A free-piston Stirling cryocooler using metal diaphragms

Caughley, Alan; Sellier, Mathieu; Gschwendtner, Michael; Tucker, Anne M.

doi:10.1016/j.cryogenics.2016.08.005

Cited by 12 publications

(3 citation statements)

References 9 publications

(12 reference statements)

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“…The pendulum type is characterized by a pendulum mechanism, which is the reason of working piston resonance, while the displacer is free to move. Instead, in the diaphragm engine, the working piston is replaced by a diaphragm which flexes to effect the change of working gas volume [28]. This prevents the gas leakages which occur in conventional FPSE where the displacer's guiding shaft goes through a clearance seal into a chamber called bounce space [28].…”

Section: Classificationmentioning

confidence: 99%

“…Instead, in the diaphragm engine, the working piston is replaced by a diaphragm which flexes to effect the change of working gas volume [28]. This prevents the gas leakages which occur in conventional FPSE where the displacer's guiding shaft goes through a clearance seal into a chamber called bounce space [28]. The duplex FPSE is able to work as both engine and refrigerator simultaneously due to two displacers that, with the working piston, serves one as heat engine and one as heat pump.…”

Section: Classificationmentioning

confidence: 99%

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Free-Piston Stirling Engine Technologies and Models: A Review

Perozziello

Grosu

Vaglieco³

2021

Energies

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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. It comprises an external combustion engine that can convert any external heat source into mechanical power, through cyclic expansion and compression of a working gas in a closed-regenerative cycle, with or without driving mechanisms. The free-piston Stirling Engine is significantly preferred because of the absence of any mechanical linkage resulting in longer operating life, lower noise pollution, maintenance and vibration free, self-starting and high thermal efficiency. The aim of this paper is to summarize the research works on the free-piston Stirling engine technologies and models. First, the working principles of the free-piston Stirling engine are described, identifying different configurations. Then, several applications are presented. Finally, a detailed review of the models available in literature is given, pointing out the main assumptions and equations.

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Section: Classificationmentioning

confidence: 99%

Section: Classificationmentioning

confidence: 99%

Free-Piston Stirling Engine Technologies and Models: A Review

Perozziello

Grosu

Vaglieco³

2021

Energies

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“…The traditional FPSEs are usually passive systems, and the required conditions for their operation are either the existence of a stable limit cycle from nonlinear point of view or the marginal stability from linear system standpoint . Furthermore, the free piston Stirling converters can be used either to produce mechanical power using high‐temperature heat sources or to create refrigeration by reversely applying work to them …”

Section: Free Piston Stirling Enginesmentioning

confidence: 99%

Free piston Stirling engines: A review

Zare

Tavakolpour-Saleh

2019

Int J Energy Res

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This paper presents a detailed review on free piston Stirling engines (FPSEs) technology. Generally, the Stirling engines can be categorized into two broad classes comprising kinematic and dynamic converters among which FPSEs are known as the dynamic type. Other well-known dynamic Stirling converters are Fluidyne and thermosacoustic engines among which the thermosacoustic ones are the most advanced Stirling converters recently presented. In this research, the dynamic Stirling engines are first introduced and reviewed. Then, the review work is directed toward the FPSEs, one of the most reliable dynamic Stirling converters utilized in different applications such as combined heat and power systems (CHPs). Subsequently, the working principles of different types of FPSEs and their performance are summarized. Next, several manufactured FPSEs, as well as their corresponding features and applications, are discussed. Finally, the article is conducted to analysis and modeling approaches of FPSEs.Accordingly, linear and nonlinear analytical techniques of FPSEs are introduced, and some comparative data are provided to verify the modeling schemes. Then, various design parameters affecting the engine performance are introduced and studied. The outcomes of this review work demonstrate the potential of FPSEs for different applications and reveal that the perturbation-based model is likely the most comprehensive nonlinear method for modeling and design of the FPSEs.

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