Optimisation of a quasi-steady model of a free-piston Stirling engine

Ayodeji Sowale, Edward J. Anthony, Athanasios John Kolios

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Energy from waste heat recovery is receiving considerable attention due to the demand for power systems that are less polluting. This has led to the investigation of external combustion engines such as the free-piston Stirling engine (FPSE) due to its ability to generate power from any source of heat and, especially, waste heat. However, there are still some limitations in the modelling, design and practical utilisation of this type of engine. Modelling of the FPSE has proved to be a difficult task due to the lack of mechanical linkages in its configuration, which poses problems for achieving stability. Also, a number of studies have been reported that attempt to optimise the output performance considering the characteristics of the engine configuration. In this study the optimisation of the second-order quasi-steady model of the gamma-type FPSE is carried out using the genetic algorithm (GA) to maximise the performance in terms of power output, and considering the design parameters of components such as piston and displacer damper, geometry of heat exchangers, and regenerator porosity. This present study shows that the GA optimisation of the RE-1000 FPSE design parameters improved its performance from work done and output power of 33.2 J and 996 W, respectively, with thermal efficiency of 23%, to 44.2 J and 1326W with thermal efficiency of 27%.

LanguageEnglish
Number of pages17
JournalEnergies
Volume12
Issue number1
DOIs
Publication statusPublished - 28 Dec 2018

Fingerprint

Free piston engines
Stirling engines
Engine
Optimization
Engines
Genetic algorithms
Heat
Regenerators
Parameter Design
Waste heat
Waste heat utilization
Output
Model
Pistons
Heat exchangers
Genetic Algorithm
Porosity
Configuration
Heat Exchanger
Damper

Keywords

  • free-piston Stirling engine
  • genetic algorithm
  • optimization

Cite this

Sowale, Ayodeji ; Anthony, Edward J. ; Kolios, Athanasios John. / Optimisation of a quasi-steady model of a free-piston Stirling engine. In: Energies. 2018 ; Vol. 12, No. 1.
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Optimisation of a quasi-steady model of a free-piston Stirling engine. / Sowale, Ayodeji; Anthony, Edward J.; Kolios, Athanasios John.

In: Energies, Vol. 12, No. 1, 28.12.2018.

Research output: Contribution to journalArticle

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