Experimental and numerical flow investigation of Stirling engine regenerator

Costa, S.; Tutar, Mustafa; Barreno, I.; Esnaola, J.A.; Barrutia, Haritz; García, David; González, Miguel-Angel; Prieto, Jesús-Ignacio

doi:10.1016/j.energy.2014.06.002

Cited by 62 publications

(19 citation statements)

References 7 publications

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“…At the present time several researchers are working to improve the basic ideas of the Stirling engine [4,5,6,7]. The whole engine is a sophisticated compound of simple ideas.…”

Section: Introductionmentioning

confidence: 99%

Alternative thermodynamic cycle for the Stirling machine

Romanelli

2017

American Journal of Physics

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We develop an alternative thermodynamic cycle for the Stirling machine, where the polytropic process plays a central role. Analytical expressions for pressure and temperatures of the working gas are obtained as a function of the volume and the parameter which characterizes the polytropic process. This approach achieves a closer agreement with the experimental pressure-volume diagram and can be adapted to any type of the Stirling engine.

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“…At the present time several researchers are working to improve the basic ideas of the Stirling engine [4,5,6,7]. The whole engine is a sophisticated compound of simple ideas.…”

Section: Introductionmentioning

confidence: 99%

Alternative thermodynamic cycle for the Stirling machine

Romanelli

2017

American Journal of Physics

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“…The optimization of the heat exchangers focuses on reducing pressure losses and increasing the heat transfer capacity. Recent studies have focused on the characterization of this phenomenon [5] as it is crucial in CHP applications to maximize the ratio between generated electrical power and source energy input [6].…”

Section: Introductionmentioning

confidence: 99%

Numerical correlation for the pressure drop in Stirling engine heat exchangers

Barreno¹,

Costa²,

Cordón³

et al. 2015

International Journal of Thermal Sciences

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“…Thermoacoustic theory describes that the flow resistance of the regular flow channel is a constant [17][18][19], independent of the velocity amplitude, whereas that in the porous media with tortuous flow channels is shown to increase with the velocity [28][29][30] or Reynolds number [2][3][4][5]7]. From measurements of the acoustic field, we have proposed modification of the effective radius r 0 to have velocity dependence [16] as…”

Section: Discussionmentioning

confidence: 99%

“…The heat flow can be estimated by inserting T Nu into Equation (8) and by then using Equation (7). Although this derivation would not qualify as a legitimate procedure, as we show later, it yields heat flows adequately to a similar degree to those of other methods tested in this study.…”

Section: Axial Heat Flow Estimated By Empirical Equationsmentioning

confidence: 99%

“…This difficulty is attributable to tortuous flow channels inherent to the stacked-screen regenerator, which poses an obstacle from a theoretical perspective. Many experimental studies [2][3][4][5][6][7] have addressed this issue in oscillatory flow with frequencies below several tens of Hertz, aiming at gaining fundamental knowledge related to the mechanical Stirling engine. In the frequency range of thermoacoustic engines, however, experimental studies remain insufficient because they usually operate at several tens to hundreds of Hertz [1,[8][9][10][11][12][13], even up to 23 kHz [14].…”

Section: Introductionmentioning

confidence: 99%

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Measurement of Heat Flow Transmitted through a Stacked-Screen Regenerator of Thermoacoustic Engine

Hsu

Biwa

2017

Applied Sciences

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Abstract:A stacked-screen regenerator is a key component in a thermoacoustic Stirling engine. Therefore, the choice of suitable mesh screens is important in the engine design. To verify the applicability of four empirical equations used in the field of thermoacoustic engines and Stirling engines, this report describes the measurements of heat flow rates transmitted through the stacked screen regenerator inserted in an experimental setup filled with pressurized Argon gas having mean pressure of 0.45 MPa. Results show that the empirical equations reproduce the measured heat flow rates to a mutually similar degree, although their derivation processes differ. Additionally, results suggest that two effective pore radii would be necessary to account for the viscous and thermal behaviors of the gas oscillating in the stacked-screen regenerators.

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Experimental and numerical flow investigation of Stirling engine regenerator

Cited by 62 publications

References 7 publications

Alternative thermodynamic cycle for the Stirling machine

Alternative thermodynamic cycle for the Stirling machine

Numerical correlation for the pressure drop in Stirling engine heat exchangers

Measurement of Heat Flow Transmitted through a Stacked-Screen Regenerator of Thermoacoustic Engine

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