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Etude expérimentale et modélisation de la compression quasi isotherme d’air pour le stockage d’énergie en mer

Abstract : Energy storage by compressed air would be one of the required technologies for enabling massive use of intermittent solar or wind renewable energy sources. Air compression using a liquid piston enables an increase in the energy storage efficiency by inducing an intense heat exchange in the compression chamber. Few studies reported in the literature have focused on the description and evaluation of the convective heat exchange for a low ratio compression chamber (L/D). Using an experimental study and two test benches, the internal convective heat transfer during compression has been studied. In addition to measuring liquid piston position and air pressure, an inverse method was used to determine the instantaneous parietal convective heat flow during compression. After highlighting the presence of a systematic transition from laminar to turbulent convective regime in the compressed air, new convective heat transfer correlations were sought. On the basis of 73 experiments, several correlation forms based on dimensionless numbers were optimized and compared. Two new Nusselt number correlations, one for laminar and the other for turbulent flow, were then selected. A 1D thermodynamic transient model of the compression chamber was built using Matlab / Simulink environment in order to test the quality of these correlations. Thus, numerical results and experimental data were compared. Finally, results from two additional experiments carried out on a different test bench have confirmed the quality of the new proposed correlations for convective heat exchange.
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2017IMTA0021_Neu_Thibault.pdf
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  • HAL Id : tel-01674267, version 1

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Thibault Neu. Etude expérimentale et modélisation de la compression quasi isotherme d’air pour le stockage d’énergie en mer. Thermique [physics.class-ph]. Ecole nationale supérieure Mines-Télécom Atlantique, 2017. Français. ⟨NNT : 2017IMTA0021⟩. ⟨tel-01674267⟩

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