Performance characteristics of free piston linear generator on different equivalence ratio

Nadhari, Wan Noor Aidawati Wan; Ramlan, N. A.; Mohammed, Salah E.; Munir, Sadaf; Zainal, Zulkarnain; Firmansyah, Fajar; Aziz, Abdul; Heikal, Morgan

doi:10.1063/1.5075583

Cited by 2 publications

(1 citation statement)

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“…Through the combination of numerical simulation and experimental verification, the kinematic characteristics of FPHS are studied, the unique kinematic mode of FPHS is clarified and analyzed the action rule of piston motion on the combustion and generation characteristics of the system is given. Nadhari et al 18 proposed a new two-stroke free-piston linear generator prototype with a linear generator to effectively convert mechanical power into electrical energy during expansion. The different features of prototypes and their effects on system performance are discussed.…”

Section: Introductionmentioning

confidence: 99%

The effect of electromagnetic load fluctuation on the gas exchange stability of a free-piston hybrid power system

Yuan

2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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The free-piston hybrid power system (FPHS) is affected by the dynamic coupling of combustion drive, power transmission, piston motion, excitation generation and gas exchange, and its operating state is very different from that of traditional engines. In this paper, the influence of the change of electromagnetic load on the ventilation stability of the whole system is studied by combining the method of system simulation and experimental validation. A dynamic-ventilation one-dimensional coupled gas exchange model was established, and the influence of the fluctuation of the electromagnetic load on the gas exchange is simulated by combining the thermodynamic model with the magnetic inductive load model. The results show that the scavenging efficiency is positively correlated with the load fluctuation, while the trapping efficiency changes with the opposite rule. Specifically, increasing the electromagnetic load properly will increase the time of gas exchange and obtain more fresh charge. The reduction of the electromagnetic load will make the compression process have higher gas pressure and temperature, which the mixture of oil and gas is more homogeneous and the combustion rate is faster after ignition. The stability of the ventilation performance of FPHS is very sensitive to electromagnetic fluctuations. The control of FPHS system can be achieved by adjusting the electromagnetic load.

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Section: Introductionmentioning

confidence: 99%