Parameters coupling designation of diesel free-piston linear alternator

Mao, Jinlong; Zuo, Zhengxing; Feng, Huihua

doi:10.1016/j.apenergy.2011.05.051

Cited by 73 publications

(37 citation statements)

References 18 publications

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“…Some research into starting FPLEs examined piston dynamics under various operating parameters such as induced current, and thrust force, as shown in Refs. [58][59][60][61]. Jia et al [61] experimentally investigated the starting process of an FPLE under the effects of thrust force.…”

Section: Piston Dynamicsmentioning

confidence: 99%

A review of free-piston linear engines

2016

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Section: Piston Dynamicsmentioning

confidence: 99%

A review of free-piston linear engines

2016

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“…A commercial permanent-magnet linear generator was chosen to minimize design cost and time in the prototype [2]. The operation of the linear generator is periodic during operation of the FPELG.…”

Section: Linear Generator Modelingmentioning

confidence: 99%

“…The entire system can be seen as an open system. Assuming that at any instant in time the temperature and pressure in the cylinder are in thermodynamic equilibrium, and ignoring the effects of vaporizing liquid droplets, fluid flow, combustion chamber geometry or spatial variations of the mixture's composition, the equations describing the state in the cylinder are the conservation of mass and the first law of thermodynamics [2,4,5,24]:…”

Section: Thermodynamic Modellingmentioning

confidence: 99%

Stable Operation and Electricity Generating Characteristics of a Single-Cylinder Free Piston Engine Linear Generator: Simulation and Experiments

et al. 2015

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Abstract:We present a novel design of a single-cylinder free piston engine linear generator (FPELG) incorporating a linear motor as a rebound device. A systematic simulation model of this FPELG system was built containing a kinematic and dynamic model of the piston and mover, a magneto-electric model of the linear generator, a thermodynamic model of the single-cylinder engine, and a friction model between the piston ring and cylinder liner. Simulations were performed to understand the relationships between pre-set motor parameters and the running performance of the FPELG. From the simulation results, it was found that a motor rebound force with a parabolic profile had clear advantages over a force with a triangular profile, such as a higher running frequency and peak cylinder pressure, faster piston motion, etc. The rebound position and the amplitude of rebound force were also determined by simulations. The energy conversion characteristics of the generator were obtained from our FPELG test rig. The parameters of intake pressure, motor frequency, and load resistance were varied over certain ranges, and relationships among these three parameters were obtained. The electricity-generating characteristic parameters include output power and system efficiency, which can measure OPEN ACCESSEnergies 2015, 8 766 the quality of matching the controllable parameters. The output power can reach 25.9 W and the system efficiency can reach 13.7%. The results in terms of matching parameters and electricity-generating characteristics should be useful to future research in adapting these engines to various operating modes.

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“…To start the free piston engine, electrical power is supplied to the linear electric machine to drive the translator oscillate, operating the linear electric machine as a motor. 3,9,10 In most cases, however, the drive force is not big enough to start free piston engine in one stroke. Then, an oscillation starting approach is proposed, which has been accepted in most FPLA concepts currently.…”

Section: Introductionmentioning

confidence: 99%

“…A number of previous researches concentrate on design, simulation, and experiment of the matching relationship for steady-state operation. 9,10,18 However, limited study has been conducted to investigate the matching relationship for engine start-up.…”

Section: Introductionmentioning

confidence: 99%

Parameters matching requirements for diesel free piston linear alternator start-up

Zuo

Feng

et al. 2015

Advances in Mechanical Engineering

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It is important to identify the relationship between the starting requirements and the structure parameters of the diesel free piston linear alternator on the structural design stage. In this article, the forces applied on the moving part during the starting process are analyzed, and an oscillation model is established. The numerical simulation results of the oscillation model are presented, and the energy-transfer mechanism is analyzed. Then, the oscillation model is simplified by utilizing the energy balance theory. Expressions of the achieved starting frequency and required starting force are derived and the effects of different design variables on them are investigated. The results show that the achieved compression ratio is determined by the energy balance between the friction consumption and the energy supplied by the starting force. The starting frequency achieved and starting force required are associated with the cylinder bore, the moving mass, and effective stroke of the engine, which can be applied to the matching design and optimization of the prototype.

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Parameters coupling designation of diesel free-piston linear alternator

Cited by 73 publications

References 18 publications

A review of free-piston linear engines

A review of free-piston linear engines

Stable Operation and Electricity Generating Characteristics of a Single-Cylinder Free Piston Engine Linear Generator: Simulation and Experiments

Parameters matching requirements for diesel free piston linear alternator start-up

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