Documents disponibles écrits par cet auteur

Investigating performance of microchannel evaporators with different manifold structures / Junye Shi 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. 292-302 Titre : Investigating performance of microchannel evaporators with different manifold structures Titre original : Etude sur la performance des évaporateurs à microcanaux des collecteurs de structures différentes Type de document : texte imprimé Auteurs : Junye Shi, Auteur ; Xiaohua Qu, Auteur ; Zhaogang Qi, Auteur Année de publication : 2011 Article en page(s) : pp. 292-302 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Microchannel  evaporator  Flow  distribution  Experimentation Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this paper, the performances of microchannel evaporators with different manifold structures are experimentally investigated. Eight evaporator samples with 7 different designs of the I/O manifold and 5 different designs of the return manifold are made for this study. The performances of the evaporator samples are tested on a psychometric calorimeter test bench with the refrigerant 134A at a real automotive AC condition. The results on the variations of the cooling capacity and air temperature distribution of the evaporator due to the deflector designs in the I/O manifold and flow hole arrangements in the return manifold are presented and analyzed. By studying the KPI’s for the performance of an evaporator, the design trade-off for an evaporator designer is summarized and discussed. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001805 [article] Investigating performance of microchannel evaporators with different manifold structures = Etude sur la performance des évaporateurs à microcanaux des collecteurs de structures différentes [texte imprimé] / Junye Shi, Auteur ; Xiaohua Qu, Auteur ; Zhaogang Qi, Auteur . - 2011 . - pp. 292-302. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 292-302 Mots-clés : Microchannel  evaporator  Flow  distribution  Experimentation Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this paper, the performances of microchannel evaporators with different manifold structures are experimentally investigated. Eight evaporator samples with 7 different designs of the I/O manifold and 5 different designs of the return manifold are made for this study. The performances of the evaporator samples are tested on a psychometric calorimeter test bench with the refrigerant 134A at a real automotive AC condition. The results on the variations of the cooling capacity and air temperature distribution of the evaporator due to the deflector designs in the I/O manifold and flow hole arrangements in the return manifold are presented and analyzed. By studying the KPI’s for the performance of an evaporator, the design trade-off for an evaporator designer is summarized and discussed. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001805

Performance enhancement study of mobile air conditioning system using microchannel heat exchangers / Zhaogang Qi 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. 301-312 Titre : Performance enhancement study of mobile air conditioning system using microchannel heat exchangers Titre original : Amélioration de la performance d'un système de conditionnement d'air automobile à l'aide d'échangeurs de chaleur à microcanaux Type de document : texte imprimé Auteurs : Zhaogang Qi, Auteur ; Yu Zhao, Auteur ; Jiangping Chen, Auteur Année de publication : 2011 Article en page(s) : pp. 301-312 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Air  conditioning  Automobile  Heat  exchanger  Microchannel  R134a  Improvement  Performance Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In the present paper, two retrofitted compact and high efficient microchannel heat exchangers were proposed. The new microchannel heat exchangers have advantages in compactness (17.2% and 15.1% volume reduction for evaporator and condenser, respectively), weight (2.8% and 14.9% lighter for evaporator and condenser, respectively), heat transfer characteristics compared with the currently used heat exchangers in mobile air conditioning (MAC) industry. One enhanced and one baseline R134a MAC systems were established including the new microchannel heat exchangers and the traditional MAC heat exchangers, respectively. The system performances have been experimentally carried out under variable ambient conditions in psychrometric calorimeter test bench. The optimal system refrigerant charge amounts for both systems were tested and the results showed that the enhanced system with more compact heat exchangers could reduce system charge amount and the minimum effective charge amount was less than that of the baseline system. The enhanced system could supply more cooling capacity to car compartment under all test conditions because of higher performance heat exchangers. The coefficient of performance (COP) of the enhanced system was slightly lower than that of the baseline system under idle conditions but higher under all the other test conditions. Cooling capacity and COP of the enhanced system was increased by about 5% and 8% under high vehicle speed condition. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070070900200X [article] Performance enhancement study of mobile air conditioning system using microchannel heat exchangers = Amélioration de la performance d'un système de conditionnement d'air automobile à l'aide d'échangeurs de chaleur à microcanaux [texte imprimé] / Zhaogang Qi, Auteur ; Yu Zhao, Auteur ; Jiangping Chen, Auteur . - 2011 . - pp. 301-312. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 2 (Mars 2010) . - pp. 301-312 Mots-clés : Air  conditioning  Automobile  Heat  exchanger  Microchannel  R134a  Improvement  Performance Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In the present paper, two retrofitted compact and high efficient microchannel heat exchangers were proposed. The new microchannel heat exchangers have advantages in compactness (17.2% and 15.1% volume reduction for evaporator and condenser, respectively), weight (2.8% and 14.9% lighter for evaporator and condenser, respectively), heat transfer characteristics compared with the currently used heat exchangers in mobile air conditioning (MAC) industry. One enhanced and one baseline R134a MAC systems were established including the new microchannel heat exchangers and the traditional MAC heat exchangers, respectively. The system performances have been experimentally carried out under variable ambient conditions in psychrometric calorimeter test bench. The optimal system refrigerant charge amounts for both systems were tested and the results showed that the enhanced system with more compact heat exchangers could reduce system charge amount and the minimum effective charge amount was less than that of the baseline system. The enhanced system could supply more cooling capacity to car compartment under all test conditions because of higher performance heat exchangers. The coefficient of performance (COP) of the enhanced system was slightly lower than that of the baseline system under idle conditions but higher under all the other test conditions. Cooling capacity and COP of the enhanced system was increased by about 5% and 8% under high vehicle speed condition. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070070900200X