Regenerative Braking Effects On Isothermal And Adiabatic Energy Storage Of Hydro-Pneumatic Driveline

Mohd Ghazali, Adam Syafiq (2018) Regenerative Braking Effects On Isothermal And Adiabatic Energy Storage Of Hydro-Pneumatic Driveline. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The regenerative braking system is a process whereby the motor is reversed during the deceleration or stopping of a vehicle. Nowadays, there are various types of storage used to capture energy such as electrical, hydraulic, compress and kinetic. Hydrostatic regenerative braking system (HRB) was first retrofitted on a refuse truck. In order to apply HRB in the vehicle, research towards hydraulic energy storage performance will be needed. The hydraulic energy storage also known as an accumulator and the selection of the accumulator is based on their performance. The performance of each process will produce a different result. Thus, this research seeks to simulate regenerative breaking performance for adiabatic and isothermal processes. The result of regenerative braking performance for adiabatic and isothermal processes was obtained from simulation and needed to be compared based on the efficiency. The software used to conduct the simulation is Automation Studio. The result shows that isothermal process gives higher volume effectiveness and energy efficiency which is 13.55% and 17% compared to adiabatic process. However, when it comes to charging process (filling time), the adiabatic process gives higher result which is 18.31% compared to isothermal process. Adiabatic process only takes 112.37 s to reach 200 bar while isothermal process took 126.27 s to reach 200 bar. For the best case, a combination of both processes will be suitable to apply to the accumulator.

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