Documents disponibles écrits par cet auteur

Air-side heat transfer characteristics of spiral-type circular fin-tube heat exchangers / Mooyeon Lee in International journal of refrigeration, Vol. 33 N° 2 (Mars 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 2 (Mars 2010) . - pp. 313-320 Titre : Air-side heat transfer characteristics of spiral-type circular fin-tube heat exchangers Titre original : Caractéristiques de transfert de chaleur côté air des échangeurs de chaleur circulaires hélicoïdaux à tubes ailetés Type de document : texte imprimé Auteurs : Mooyeon Lee, Auteur ; Taehyung Kang, Auteur ; Yongchan Kim, Auteur Année de publication : 2011 Article en page(s) : pp. 313-320 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Chiller  Heat  exchanger  Finned  tube  Spiral  Geometry  Experiment  Heat  transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The objective of this study is to investigate the air-side heat transfer characteristics of spiral-type circular fin-tube heat exchangers used as evaporators in household refrigerators. The j-factors of the tested heat exchangers under non-frosting conditions were measured by varying the fin pitch, number of tube rows, and fin alignment. The j-factors of the spiral-type circular fin-tube heat exchangers were analyzed as a function of heat exchanger geometries and then compared with those of the flat plate fin-tube heat exchangers with discrete fins. Two empirical correlations of the j-factors were developed separately for the inline and the staggered fin alignment as a function of the Reynolds number, number of tube rows, and dimensionless fin pitch normalized by the hydraulic diameter. The mean deviation of the predictions using the present correlations from the measured data was 4.78% for the inline fin alignment and 6.02% for the staggered fin alignment. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709002308 [article] Air-side heat transfer characteristics of spiral-type circular fin-tube heat exchangers = Caractéristiques de transfert de chaleur côté air des échangeurs de chaleur circulaires hélicoïdaux à tubes ailetés [texte imprimé] / Mooyeon Lee, Auteur ; Taehyung Kang, Auteur ; Yongchan Kim, Auteur . - 2011 . - pp. 313-320. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 2 (Mars 2010) . - pp. 313-320 Mots-clés : Chiller  Heat  exchanger  Finned  tube  Spiral  Geometry  Experiment  Heat  transfer Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The objective of this study is to investigate the air-side heat transfer characteristics of spiral-type circular fin-tube heat exchangers used as evaporators in household refrigerators. The j-factors of the tested heat exchangers under non-frosting conditions were measured by varying the fin pitch, number of tube rows, and fin alignment. The j-factors of the spiral-type circular fin-tube heat exchangers were analyzed as a function of heat exchanger geometries and then compared with those of the flat plate fin-tube heat exchangers with discrete fins. Two empirical correlations of the j-factors were developed separately for the inline and the staggered fin alignment as a function of the Reynolds number, number of tube rows, and dimensionless fin pitch normalized by the hydraulic diameter. The mean deviation of the predictions using the present correlations from the measured data was 4.78% for the inline fin alignment and 6.02% for the staggered fin alignment. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709002308

Heat transfer characteristics of spirally-coiled circular fin-tube heat exchangers operating under frosting conditions / Mooyeon Lee in International journal of refrigeration, Vol. 34 N° 1 (Janvier 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 328-336 Titre : Heat transfer characteristics of spirally-coiled circular fin-tube heat exchangers operating under frosting conditions Titre original : Caractéristiques de transfert de chaleur des échangeurs de chaleur spiralés avec tubes ailetés circulaires fonctionnant sous des conditions de givrage Type de document : texte imprimé Auteurs : Mooyeon Lee, Auteur ; Taehyung Kang, Auteur ; Youngju Joo, Auteur Année de publication : 2011 Article en page(s) : pp. 328-336 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Heat  transfer  Heat  exchanger  Correlation  Frosting  Pressure  drop Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The objective of this study is to investigate the heat transfer characteristics of spirally-coiled circular fin-tube heat exchangers under frosting conditions. The heat transfer rate, pressure drop, frost thickness, and Nusselt number of the heat exchanger were measured and analyzed by varying the fin pitch and number of tube rows under frosting conditions. In addition, the Nusselt number of the spirally-coiled circular fin-tube exchanger was compared with those of flat plate fin-tube heat exchangers with discrete fins. An empirical correlation of the Nusselt number was developed as a function of the Reynolds number, dimensionless fin pitch normalized by the hydraulic diameter, i.e., Dh/Fp, Fourier number, and number of tube rows. The measured Nusselt number was consistent with the predicted value with mean and average deviations of 3.5% and 0.3%, respectively. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001854 [article] Heat transfer characteristics of spirally-coiled circular fin-tube heat exchangers operating under frosting conditions = Caractéristiques de transfert de chaleur des échangeurs de chaleur spiralés avec tubes ailetés circulaires fonctionnant sous des conditions de givrage [texte imprimé] / Mooyeon Lee, Auteur ; Taehyung Kang, Auteur ; Youngju Joo, Auteur . - 2011 . - pp. 328-336. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 328-336 Mots-clés : Heat  transfer  Heat  exchanger  Correlation  Frosting  Pressure  drop Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The objective of this study is to investigate the heat transfer characteristics of spirally-coiled circular fin-tube heat exchangers under frosting conditions. The heat transfer rate, pressure drop, frost thickness, and Nusselt number of the heat exchanger were measured and analyzed by varying the fin pitch and number of tube rows under frosting conditions. In addition, the Nusselt number of the spirally-coiled circular fin-tube exchanger was compared with those of flat plate fin-tube heat exchangers with discrete fins. An empirical correlation of the Nusselt number was developed as a function of the Reynolds number, dimensionless fin pitch normalized by the hydraulic diameter, i.e., Dh/Fp, Fourier number, and number of tube rows. The measured Nusselt number was consistent with the predicted value with mean and average deviations of 3.5% and 0.3%, respectively. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001854