Alexandria Engineering Journal, 2022 The free-piston linear generator (FPLG) with a dual-piston air-driven system is a novel type of energy conversion device that converts mechanical energy into electric power through a linear generator.
A. Rashid A. Aziz +5 more
doaj +3 more sources
Numerical Investigation on NOx Emission of a Hydrogen-Fuelled Dual-Cylinder Free-Piston Engine
Applied Sciences, 2023 The free-piston engine is a type of none-crank engine that could be operated under variable compression ratio, and this provides it flexible fuel applicability and low engine emission potential.
Chengqian Li +4 more
doaj +2 more sources
Performance investigation of an active free-piston Stirling engine using artificial neural network and firefly optimization algorithm. [PDF]
HeliyonThe aim of this study is to explore the characteristics of an active Free-Piston Stirling Engine (AFPSE) through the use of machine learning methods. Due to the time-intensive nature of extracting simulation results from complex thermal equations, an ...
Masoumi AP +2 more
europepmc +2 more sources
Energies, 2023 Free-piston engine linear generators (FPELGs) are an innovative linear power device that exhibits the distinctive dynamics of pistons and performance of free-piston engines.
Chendong Guo +5 more
doaj +2 more sources
Delta shock as free piston in pressureless Euler flows [PDF]
Zeitschrift für Angewandte Mathematik und Physik, 2022 We establish the equivalence of free piston and delta shock, for the one-space-dimensional pressureless compressible Euler equations. The delta shock appearing in the singular Riemann problem is exactly the piston that may move freely forward or backward
Le Gao, Aifang Qu, Hairong Yuan
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Study on Leakage Effect Factors of Two-Stroke Micro Free Piston Swing Engine [PDF]
Micromachines, 2022 The two-stroke micro free piston swing engine (MFPSE) is a portable power device. Its seal performance plays an important role in the dynamic properties and efficiency of microengines.
Shujing Miao +5 more
doaj +2 more sources
Numerical Analysis of the Piston Motion in a Free Piston Driver
JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2007 A numerical analysis of a piston motion in a free piston driver has been conducted including a diaphragm rupture. Quasi-one-dimensional flow is assumed in the driver. Various losses, which are generated in a compression process, are simplified. A process of the diaphragm rupture is assumed by Outa’s model. Experiments are also conducted by using a free
Mizoguchi, Makoto, Aso, Shigeru
openaire +3 more sources
Effect of Nonlinear Spring Characteristics on the Efficiency of Free-Piston Engine Generator
Energies, 2022 Piston motion is an important factor in improving the energy conversion efficiency of free-piston engine generators (FPEGs), and an air cylinder is an important component affecting piston motion.
Shoma Irie +4 more
doaj +2 more sources
Free-Piston Stirling Engine Technologies and Models: A Review
Energies, 2021 The Stirling engine is an alternative solution to produce cleaner energy in order to achieve the reduction of the fossil fuel consumption and the CO2 emissions.
Carmela Perozziello +2 more
doaj +2 more sources
Quantitative comparison of the operating characteristics and engine performances of typical configurations of free-piston engine linear generator [PDF]
Scientific ReportsDue to their unique operating characteristics and high thermal efficiencies, free-piston engine linear generator (FPELG) has attracted research interest in recent years, thanks to the crankshaft absence.
Chendong Guo +4 more
doaj +2 more sources