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Performance Characteristics of a 4 × 6 Oil-Free Twin-Screw Compressor

Author

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  • Sun-Seok Byeon

    (Graduate School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea)

  • Jae-Young Lee

    (YUJIN Machinery Ltd, Ansan 15433, Korea)

  • Youn-Jea Kim

    (School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea)

Abstract

The screw compressor in the early stage of development is generally known as the oil-injection type. However, escalating environmental problems and advances in electronic components have spurred continuous R & D to minimize the oil content in compressed air. The oil-free twin-screw compressor is continuously compressed by inner volumetric change between rotors and casing. For this reason, in order to predict the overall performance of the screw compressor at the early stage of the design process, industry still relies on the empirical method. However, it is difficult using the existing empirical method to gain more information of the inner fluid flow of the twin-screw compressor. Flow simulation techniques using CFD are required. This study presents applications of a recently proposed overset grid method to the solution of the flow around a moving boundary. In order to analyze the performance of a 4 × 6 oil-free screw compressor, the 3-D, unsteady and compressible flow fields were numerically calculated with a shear stress transport (SST) turbulence model, and implemented by the commercial software, Star-CCM+. The pressure distributions were calculated and graphically depicted. Results also showed that the volumetric and adiabatic efficiencies of the screw compressor measured by the experiments were 78% and 71%, respectively.

Suggested Citation

  • Sun-Seok Byeon & Jae-Young Lee & Youn-Jea Kim, 2017. "Performance Characteristics of a 4 × 6 Oil-Free Twin-Screw Compressor," Energies, MDPI, Open Access Journal, vol. 10(7), pages 1-16, July.
  • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:945-:d:104015
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    References listed on IDEAS

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    1. Li, Yuwei & Paik, Kwang-Jun & Xing, Tao & Carrica, Pablo M., 2012. "Dynamic overset CFD simulations of wind turbine aerodynamics," Renewable Energy, Elsevier, vol. 37(1), pages 285-298.
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    Cited by:

    1. Zhilong He & Tao Wang & Xiaolin Wang & Xueyuan Peng & Ziwen Xing, 2018. "Experimental Investigation into the Effect of Oil Injection on the Performance of a Variable Speed Twin-Screw Compressor," Energies, MDPI, Open Access Journal, vol. 11(6), pages 1-14, May.

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