Title

Design and energy saving analysis of a novel isobaric compressed air storage device in pneumatic systems

Document Type

Article

Publication Date

6-1-2021

Publication Title

Journal of Energy Storage

Volume

38

Keywords

Compressed air energy storage, Energy saving, Isobaric storage, Pneumatic system

Abstract

Compared with traditional isochoric storage of compressed air in pneumatic systems, isobaric storage possesses many advantages. In this study, a novel isobaric compressed air storage device is proposed by introducing compressed gas energy storage and a nonlinear cam transformation mechanism. The critical profiles on both sides of cam are deduced and the mathematical model of a typical pneumatic system is established under different control modes. A parametric analysis is also conducted to reveal how the energy-saving performance can be affected by several factors. The results show that this new isobaric compressed air storage device presents favorable constant-pressure characteristic and energy-saving performance. With a pneumatic system working pressure of 0.4 MPa, 18% energy savings can be achieved and the compressed air pressure is stable within 2.14%. The working pressure of system has a significant effect on the energy-saving performance and the energy-saving rate decreases with the increasing working pressure. The proposed novel isobaric compressed air storage device provides a new way to reduce pressure and energy consumption of pneumatic systems.

DOI

10.1016/j.est.2021.102614

E-ISSN

2352152X

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