Design and energy characteristic analysis of a flexible isobaric strain-energy compressed-air storage device

Du, Hongwang; Bian, Xin; Xiong, Wei

doi:10.1016/j.est.2022.104312

Cited by 6 publications

(1 citation statement)

References 18 publications

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“…The structure of a constant-pressure strain-energy accumulator [19,20] is shown in Figure 1, which is mainly composed of a rubber airbag, rigid shield, fixed ring, quick coupling, etc. The rubber airbag is used to store energy.…”

Section: Elastic-strain Energy Accumulator Designmentioning

confidence: 99%

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

Bian²,

Xiong³

2022

Sustainability

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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.

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Section: Elastic-strain Energy Accumulator Designmentioning

confidence: 99%