TY - GEN
T1 - Research on the energy storage characteristics of diaphragm accumulator
AU - Zhang, Qilin
AU - Wu, Wei
AU - Hu, Jibin
AU - Yuan, Shihua
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/11/24
Y1 - 2015/11/24
N2 - Accumulator is the important energy storage element in hydraulic system. It is very important to study accumulator efficiency for improving the performance of hydraulic system. In this paper, the mathematical model of the diaphragm accumulator hydraulic storage characteristic is established based on its structure feature and working principle. This paper establishes the thermal model, taking the thermal dynamics of air and the heat exchange among the bladder, oil, the shell into consideration; and establishes the fluid dynamical model, taking the fluid characteristic of oil and the influence of valve into consideration. The platform is built and the charge-discharge experiment is conducted in low and high frequency conditions. The pressure and temperature in air chamber and oil chamber is measured to calculate the power loss of thermal cycle and the hydraulic loss in the inlet. The result of the simulation and the experiment shows that: in the low charge-discharge frequency condition, the thermal efficiency and hydraulic efficiency are both more than 90%; in the high charge-discharge frequency condition, the thermal efficiency increases, while with the increase of flow velocity, the hydraulic efficiency sharply decreases due to throttling loss.
AB - Accumulator is the important energy storage element in hydraulic system. It is very important to study accumulator efficiency for improving the performance of hydraulic system. In this paper, the mathematical model of the diaphragm accumulator hydraulic storage characteristic is established based on its structure feature and working principle. This paper establishes the thermal model, taking the thermal dynamics of air and the heat exchange among the bladder, oil, the shell into consideration; and establishes the fluid dynamical model, taking the fluid characteristic of oil and the influence of valve into consideration. The platform is built and the charge-discharge experiment is conducted in low and high frequency conditions. The pressure and temperature in air chamber and oil chamber is measured to calculate the power loss of thermal cycle and the hydraulic loss in the inlet. The result of the simulation and the experiment shows that: in the low charge-discharge frequency condition, the thermal efficiency and hydraulic efficiency are both more than 90%; in the high charge-discharge frequency condition, the thermal efficiency increases, while with the increase of flow velocity, the hydraulic efficiency sharply decreases due to throttling loss.
KW - charge-discharge frequency
KW - diaphragm accumulator
KW - energy-storage efficiency
KW - mathematical model
KW - throttling loss
UR - http://www.scopus.com/inward/record.url?scp=84962539543&partnerID=8YFLogxK
U2 - 10.1109/FPM.2015.7337242
DO - 10.1109/FPM.2015.7337242
M3 - Conference contribution
AN - SCOPUS:84962539543
T3 - Proceedings of 2015 International Conference on Fluid Power and Mechatronics, FPM 2015
SP - 901
EP - 905
BT - Proceedings of 2015 International Conference on Fluid Power and Mechatronics, FPM 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 7th International Conference on Fluid Power and Mechatronics, FPM 2015
Y2 - 5 August 2015 through 7 August 2015
ER -