Displacer gap losses in beta and gamma Stirling engines

Abstract : An analytical model has been developed to evaluate displacer gap losses in the clearance between the displacer and the cylinder in both β and γ configurations of Stirling engines. Displacer gap losses are the sum of the "shuttle heat transfer" and the "enthalpy pumping". The present model takes into account the pressure gradient in the gap, the gas compressibility and real gas effect. Gas velocity and temperature distributions in the displacer, in the gap and in the cylinder were determined by solving momentum and energy balances in a concentric tubes geometry. Our model is then introduced in a whole engine model and the effect of the clearance thickness and engine's speed on total displacer gap losses are investigated. Novel tendencies of the solution are observed and new ways for optimization are demonstrated.
Keywords : Stirling engine
Type de document :
Article dans une revue
Energy, Elsevier, 2014, 72, pp.135 - 144. 〈10.1016/j.energy.2014.05.017〉
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https://hal.univ-lorraine.fr/hal-01418378
Contributeur : Lemta Ul <>
Soumis le : vendredi 16 décembre 2016 - 16:27:06
Dernière modification le : jeudi 11 janvier 2018 - 06:27:33

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Mohamed Tahar Mabrouk, Abdelhamid Kheiri, Michel Feidt. Displacer gap losses in beta and gamma Stirling engines. Energy, Elsevier, 2014, 72, pp.135 - 144. 〈10.1016/j.energy.2014.05.017〉. 〈hal-01418378〉

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