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Energy Analysis and Verification of a Constant-Pressure Elastic-Strain Energy Accumulator Based on Exergy Method

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  • Hongwang Du

    (Ship Electromechanical Equipment Institute, Dalian Maritime University, Room 312-2, Mechanical and Electrical Building, No.1 Linghai Road, Ganjingzi District, Dalian 116026, China)

  • Xin Bian

    (Ship Electromechanical Equipment Institute, Dalian Maritime University, Room 312-2, Mechanical and Electrical Building, No.1 Linghai Road, Ganjingzi District, Dalian 116026, China)

  • Wei Xiong

    (Ship Electromechanical Equipment Institute, Dalian Maritime University, Room 312-2, Mechanical and Electrical Building, No.1 Linghai Road, Ganjingzi District, Dalian 116026, China)

Abstract

Focusing on the low energy-storage efficiency and unstable energy output of existing accumulators, this paper proposes a novel constant-pressure elastic-strain energy accumulator based on the rubber material hyperelastic effect. The proposed accumulator can store and release energy at a constant pressure. Based on the exergy analysis method, the charging/discharging energy storage efficiency of a constant-pressure elastic-strain energy accumulator was analyzed. Then, the Mullins effect on the rubber airbag over multiple charging/discharging cycles was studied. Finally, a test platform was established to verify the energy storage efficiency, as well as the expansion and contraction pressure stability of the rubber accumulator during charging/discharging cycles. The experimental results showed that the energy storage efficiency calculation by the exergy analysis method was more accurate compared with the enthalpy analysis method. In tests with more than 200 cycles, the rubber airbag energy storage efficiency was always higher than 76%, and the expansion and contraction pressure errors at a steady state were less than 2.92 and 1.79 kPa, respectively. The results showed that the rubber airbag could be used as an effective energy storage component, which is very meaningful for energy recovery in pneumatic or hydraulic systems.

Suggested Citation

  • Hongwang Du & Xin Bian & Wei Xiong, 2022. "Energy Analysis and Verification of a Constant-Pressure Elastic-Strain Energy Accumulator Based on Exergy Method," Sustainability, MDPI, vol. 14(18), pages 1-14, September.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:18:p:11689-:d:917607
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    References listed on IDEAS

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    1. Kwon, Hyukjoon & Ivantysynova, Monika, 2021. "Experimental and theoretical studies on energy characteristics of hydraulic hybrids for thermal management," Energy, Elsevier, vol. 223(C).
    2. Cummins, Joshua J. & Nash, Christopher J. & Thomas, Seth & Justice, Aaron & Mahadevan, Sankaran & Adams, Douglas E. & Barth, Eric J., 2017. "Energy conservation in industrial pneumatics: A state model for predicting energetic savings using a novel pneumatic strain energy accumulator," Applied Energy, Elsevier, vol. 198(C), pages 239-249.
    3. A. Pfeffer & T. Glück & W. Kemmetmüller & A. Kugi, 2016. "Mathematical modelling of a hydraulic accumulator for hydraulic hybrid drives," Mathematical and Computer Modelling of Dynamical Systems, Taylor & Francis Journals, vol. 22(5), pages 397-411, September.
    4. Hongwang Du & Wei Liu & Xin Bian & Wei Xiong, 2022. "Energy-Saving for Industrial Pneumatic Actuation Systems by Exhausted Air Reuse Based on a Constant Pressure Elastic Accumulator," Sustainability, MDPI, vol. 14(6), pages 1-13, March.
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