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Experimental and simulation studies on the performance of standing wave thermoacoustic prime mover for pulse tube refrigerator / Bharatbhushan V. Kamble in International journal of refrigeration, Vol. 36 N° 8 (Décembre 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2410–2419 Titre : Experimental and simulation studies on the performance of standing wave thermoacoustic prime mover for pulse tube refrigerator Titre original : Etudes expérimentales et de simulation sur les performances des ondes stationnaires d'une force motrice thermoacoustique pour le réfrigérateur à tube à pulsations Type de document : texte imprimé Auteurs : Bharatbhushan V. Kamble, Auteur ; Biju T. Kuzhiveli, Auteur ; S. Kasthurirengan, Auteur Année de publication : 2014 Article en page(s) : pp. 2410–2419 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Standing-wave;  thermoacoustics;  prime  mover;  deltaEc;  cryocoolers;  simulation Résumé : The thermoacoustic prime mover (TAPM) has gained considerable attention as a pressure wave generator to drive pulse tube refrigerator (PTR) due to no moving parts, reasonable efficiency, use of environmental friendly working fluids etc. To drive PTCs, lower frequencies (f) with larger pressure amplitudes (ΔP) are essential, which are affected by geometric and operating parameters of TAPM as well as working fluids. For driving PTRs, a twin standing wave TAPM is built and studied by using different working fluids such as helium, argon, nitrogen and their binary mixtures. Simulation results of DeltaEc are compared with experimental data wherever possible. DeltaEc predicts slightly increased resonance frequencies, but gives larger ΔP and lower temperature difference ΔT across stack. High mass number working fluid leads to lower frequency with larger ΔP, but higher ΔT. Studies indicate that the binary gas mixture of right composition with lower ΔT can be arrived at to drive TAPM of given geometry. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002053 [article] Experimental and simulation studies on the performance of standing wave thermoacoustic prime mover for pulse tube refrigerator = Etudes expérimentales et de simulation sur les performances des ondes stationnaires d'une force motrice thermoacoustique pour le réfrigérateur à tube à pulsations [texte imprimé] / Bharatbhushan V. Kamble, Auteur ; Biju T. Kuzhiveli, Auteur ; S. Kasthurirengan, Auteur . - 2014 . - pp. 2410–2419. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2410–2419 Mots-clés : Standing-wave;  thermoacoustics;  prime  mover;  deltaEc;  cryocoolers;  simulation Résumé : The thermoacoustic prime mover (TAPM) has gained considerable attention as a pressure wave generator to drive pulse tube refrigerator (PTR) due to no moving parts, reasonable efficiency, use of environmental friendly working fluids etc. To drive PTCs, lower frequencies (f) with larger pressure amplitudes (ΔP) are essential, which are affected by geometric and operating parameters of TAPM as well as working fluids. For driving PTRs, a twin standing wave TAPM is built and studied by using different working fluids such as helium, argon, nitrogen and their binary mixtures. Simulation results of DeltaEc are compared with experimental data wherever possible. DeltaEc predicts slightly increased resonance frequencies, but gives larger ΔP and lower temperature difference ΔT across stack. High mass number working fluid leads to lower frequency with larger ΔP, but higher ΔT. Studies indicate that the binary gas mixture of right composition with lower ΔT can be arrived at to drive TAPM of given geometry. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002053

Experimental investigation of a thermoacoustic refrigerator driven by a standing wave twin thermoacoustic prime mover / N. M. Hariharan in International journal of refrigeration, Vol. 36 N° 8 (Décembre 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2420-2425 Titre : Experimental investigation of a thermoacoustic refrigerator driven by a standing wave twin thermoacoustic prime mover Titre original : Etude expérimentale sur un réfrigérateur thermoacoustique entraîné par une force motrice principale thermoacoustique à deux ondes Type de document : texte imprimé Auteurs : N. M. Hariharan, Auteur ; P. Sivashanmugam, Auteur ; S. Kasthurirengan, Auteur Année de publication : 2014 Article en page(s) : pp. 2420-2425 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Thermoacoustic  refrigerator;  twin-wave  thermoacoustic  prime  mover;  spacing;  hot  end  temperature;  temperature  difference Résumé : The objective of this study is to analyse the performance of thermoacoustic refrigerator (TAR) measured in terms of hot end temperature and temperature difference across refrigerator stack with two different spacing namely 0.4 mm and 0.8 mm and stack used in refrigerating section was made of low thermal conductivity materials namely Mylar sheet and photographic film & the experiments were carried out at 1 MPa pressure using helium as working fluid. High powered acoustic wave with frequency of 460 Hz and pressure amplitude of ≅≅0.07 MPa was obtained from twin thermoacoustic prime mover (TAPM) and this acoustic wave produced temperature difference of 16 °C across the Mylar sheet stack made of 0.4 mm spacing in refrigerator section. From this study, it has been inferred that twin TAPM can act as efficient drive for TAR. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001060 [article] Experimental investigation of a thermoacoustic refrigerator driven by a standing wave twin thermoacoustic prime mover = Etude expérimentale sur un réfrigérateur thermoacoustique entraîné par une force motrice principale thermoacoustique à deux ondes [texte imprimé] / N. M. Hariharan, Auteur ; P. Sivashanmugam, Auteur ; S. Kasthurirengan, Auteur . - 2014 . - pp. 2420-2425. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 8 (Décembre 2013) . - pp. 2420-2425 Mots-clés : Thermoacoustic  refrigerator;  twin-wave  thermoacoustic  prime  mover;  spacing;  hot  end  temperature;  temperature  difference Résumé : The objective of this study is to analyse the performance of thermoacoustic refrigerator (TAR) measured in terms of hot end temperature and temperature difference across refrigerator stack with two different spacing namely 0.4 mm and 0.8 mm and stack used in refrigerating section was made of low thermal conductivity materials namely Mylar sheet and photographic film & the experiments were carried out at 1 MPa pressure using helium as working fluid. High powered acoustic wave with frequency of 460 Hz and pressure amplitude of ≅≅0.07 MPa was obtained from twin thermoacoustic prime mover (TAPM) and this acoustic wave produced temperature difference of 16 °C across the Mylar sheet stack made of 0.4 mm spacing in refrigerator section. From this study, it has been inferred that twin TAPM can act as efficient drive for TAR. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713001060