Results 101 to 110 of about 156 (145)

Stability analysis of free piston Stirling engines

The European Physical Journal Applied Physics, 2013
This paper presents a stability analysis of a free piston Stirling engine. The model and the detailed calculation of pressures losses are exposed. Stability of the machine is studied by the observation of the eigenvalues of the model matrix. Model validation based on the comparison with NASA experimental results is described.
Bégot, Sylvie, Layes, Guillaume, Lanzetta, François, Nika, Philippe   +3 more
openaire   +1 more source

Dynamic Stability of Free Piston Stirling Engines

14th Biennial Conference on Mechanical Vibration and Noise: Nonlinear Vibrations, 1993
Abstract A Stirling engine develops work output from a thermal input. It is a quiet pollution free engine, which can use any heat source, including solar power. The piston-displacer mechanism is essentially a vibrating spring mass system and can be dynamically modelled, leading to a set of coupled nonlinear ordinary differential ...
Necati Ulusoy, Frances McCaughan
openaire   +1 more source

Linear Dynamics of Free-Piston Stirling Engines

Proceedings of the Institution of Mechanical Engineers, Part A: Power and Process Engineering, 1985
The free-piston Stirling engine (FPSE) is a heat driven mechanical oscillator from which power can be extracted. Linear dynamics is applied here in order to obtain: a stability criterion, a means for determining the oscillation frequency, relative amplitudes of the dynamic components, effects of friction on starting and the locus of the roots of the ...
R W Redlich, D M Berchowitz
openaire   +1 more source

Large Free-Piston Stirling Engines

1985
The word ‘large’ applied to Stirling engines means different things to different people. An engine having a 3 kW output would be large to those working on artificial hearts or cryocoolers for electronic applications. It would be small, negligibly so, to those interested in locomotive propulsion.
Graham Walker, J. R. Senft
openaire   +1 more source

Hopf Instabilities in Free Piston Stirling Engines

Journal of Computational and Nonlinear Dynamics, 2013
Free piston Stirling engines (FPSEs) are examples of closed cycle regenerative engines, which can be used to convert thermal energy into mechanical energy. These engines are multidegree-of-freedom dynamical systems, which are designed to operate in a periodic manner. Traditionally, for design purposes, linear models are used and the associated periodic
Farhan Choudhary, Balakumar Balachandran
openaire   +1 more source

Regenerator Losses in a Free Piston Stirling Engine

2016
Due to the need for alternative means that can be used to generate power with high efficiency and less harm to the environment, the free piston Stirling engine has emerged and research has been carried out to prove its relevance. This study is carried out in the thermal energy conversion unit, using solar energy to generate power.
Ayodeji Sowale, Sarah Odofin
openaire   +1 more source

Structural design of Stirling engine with free pistons

AIP Conference Proceedings, 2014
Stirling engine is a device that converts thermal energy to mechanical work, which is mostly used to drive a generator of electricity. Advantage of Stirling engine is that it works with closed-cycle, where working medium is regularly cooled and heated, which acts on the working piston. This engine can be made in three modifications - alpha, beta, gamma.
Jozef Matusov, Stanislav Gavlas, Milan Malcho   +2 more
openaire   +1 more source

Reflections on Free-Piston Stirling Engines, Part 2: Stable Operation

Journal of Propulsion and Power, 1998
Abstract: In this paper a new linearization technique of the dynamic balance equations of a free-piston Stirling machine is developed. It takes into account the non-linear thermo-fluid-dynamic terms inherent in the machine, while keeping the linearity of the differential dynamic equations.
DE MONTE, FILIPPO, BENVENUTO G.
openaire   +3 more sources

Axially Opposed Magnetization for Free Piston Stirling Engines

International Journal of Applied Electromagnetics and Mechanics, 2013
A renewed focus on Free Piston Stirling Engines (FPSE) for Green Solar based power generation provides a vehicle to explore linear alternator technologies for improved performance and efficiency. This paper evaluates Axially Opposed Magnetization (AOM) linear alternators and the potential advantages this technology provides mechanically and ...
Rogers, Uri, Clark, David, Jackson, Scott, Ferguson, Tammy, Harris, David   +4 more
openaire   +1 more source

Dynamic analysis of a simplified free-piston Stirling engine

SIMULATION, 1980
Lumped-volume dynamic equations are derived using an energy-state formulation. This technique requires the writing of state functions for kinetic and poten tial energy. A Rayleigh dissipation function accounts for losses in the system. Using these functions, a Lagrangian is formed and the equations of motion for the system are derived.
Carl J. Daniele, Carl F. Lorenzo
openaire   +1 more source