Documents disponibles écrits par cet auteur

Analytical study of the endface friction of the revolving vane mechanism / A. Subiantoro in International journal of refrigeration, Vol. 34 N° 5 (Août 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1276-1285 Titre : Analytical study of the endface friction of the revolving vane mechanism Titre original : Etude analytique du frottement sur la surface de contact, d'une machine rotative à cylindre tournant Type de document : texte imprimé Auteurs : A. Subiantoro, Auteur ; K.T. Ooi, Auteur Année de publication : 2011 Article en page(s) : pp. 1276-1285 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Desorption  Miniaturization  Mass  transfer  Microchannel  Heat  pump Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The effects of the fluid friction acting on the endfaces of the revolving vane (RV) machine, where the cylinder rotates together with the rotor, are investigated analytically with closed form solutions. It was found that the endface losses of the RV machine are generally affected by both the relative velocity and the eccentricity between the rotor and the cylinder. The endface loss of an RV machine with the simply supported bearing arrangement is found to be always lower than that with the cantilever arrangement. When compared to a similar rotary machine but with a stationary cylinder, the RV machine used in this study exhibits a 95% decrease in the endface loss, while in the wider practical dimensions range, an RV machine consistently shows at least a 50% lower in endface loss. These findings supply more proof to the claim of the suitability of the employment of the RV mechanism in high-speed and high-pressure applications. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071100034X [article] Analytical study of the endface friction of the revolving vane mechanism = Etude analytique du frottement sur la surface de contact, d'une machine rotative à cylindre tournant [texte imprimé] / A. Subiantoro, Auteur ; K.T. Ooi, Auteur . - 2011 . - pp. 1276-1285. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 5 (Août 2011) . - pp. 1276-1285 Mots-clés : Desorption  Miniaturization  Mass  transfer  Microchannel  Heat  pump Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The effects of the fluid friction acting on the endfaces of the revolving vane (RV) machine, where the cylinder rotates together with the rotor, are investigated analytically with closed form solutions. It was found that the endface losses of the RV machine are generally affected by both the relative velocity and the eccentricity between the rotor and the cylinder. The endface loss of an RV machine with the simply supported bearing arrangement is found to be always lower than that with the cantilever arrangement. When compared to a similar rotary machine but with a stationary cylinder, the RV machine used in this study exhibits a 95% decrease in the endface loss, while in the wider practical dimensions range, an RV machine consistently shows at least a 50% lower in endface loss. These findings supply more proof to the claim of the suitability of the employment of the RV mechanism in high-speed and high-pressure applications. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S014070071100034X

Design analysis of the novel Revolving Vane expander in a transcritical carbon dioxide refrigeration system / A. Subiantoro in International journal of refrigeration, Vol. 33 N° 4 (Juin 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 675-685 Titre : Design analysis of the novel Revolving Vane expander in a transcritical carbon dioxide refrigeration system Titre original : Analyse de la conception d’un détendeur rotatif à palettes dans un système frigorifique au dioxyde de carbone transcritique Type de document : texte imprimé Auteurs : A. Subiantoro, Auteur ; K.T. Ooi, Auteur Année de publication : 2010 Article en page(s) : pp. 675-685 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Design  Rotary  compressor  Carbon  dioxide  Review  Performance  Expansion Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this paper, four possible design variants of the Revolving Vane expander have been examined in relation to their application when using CO2 as the working fluid in a refrigeration cycle. The detailed examination of the design components and illustrations are presented and discussed. The study shows that the Revolving Vane expander RV-I design configuration with the vane attached to the rotor and in which the rotor is also used as the driving component is the most superior design. It is found to have the highest mechanical efficiency and the most desirable variation of the power produced. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000046 [article] Design analysis of the novel Revolving Vane expander in a transcritical carbon dioxide refrigeration system = Analyse de la conception d’un détendeur rotatif à palettes dans un système frigorifique au dioxyde de carbone transcritique [texte imprimé] / A. Subiantoro, Auteur ; K.T. Ooi, Auteur . - 2010 . - pp. 675-685. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 4 (Juin 2010) . - pp. 675-685 Mots-clés : Design  Rotary  compressor  Carbon  dioxide  Review  Performance  Expansion Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this paper, four possible design variants of the Revolving Vane expander have been examined in relation to their application when using CO2 as the working fluid in a refrigeration cycle. The detailed examination of the design components and illustrations are presented and discussed. The study shows that the Revolving Vane expander RV-I design configuration with the vane attached to the rotor and in which the rotor is also used as the driving component is the most superior design. It is found to have the highest mechanical efficiency and the most desirable variation of the power produced. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000046

Journal bearings design for a novel revolving vane compressor / K.M. Tan 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. 94-104 Titre : Journal bearings design for a novel revolving vane compressor Titre original : Conception des paliers lisses pour un nouveau compresseur à palettes rotatives Type de document : texte imprimé Auteurs : K.M. Tan, Auteur ; K.T. Ooi, Auteur Année de publication : 2011 Article en page(s) : pp. 94-104 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Air  conditioning  Bearing  Design  Compressor  Performance Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper presents the theoretical details of the journal bearing design for Revolving Vane (RV) rotary type compressor. The mathematical models, force analysis, and the theoretical design analysis for the dynamically loaded journal bearing of the compressor are presented. The variations of the minimum oil film thickness and the maximum film pressure developed are shown and the influences of design parameters, compressor configurations, and operating conditions on the journal bearing performance are described. For an air-conditioning compressor of 1.5 kW cooling capacity, the lowest minimum oil film thickness for lower and upper journal bearings is 6.6 μm and 4.3 μm respectively, when the cylinder is simply supported and the rotor is cantilever-supported. The lowest minimum oil film thickness for the journal bearing, which supports the cylinder, reduces to 4.0 μm if the cantilever-type support is used. Besides that, a short-fat configuration of RV compressor is favorable in the interest of lowering bearing forces. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001842 [article] Journal bearings design for a novel revolving vane compressor = Conception des paliers lisses pour un nouveau compresseur à palettes rotatives [texte imprimé] / K.M. Tan, Auteur ; K.T. Ooi, Auteur . - 2011 . - pp. 94-104. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 94-104 Mots-clés : Air  conditioning  Bearing  Design  Compressor  Performance Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : This paper presents the theoretical details of the journal bearing design for Revolving Vane (RV) rotary type compressor. The mathematical models, force analysis, and the theoretical design analysis for the dynamically loaded journal bearing of the compressor are presented. The variations of the minimum oil film thickness and the maximum film pressure developed are shown and the influences of design parameters, compressor configurations, and operating conditions on the journal bearing performance are described. For an air-conditioning compressor of 1.5 kW cooling capacity, the lowest minimum oil film thickness for lower and upper journal bearings is 6.6 μm and 4.3 μm respectively, when the cylinder is simply supported and the rotor is cantilever-supported. The lowest minimum oil film thickness for the journal bearing, which supports the cylinder, reduces to 4.0 μm if the cantilever-type support is used. Besides that, a short-fat configuration of RV compressor is favorable in the interest of lowering bearing forces. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001842

A novel revolving vane compressor with a fixed-vane / K.M. Tan 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. 1980–1988 Titre : A novel revolving vane compressor with a fixed-vane Titre original : Nouveau compresseur rotatif à palettes muni d'une palette fixe Type de document : texte imprimé Auteurs : K.M. Tan, Auteur ; K.T. Ooi, Auteur Année de publication : 2012 Article en page(s) : pp. 1980–1988 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Design  Rotary  compressor  Efficiency  Friction Résumé : This paper presents design improvements of a Revolving Vane (RV) compressor which significantly reduce the frictional losses. The original RV compressor has a vane that swivels during the operation. Though in general, the frictional losses of the RV compressor are significantly lower than most currently available rotary compressors, this swivel vane design has a disadvantage of relatively high vane side friction loss. The latter is caused by a high vane-side and slot contact force due to a high gas pressure differential force across the vane. In this paper, a new design concept has been introduced to totally eliminate the vane side friction loss caused by the gas pressure differential force across the vane. This is achieved by rigidly fixes the vane onto the rotor or the cylinder. This new design yielded two possible variants, each reduces the frictional losses by 18% and 41% and improves the mechanical efficiency from 93% to 94% and 96% respectively. In this paper, details analysis on the new design that leads to the improvement in performance are presented and shown. The analysis also reveals that the design with the highest mechanical efficiency comes with a small price of a higher instantaneous peak torque requirement. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001551 [article] A novel revolving vane compressor with a fixed-vane = Nouveau compresseur rotatif à palettes muni d'une palette fixe [texte imprimé] / K.M. Tan, Auteur ; K.T. Ooi, Auteur . - 2012 . - pp. 1980–1988. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1980–1988 Mots-clés : Design  Rotary  compressor  Efficiency  Friction Résumé : This paper presents design improvements of a Revolving Vane (RV) compressor which significantly reduce the frictional losses. The original RV compressor has a vane that swivels during the operation. Though in general, the frictional losses of the RV compressor are significantly lower than most currently available rotary compressors, this swivel vane design has a disadvantage of relatively high vane side friction loss. The latter is caused by a high vane-side and slot contact force due to a high gas pressure differential force across the vane. In this paper, a new design concept has been introduced to totally eliminate the vane side friction loss caused by the gas pressure differential force across the vane. This is achieved by rigidly fixes the vane onto the rotor or the cylinder. This new design yielded two possible variants, each reduces the frictional losses by 18% and 41% and improves the mechanical efficiency from 93% to 94% and 96% respectively. In this paper, details analysis on the new design that leads to the improvement in performance are presented and shown. The analysis also reveals that the design with the highest mechanical efficiency comes with a small price of a higher instantaneous peak torque requirement. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001551