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Energy conversion characteristics of a hydropneumatic transformer in a sustainable-energy vehicle

Author

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  • Shi, Yan
  • Wu, Tiecheng
  • Cai, Maolin
  • Wang, Yixuan
  • Xu, Weiqing

Abstract

As a type of sustainable energy, compressed air energy can be used to drive vehicles, which is applicable to situations requiring explosion prevention and no pollution emissions, including chemical plants and airports. As a key component of an air-driven hydraulic vehicle, an air-driven hydraulic transformer, which is called a hydropneumatic (HP) transformer, is used to pump high-pressure oil for such a vehicle’s hydraulic system. To improve the power and efficiency of the HP transformer, in this paper, firstly, a mathematical model of its working process was developed. Secondly, to verify the mathematical model, a dedicated test bench for the HP transformer was established and studied. Through experimental and simulation of the designed HP transformer when the input air pressure, output oil pressure and area ratio are regulated within the ranges of 0.625–0.75MPa, 1.7–2.2MPa and 3–5 respectively, it can be concluded that the mathematical model developed in this study is accurate. Furthermore, to improve the output power of the HP transformer, the input air pressure, output oil pressure and area ratio should be increased. Additionally, decreasing the input air pressure from 0.75MPa to 0.625MPa may improve the efficiency of the transformer by 14%, increasing the output pressure from 1.7MPa to 2.2MPa may improve the efficiency of the transformer by 3%, and decreasing the area ratio of the pistons from 5 to 3 may improve the efficiency of the transformer by 10%. This study can be referred to as the performance and design optimization of air-driven hydraulic HP transformers.

Suggested Citation

  • Shi, Yan & Wu, Tiecheng & Cai, Maolin & Wang, Yixuan & Xu, Weiqing, 2016. "Energy conversion characteristics of a hydropneumatic transformer in a sustainable-energy vehicle," Applied Energy, Elsevier, vol. 171(C), pages 77-85.
    • Handle: RePEc:eee:appene:v:171:y:2016:i:c:p:77-85
    DOI: 10.1016/j.apenergy.2016.03.034
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    References listed on IDEAS

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    Cited by:

    1. Leszczynski, J.S. & Grybos, D., 2019. "Compensation for the complexity and over-scaling in industrial pneumatic systems by the accumulation and reuse of exhaust air," Applied Energy, Elsevier, vol. 239(C), pages 1130-1141.
    2. Pugi, L. & Pagliai, M. & Nocentini, A. & Lutzemberger, G. & Pretto, A., 2017. "Design of a hydraulic servo-actuation fed by a regenerative braking system," Applied Energy, Elsevier, vol. 187(C), pages 96-115.
    3. Yonghong Xu & Xin Wang & Hongguang Zhang & Fubin Yang & Jia Liang & Hailong Yang & Kai Niu & Zhuxian Liu & Yan Wang & Yuting Wu, 2022. "Experimental Investigation of the Output Performance of Compressed-Air-Powered Vehicles with a Pneumatic Motor," Sustainability, MDPI, vol. 14(22), pages 1-21, November.
    4. Wang, Guohui & Yang, Yanan & Wang, Shuxin & Zhang, Hongwei & Wang, Yanhui, 2019. "Efficiency analysis and experimental validation of the ocean thermal energy conversion with phase change material for underwater vehicle," Applied Energy, Elsevier, vol. 248(C), pages 475-488.
    5. He, Deqiang & Teng, Xiaoliang & Chen, Yanjun & Liu, Bin & Wang, Heliang & Li, Xianwang & Ma, Rui, 2022. "Energy saving in metro ventilation system based on multi-factor analysis and air characteristics of piston vent," Applied Energy, Elsevier, vol. 307(C).
    6. Leszczynski, J.S. & Grybos, D., 2020. "Sensitivity analysis of Double Transmission Double Expansion (DTDE) systems for assessment of the environmental impact of recovering energy waste in exhaust air from compressed air systems," Applied Energy, Elsevier, vol. 278(C).
    7. Gong, Jun & Zhang, Daqing & Guo, yong & Liu, Changsheng & Zhao, Yuming & Hu, Peng & Quan, weicai, 2019. "Power control strategy and performance evaluation of a novel electro-hydraulic energy-saving system," Applied Energy, Elsevier, vol. 233, pages 724-734.
    8. Yeming Zhang & Ke Li & Geng Wang & Jingcheng Liu & Maolin Cai, 2019. "Nonlinear Model Establishment and Experimental Verification of a Pneumatic Rotary Actuator Position Servo System," Energies, MDPI, vol. 12(6), pages 1-24, March.

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