Experimental investigation of the refrigerant flow of isobutane (R600a) through adiabatic capillary tubes / Matthias Schenk in International journal of refrigeration, Vol. 38 (Février 2014)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 38 (Février 2014) . - pp. 275–280 Titre : Experimental investigation of the refrigerant flow of isobutane (R600a) through adiabatic capillary tubes Titre original : Etude expérimentale de l'écoulement du frigorigène isobutane (R600a) dans des tubes capillaires adiabatiques Type de document : texte imprimé Auteurs : Matthias Schenk, Auteur ; Lothar R. Oellrich, Auteur Année de publication : 2014 Article en page(s) : pp. 275–280 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Adiabatic capillary tube  R600a  Experimental results  Factorial design  Choked flow Résumé : Capillary tubes are widely used as expansion device in small scale refrigeration systems. Despite the simple geometry one finds complex physical processes during the throttling in the capillary tube, which were subject of many studies in the last decades. However, there is currently only one source of experimental data for the refrigerant isobutane (R600a) and adiabatic capillary tubes (Melo et al., 1999). In order to close this gap a test rig was built and experimental data in the range of typical small scale refrigeration systems was collected. The measured mass flow rates span from 0.64 kg h−1 to 1.93 kg h−1. Additionally, the effect of critical flows (Choked Flow) is shown by means of an extra performed test. The semi-algebraic equation from Hermes et al. (2010) showed a remarkable level of agreement by predicting 94% of all points within a ±10% error band. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002338 [article] Experimental investigation of the refrigerant flow of isobutane (R600a) through adiabatic capillary tubes = Etude expérimentale de l'écoulement du frigorigène isobutane (R600a) dans des tubes capillaires adiabatiques [texte imprimé] / Matthias Schenk, Auteur ; Lothar R. Oellrich, Auteur . - 2014 . - pp. 275–280. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 275–280 Mots-clés : Adiabatic capillary tube  R600a  Experimental results  Factorial design  Choked flow Résumé : Capillary tubes are widely used as expansion device in small scale refrigeration systems. Despite the simple geometry one finds complex physical processes during the throttling in the capillary tube, which were subject of many studies in the last decades. However, there is currently only one source of experimental data for the refrigerant isobutane (R600a) and adiabatic capillary tubes (Melo et al., 1999). In order to close this gap a test rig was built and experimental data in the range of typical small scale refrigeration systems was collected. The measured mass flow rates span from 0.64 kg h−1 to 1.93 kg h−1. Additionally, the effect of critical flows (Choked Flow) is shown by means of an extra performed test. The semi-algebraic equation from Hermes et al. (2010) showed a remarkable level of agreement by predicting 94% of all points within a ±10% error band. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713002338

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