Documents disponibles écrits par cet auteur

Heat and mass transfer enhancement for falling film absorption process by SiO2 binary nanofluids / Hyundae Kim in International journal of refrigeration, Vol. 35 N° 3 (Mai 2012) 

Public ISBD [article]  in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 645–651 Titre : Heat and mass transfer enhancement for falling film absorption process by SiO2 binary nanofluids Titre original : Amélioration du transfert de chaleur et de masse lors du processus d'absorption sur un film tombant faisant appel aux nanofluides binaires au SiO2 Type de document : texte imprimé Auteurs : Hyundae Kim, Auteur ; Jinhee Jeong, Auteur ; Yong Tae Kang, Auteur Année de publication : 2012 Article en page(s) : pp. 645–651 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Water–lithium  bromide  Distribution  Stability  Absorption  system  Enhancement Résumé : The objectives of this study are to visualize the dispersion of nano-particles in binary nanofluids, to find the effect of key parameters such as SiO2 nano-particles concentration on the distribution stability in the H2O/LiBr nanofluids, and to measure the vapor absorption rate and heat transfer rate for falling film flow of binary nanofluids. The binary nanofluids are H2O/LiBr with SiO2 nano-particle. The key parameters are the base fluid concentration of LiBr, the concentration of SiO2 nano-particles in vol%, and kinds of additives. It is found that the concentration of SiO2 nano-particles should be less than 0.01 regardless of the existence of the distribution stabilizer. It is also found that the maximum improvements of heat transfer rate and mass transfer rate reach 46.8% and 18%, respectively, when the concentration of SiO2 nano-particle is 0.005 vol%. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002982 [article] Heat and mass transfer enhancement for falling film absorption process by SiO2 binary nanofluids = Amélioration du transfert de chaleur et de masse lors du processus d'absorption sur un film tombant faisant appel aux nanofluides binaires au SiO2 [texte imprimé] / Hyundae Kim, Auteur ; Jinhee Jeong, Auteur ; Yong Tae Kang, Auteur . - 2012 . - pp. 645–651. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 3 (Mai 2012) . - pp. 645–651 Mots-clés : Water–lithium  bromide  Distribution  Stability  Absorption  system  Enhancement Résumé : The objectives of this study are to visualize the dispersion of nano-particles in binary nanofluids, to find the effect of key parameters such as SiO2 nano-particles concentration on the distribution stability in the H2O/LiBr nanofluids, and to measure the vapor absorption rate and heat transfer rate for falling film flow of binary nanofluids. The binary nanofluids are H2O/LiBr with SiO2 nano-particle. The key parameters are the base fluid concentration of LiBr, the concentration of SiO2 nano-particles in vol%, and kinds of additives. It is found that the concentration of SiO2 nano-particles should be less than 0.01 regardless of the existence of the distribution stabilizer. It is also found that the maximum improvements of heat transfer rate and mass transfer rate reach 46.8% and 18%, respectively, when the concentration of SiO2 nano-particle is 0.005 vol%. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002982

Performance analysis of double stage evaporator/absorber for a large temperature difference absorption system / Chan Woo Park in International journal of refrigeration, Vol. 33 N° 3 (Mai 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 3 (Mai 2010) . - pp. 521-528 Titre : Performance analysis of double stage evaporator/absorber for a large temperature difference absorption system Titre original : Analyse de la performance d’un évaporateur/absorbeur biétagé au sein d’un systéme á absorption á grand écart de température Type de document : texte imprimé Auteurs : Chan Woo Park, Auteur ; Yong Tae Kang, Auteur Année de publication : 2010 Article en page(s) : pp. 521-528 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Absorption  system  Water-lithium  bromide  Double-stage  system  Calculation  Performance  Coefficient  of  performance  Parameter  Temperature  difference  Chilled  water Résumé : The characteristics of double stage evaporator/absorber are studied to realize a large temperature difference absorption system. In the case of the double stage evaporator/absorber with the large temperature difference of the chilled water (15 °C/7 °C), the pressure of the lower stage in the evaporator/absorber is higher than that of the upper stage. And the concentration of the absorber for the double stage is lower than that for the single stage. If the solution flow ratio decreases with a constant concentration of strong solution of 63.7%, COP increases to 1.19 in the double stage system, which is 12.0% higher than that for the conventional system. When absorber and evaporator are divided by the same ratio, the optimum value of UAR for COP improvement is found to be 0.65.When absorber and evaporator are divided by different ratios, the optimum values of UARE and UARA are (0.6, 0.7). DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070070900231X [article] Performance analysis of double stage evaporator/absorber for a large temperature difference absorption system = Analyse de la performance d’un évaporateur/absorbeur biétagé au sein d’un systéme á absorption á grand écart de température [texte imprimé] / Chan Woo Park, Auteur ; Yong Tae Kang, Auteur . - 2010 . - pp. 521-528. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 3 (Mai 2010) . - pp. 521-528 Mots-clés : Absorption  system  Water-lithium  bromide  Double-stage  system  Calculation  Performance  Coefficient  of  performance  Parameter  Temperature  difference  Chilled  water Résumé : The characteristics of double stage evaporator/absorber are studied to realize a large temperature difference absorption system. In the case of the double stage evaporator/absorber with the large temperature difference of the chilled water (15 °C/7 °C), the pressure of the lower stage in the evaporator/absorber is higher than that of the upper stage. And the concentration of the absorber for the double stage is lower than that for the single stage. If the solution flow ratio decreases with a constant concentration of strong solution of 63.7%, COP increases to 1.19 in the double stage system, which is 12.0% higher than that for the conventional system. When absorber and evaporator are divided by the same ratio, the optimum value of UAR for COP improvement is found to be 0.65.When absorber and evaporator are divided by different ratios, the optimum values of UARE and UARA are (0.6, 0.7). DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070070900231X

The effect of oil-droplet on bubble absorption performance in binary nanoemulsions / Young-Jin Kim in International journal of refrigeration, Vol. 34 N° 8 (Décembre 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1734–1740 Titre : The effect of oil-droplet on bubble absorption performance in binary nanoemulsions : Effet des gouttelettes d'huile sur la performance en terme d'absorption bullaire Titre original : Nanoémulsions binaires Type de document : texte imprimé Auteurs : Young-Jin Kim, Auteur ; Jin Ki Lee, Auteur ; Yong Tae Kang, Auteur Année de publication : 2012 Article en page(s) : pp. 1734–1740 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Binary  mixture  Ammonia–water  Absorption  system  Emulsion  Stability  Bubble Résumé : The objectives of this paper are to study the absorption characteristics of NH3 bubbles in binary nanoemulsions and to quantify the effect of oil-droplet on the bubble absorption performance. C12E4 and Tween20 are used as the surfactants and n-decane oil is added into NH3/H2O solution to make the binary nanoemulsion. The initial concentration of NH3/H2O solution and the concentration of oil are considered as the key parameters. The absorption rates are calculated by measuring the inlet and outlet mass flow rates per a given time period. In addition, the droplet size in the binary nanoemulsion is measured by the particle size analyzer (ELS-Z, OTSUKA ELECTRONICS). It is found that the effective absorption ratio for 2.0 vol% oil and 14.3 wt% NH3/H2O becomes 17% higher than that for the base fluid. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001824 [article] The effect of oil-droplet on bubble absorption performance in binary nanoemulsions = Nanoémulsions binaires : Effet des gouttelettes d'huile sur la performance en terme d'absorption bullaire [texte imprimé] / Young-Jin Kim, Auteur ; Jin Ki Lee, Auteur ; Yong Tae Kang, Auteur . - 2012 . - pp. 1734–1740. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1734–1740 Mots-clés : Binary  mixture  Ammonia–water  Absorption  system  Emulsion  Stability  Bubble Résumé : The objectives of this paper are to study the absorption characteristics of NH3 bubbles in binary nanoemulsions and to quantify the effect of oil-droplet on the bubble absorption performance. C12E4 and Tween20 are used as the surfactants and n-decane oil is added into NH3/H2O solution to make the binary nanoemulsion. The initial concentration of NH3/H2O solution and the concentration of oil are considered as the key parameters. The absorption rates are calculated by measuring the inlet and outlet mass flow rates per a given time period. In addition, the droplet size in the binary nanoemulsion is measured by the particle size analyzer (ELS-Z, OTSUKA ELECTRONICS). It is found that the effective absorption ratio for 2.0 vol% oil and 14.3 wt% NH3/H2O becomes 17% higher than that for the base fluid. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001824