Aerospace Engineering, Republic of Korea Air Force Academy, 635 Danjae-ro, Sangdang-gu, Cheongju 28187, Korea

Energies, 2022, vol. 15, issue 11, 1-15

Abstract: In this study, we conducted experiments and numerical analysis on a 270 kW industrial-scale centrifugal compressor used in the fuel supply system of an LNG carrier in order to improve the lumped-parameter surge model by considering the viscosity in the pipeline and to confirm whether the improved model would be applicable. The steady and unsteady compressor performance curves were constructed using measurements and predictions, respectively. The flow through the pipeline was assumed to be both steady and unsteady, and each governing equation under the assumptions was derived in accordance with the lumped-parameter model. In the steady flow case, the surge behavior of the modified model was in a good agreement with the lumped-parameter model at surge parameter B = 4.8716. In the unsteady flow case, however, the modified model showed a deviation from the lumped-parameter model, and the simulation from the modified model described the surge behavior 5% more accurately than the lumped-parameter model. Through experiments and numerical analysis, this study showed that the present models are useful and applicable for describing the surge behavior of an industrial-scale single-stage centrifugal compressor.

Keywords: surge; industrial-scale centrifugal compressor; lumped-parameter model; Greitzer model (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: 2022
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