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Performance Study on a Single-Screw Expander for a Small-Scale Pressure Recovery System

Author

Listed:
  • Guoqiang Li

    (Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China)

  • Yuting Wu

    (Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China)

  • Yeqiang Zhang

    (School of Energy and Power Engineering, Zhengzhou University of Light Industry, No. 5 Dongfeng Road, Zhengzhou 450002, China)

  • Ruiping Zhi

    (Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China)

  • Jingfu Wang

    (Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China)

  • Chongfang Ma

    (Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China)

Abstract

A single-screw expander with 195 mm diameter is developed to recover pressure energy in letdown stations. An experiment system is established using compressed air as a working fluid instead of natural gas. Experiments are conducted via measurements for important parameters, such as inlet and outlet temperature and pressure, volume flow rate and power output. The influence of inlet pressure and rotational speed on the performance are also analyzed. Results indicate that the single-screw expander achieved good output characteristics, in which 2800 rpm is considered the best working speed. The maximum volumetric efficiency, isentropic efficiency, overall efficiency, and the lowest air-consumption are 51.1 kW, 83.5%, 66.4%, 62.2%, and 44.1 kg/(kW·h), respectively. If a single-screw expander is adopted in a pressure energy recovery system applied in a certain domestic natural gas letdown station, the isentropic efficiency of the single-screw expander and overall efficiency of the system are found to be 66.4% and 62.2%, respectively. Then the system performances are predicted, in which the lowest methane consumption is 27.3 kg/(kW·h). The installed capacity is estimated as 204.7 kW, and the annual power generation is 43.3 MWh. In the next stage, a pressure energy recovery demonstration project that recycles natural gas will be established within China, with the single-screw expander serving as the power machine.

Suggested Citation

  • Guoqiang Li & Yuting Wu & Yeqiang Zhang & Ruiping Zhi & Jingfu Wang & Chongfang Ma, 2016. "Performance Study on a Single-Screw Expander for a Small-Scale Pressure Recovery System," Energies, MDPI, vol. 10(1), pages 1-14, December.
    • Handle: RePEc:gam:jeners:v:10:y:2016:i:1:p:6-:d:85916
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    References listed on IDEAS

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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, vol. 11(6), pages 1-14, May.
    2. Li, Yong & Xie, Gongnan & Sunden, Bengt & Lu, Yuanwei & Wu, Yuting & Qin, Jiang, 2018. "Performance study on a single-screw compressor for a portable natural gas liquefaction process," Energy, Elsevier, vol. 148(C), pages 1032-1045.
    3. Xiong, Yaxuan & Zhang, Aitonglu & Peng, Xiaodong & Yao, Chenhua & Wang, Nan & Wu, Yuting & Xu, Qian & Ma, Chongfang, 2023. "Investigation of a sole gas expander for gas pressure regulation and energy recovery," Energy, Elsevier, vol. 281(C).
    4. Tian, Yafen & Xing, Ziwen & He, Zhilong & Wu, Huagen, 2017. "Modeling and performance analysis of twin-screw steam expander under fluctuating operating conditions in steam pipeline pressure energy recovery applications," Energy, Elsevier, vol. 141(C), pages 692-701.
    5. Li, Guoqiang & Lei, Biao & Wu, Yuting & Zhi, Ruiping & Zhao, Yingkun & Guo, Zhiyu & Liu, Guangyu & Ma, Chongfang, 2018. "Influence of inlet pressure and rotational speed on the performance of high pressure single screw expander prototype," Energy, Elsevier, vol. 147(C), pages 279-285.

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