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Influence of clearance height on performance of water-lubricated single-screw air compressor

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  • Li, Yanan
  • Zhi, Ruiping
  • Wu, Yuting
  • Wang, Jingfu
  • Lei, Biao
  • Shen, Lili

Abstract

Addressing the growing need of oil-free compressed air has drawn the development of the water-lubricated single-screw air compressor (WLSSAC). For WLSSAC, clearance height is an important design parameters relevant to compressor performance. In this study, a thermodynamic model of the working process of a WLSSAC is established in consideration of the viscous friction power consumption and mass transfer between water and wet air. The theoretical model is simulated by Matlab software, and the accuracy of the theoretical model is verified by experimental results. The influence of each leakage path on the rate of leakage flow, viscous friction power consumption, and efficiency are analyzed using the proposed model. The effects of clearance height on adiabatic efficiency, volumetric efficiency, and specific power are calculated and discussed. Results show that the viscous friction power consumption caused by wall velocity decreases gradually with the increase in clearance height, while the viscous friction power consumption caused by pressure difference increases gradually in each leakage path. With the increase in clearance height, the rate of leakage flow increases gradually, the adiabatic and volumetric efficiencies decrease gradually, and the specific power increases gradually. The clearance height is recommended to be 0.03–0.06 mm for the design of WLSSAC.

Suggested Citation

  • Li, Yanan & Zhi, Ruiping & Wu, Yuting & Wang, Jingfu & Lei, Biao & Shen, Lili, 2022. "Influence of clearance height on performance of water-lubricated single-screw air compressor," Energy, Elsevier, vol. 251(C).
    • Handle: RePEc:eee:energy:v:251:y:2022:i:c:s0360544222008027
    DOI: 10.1016/j.energy.2022.123899
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    References listed on IDEAS

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    1. Wang, Wei & Wu, Yu-ting & Ma, Chong-fang & Xia, Guo-dong & Wang, Jing-fu, 2013. "Experimental study on the performance of single screw expanders by gap adjustment," Energy, Elsevier, vol. 62(C), pages 379-384.
    2. Wen, Qiangyu & Zhi, Ruiping & Wu, Yuting & Lei, Biao & Liu, Shanwei & Shen, Lili, 2020. "Performance optimization of a heat pump integrated with a single-screw refrigeration compressor with liquid refrigerant injection," Energy, Elsevier, vol. 207(C).
    3. Ting Li & Yuchuan Wang & Xiuli Mao & Diyi Chen & Rui Huang & Quanke Feng, 2020. "Development and Experimental Study of the First Stage in a Two-Stage Water-Flooded Single-Screw Compressor Unit for Polyethylene Terephthalate Bottle Blowing System," Energies, MDPI, vol. 13(16), pages 1-21, August.
    4. Shen, Lili & Wang, Wei & Wu, Yuting & Lei, Biao & Zhi, Ruiping & Lu, Yuanwei & Wang, Jingfu & Ma, Chongfang, 2018. "A study of clearance height on the performance of single-screw expanders in small-scale organic Rankine cycles," Energy, Elsevier, vol. 153(C), pages 45-55.
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    Cited by:

    1. Zhou, Xia & Zhang, Hanwei & Rong, Yangyiming & Song, Jian & Fang, Song & Xu, Zhuoren & Zhi, Xiaoqin & Wang, Kai & Qiu, Limin & Markides, Christos N., 2022. "Comparative study for air compression heat recovery based on organic Rankine cycle (ORC) in cryogenic air separation units," Energy, Elsevier, vol. 255(C).
    2. Zhou, Xia & Fang, Song & Zhang, Hanwei & Xu, Zhuoren & Jiang, Hanying & Rong, Yangyiming & Wang, Kai & Zhi, Xiaoqin & Qiu, Limin, 2023. "Dynamic characteristics of a mechanically coupled organic Rankine-vapor compression system for heat-driven cooling," Energy, Elsevier, vol. 280(C).

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