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Study on gas wave ejector with a novel wave rotor applied in natural gas extraction

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  • Zhao, Yiming
  • Hu, Dapeng
  • Yu, Yang
  • Li, Haoran

Abstract

A gas wave ejector (GWE) is an efficient energy conversion technology. This study innovatively proposes a new type of curved diverging channel (Sp-ch channel) and performs a relevant comparative fluid and thermodynamic analysis. The flow losses of the incident high-pressure gas and the medium-pressure gas in the pressure port can be significantly reduced by the bending angles of the Sp-ch channel. The structure of the Sp-ch channel allows the medium-pressure gas to complete a certain degree of dynamic-static pressure conversion in the channels, improving the static pressure ratio of the gas discharged from the rotor. Compared to the traditional rotor, the Sp-ch rotor exhibits a minimum increase of 57% in ejection rate and 5% in efficiency under the comparative conditions in this study. This study established a GWE testing platform in a coalbed methane well site and conducted its first application test, which preliminarily shows the application advantages of a GWE. Under the testing conditions in this study, the maximum ejection rate of GWE reaches to 35.1%, allowing for a maximum recovery production of approximately 8832 Nm3/d from the discontinued low-pressure wells. Moreover, except for overcoming mechanical friction, the GWE operates with almost no power consumption.

Suggested Citation

  • Zhao, Yiming & Hu, Dapeng & Yu, Yang & Li, Haoran, 2023. "Study on gas wave ejector with a novel wave rotor applied in natural gas extraction," Energy, Elsevier, vol. 277(C).
    • Handle: RePEc:eee:energy:v:277:y:2023:i:c:s0360544223010757
    DOI: 10.1016/j.energy.2023.127681
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    References listed on IDEAS

    as
    1. Hong, Bingyuan & Li, Xiaoping & Li, Yu & Chen, Shilin & Tan, Yao & Fan, Di & Song, Shangfei & Zhu, Baikang & Gong, Jing, 2022. "An improved hydraulic model of gathering pipeline network integrating pressure-exchange ejector," Energy, Elsevier, vol. 260(C).
    2. Tang, Yongzhi & Liu, Zhongliang & Li, Yanxia & Huang, Zhifeng & Chua, Kian Jon, 2021. "Study on fundamental link between mixing efficiency and entrainment performance of a steam ejector," Energy, Elsevier, vol. 215(PB).
    3. Lei, Y. & Zhou, D.S. & Zhang, H.G., 2010. "Investigation on performance of a compression-ignition engine with pressure-wave supercharger," Energy, Elsevier, vol. 35(1), pages 85-93.
    4. Tüchler, Stefan & Copeland, Colin D., 2020. "Experimental and numerical assessment of an optimised, non-axial wave rotor turbine," Applied Energy, Elsevier, vol. 268(C).
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