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Constant pressure hydraulic energy storage through a variable area piston hydraulic accumulator

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  • Van de Ven, James D.

Abstract

Hydraulic accumulators are used in a variety of applications to minimize the pressure variation in hydraulic circuits and to store energy. Conventional hydraulic accumulators suffer from two major limitations, the hydraulic system pressure varies with the quantity of energy stored and the energy density is significantly lower than other energy domains. In this paper, a novel hydraulic accumulator is presented that uses a piston with an area that varies with stroke to maintain a constant hydraulic system pressure while the gas pressure changes. The variable area piston is sealed with a fabric reinforced rolling diaphragm. In this work, the piston radius profile is developed as a function of the piston displacement and then transformed into a function of the axial contact location between the piston and the diaphragm. The piston profile was solved numerically for a variety of conditions using both transformation methods to illustrate the geometric design trade-offs. Using a variable area gas piston with a fixed cylinder area, the maximum gas volume ratio was 1.8:1. An analysis of the energy density revealed that the constant pressure accumulator provides a 16% improvement in energy density over a conventional accumulator at a volume ratio of 2.71:1 and also exceeds the maximum energy density of a conventional accumulator at the lower volume ratio of 1.8:1. This new promising technology maintains a constant hydraulic system pressure independent of the quantity of energy stored, easing system control and allowing other circuit components to be downsized to meet the same power requirements, while also increases the energy storage density.

Suggested Citation

  • Van de Ven, James D., 2013. "Constant pressure hydraulic energy storage through a variable area piston hydraulic accumulator," Applied Energy, Elsevier, vol. 105(C), pages 262-270.
  • Handle: RePEc:eee:appene:v:105:y:2013:i:c:p:262-270
    DOI: 10.1016/j.apenergy.2012.12.059
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    Citations

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    Cited by:

    1. Yu, Jin & Song, Yurun & Zhang, Huasen & Dong, Xiaohan, 2022. "Novel design of compound coupled hydro-mechanical transmission on heavy-duty vehicle for energy recycling," Energy, Elsevier, vol. 239(PD).
    2. Wu, Wei & Hu, Jibin & Jing, Chongbo & Jiang, Zhonglin & Yuan, Shihua, 2014. "Investigation of energy efficient hydraulic hybrid propulsion system for automobiles," Energy, Elsevier, vol. 73(C), pages 497-505.
    3. Donglai Zhao & Wenjie Ge & Xiaojuan Mo & Bo Liu & Dianbiao Dong, 2019. "Design of A New Hydraulic Accumulator for Transient Large Flow Compensation," Energies, MDPI, vol. 12(16), pages 1-17, August.
    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.
    5. 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.
    6. Olusola Fajinmi & Josiah L. Munda & Yskandar Hamam & Olawale Popoola, 2023. "Compressed Air Energy Storage as a Battery Energy Storage System for Various Application Domains: A Review," Energies, MDPI, vol. 16(18), pages 1-42, September.
    7. Latas, Waldemar & Stojek, Jerzy, 2018. "A new type of hydrokinetic accumulator and its simulation in hydraulic lift with energy recovery system," Energy, Elsevier, vol. 153(C), pages 836-848.
    8. Pavković, D. & Hoić, M. & Deur, J. & Petrić, J., 2014. "Energy storage systems sizing study for a high-altitude wind energy application," Energy, Elsevier, vol. 76(C), pages 91-103.

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