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Experimental examination of the cooling performance of Ranque-Hilsch vortex tube on the cutting tool nose point of the turret lathe through infrared thermography method / M. Selek in International journal of refrigeration, Vol. 34 N° 3 (Mai 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 3 (Mai 2011) . - pp. 807-815 Titre : Experimental examination of the cooling performance of Ranque-Hilsch vortex tube on the cutting tool nose point of the turret lathe through infrared thermography method Titre original : Etude expérimentale sur la performance en refroidissement d'un tube vortex Ranque-Hilsch sur la tête d'un outil de coupe d'un tour revolver à l'aide d'une méthode thermographique infrarouge Type de document : texte imprimé Auteurs : M. Selek, Auteur ; S. Tasdemir, Auteur ; K. Dincer, Auteur Année de publication : 2011 Article en page(s) : pp. 807-815 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Ranque-Hilsch  Tube  Vortex  Image  Thermography  Infrared Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In the present study, the cooling performance of the Ranque-Hilsch Vortex tube (RHVT) was experimentally investigated by infrared thermography (IRT) method. For this purpose, experiments were conducted on the cutting tool nose point of the lathe at different diameters, cutting speeds and cutting depths for cases in which cooling was not performed and RHTV cooling was performed. The sample material was gray cast iron in the form of round bars with 15 mm and 20 mm diameter respectively and 100 mm length. The inserts were manufactured by Sandvik Inc., with the ISO designation of TNMG 160404 MF (Triangular insert). The inserts were rigidly mounted on three different right hand style tool holders designated by ISO as MTJNR-L2020 K16T. In all instances, the side rake angle and back rake angle are 0° and fixed. The performance of RHVT was determined by using the temperatures obtained from thermal images (TIs). TIs were taken from the FLIR E45 infrared camera at 30 frames per second. When all the experimental results were evaluated together, the maximum performance of RHVT was found to be for a diameter of sample = 15 mm; cutting depth = 3 mm; cutting speed = 800 rpm (P15,3,800). DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002690 [article] Experimental examination of the cooling performance of Ranque-Hilsch vortex tube on the cutting tool nose point of the turret lathe through infrared thermography method = Etude expérimentale sur la performance en refroidissement d'un tube vortex Ranque-Hilsch sur la tête d'un outil de coupe d'un tour revolver à l'aide d'une méthode thermographique infrarouge [texte imprimé] / M. Selek, Auteur ; S. Tasdemir, Auteur ; K. Dincer, Auteur . - 2011 . - pp. 807-815. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 3 (Mai 2011) . - pp. 807-815 Mots-clés : Ranque-Hilsch  Tube  Vortex  Image  Thermography  Infrared Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In the present study, the cooling performance of the Ranque-Hilsch Vortex tube (RHVT) was experimentally investigated by infrared thermography (IRT) method. For this purpose, experiments were conducted on the cutting tool nose point of the lathe at different diameters, cutting speeds and cutting depths for cases in which cooling was not performed and RHTV cooling was performed. The sample material was gray cast iron in the form of round bars with 15 mm and 20 mm diameter respectively and 100 mm length. The inserts were manufactured by Sandvik Inc., with the ISO designation of TNMG 160404 MF (Triangular insert). The inserts were rigidly mounted on three different right hand style tool holders designated by ISO as MTJNR-L2020 K16T. In all instances, the side rake angle and back rake angle are 0° and fixed. The performance of RHVT was determined by using the temperatures obtained from thermal images (TIs). TIs were taken from the FLIR E45 infrared camera at 30 frames per second. When all the experimental results were evaluated together, the maximum performance of RHVT was found to be for a diameter of sample = 15 mm; cutting depth = 3 mm; cutting speed = 800 rpm (P15,3,800). DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710002690

Experimental investigation and exergy analysis of the performance of a counter flow Ranque–Hilsch vortex tube with regard to nozzle cross-section areas / K. Dincer in International journal of refrigeration, Vol. 33 N° 5 (Août 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 5 (Août 2010) . - pp. 954-962 Titre : Experimental investigation and exergy analysis of the performance of a counter flow Ranque–Hilsch vortex tube with regard to nozzle cross-section areas Titre original : Etude expérimentale et analyse exergétique de la performance d'un tube vortex Ranque-Hilsch à contre-courant portant sur les coupes des tuyères Type de document : texte imprimé Auteurs : K. Dincer, Auteur ; A. Avci, Auteur ; S. Baskaya, Auteur Année de publication : 2010 Article en page(s) : pp. 954-962 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Refrigeration  system  Vortex  tube  Ranque  Hilsch  Experiment  Exergy  Performance  Efficiency  Parameter  Geometry  Nozzle Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Exergy analysis and performance of a Ranque–Hilsch Vortex Tube (RHVT) with various nozzle cross-section areas (NCSA = 3 × 3, 4 × 4, 5 × 5 mm2) were determined under inlet pressures (Pi) of 260, 300 kPa (absolute) pressurized air. The maximum difference in the temperatures of hot output and cold output streams was obtained for NCSA = 3 × 3 mm2. The total inlet exergy View the MathML source, total outlet exergy View the MathML source, total lost exergy View the MathML source and exergy efficiency (η, %) were calculated. It was determined that the exergy efficiency of the system, varied between 1% and 39%, and the highest exergy efficiency was obtained for NCSA = 3 × 3 mm2. The exergy efficiency strongly depends on the level of Pi, ξ and vcold. Variation of the exergy efficiency decreased with decreasing Pi, ξ, vcold and the highest and lowest exergy efficiencies were found when the values of Pi, ξ, vcold reached maximum and minimum levels, respectively. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000708 [article] Experimental investigation and exergy analysis of the performance of a counter flow Ranque–Hilsch vortex tube with regard to nozzle cross-section areas = Etude expérimentale et analyse exergétique de la performance d'un tube vortex Ranque-Hilsch à contre-courant portant sur les coupes des tuyères [texte imprimé] / K. Dincer, Auteur ; A. Avci, Auteur ; S. Baskaya, Auteur . - 2010 . - pp. 954-962. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 5 (Août 2010) . - pp. 954-962 Mots-clés : Refrigeration  system  Vortex  tube  Ranque  Hilsch  Experiment  Exergy  Performance  Efficiency  Parameter  Geometry  Nozzle Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Exergy analysis and performance of a Ranque–Hilsch Vortex Tube (RHVT) with various nozzle cross-section areas (NCSA = 3 × 3, 4 × 4, 5 × 5 mm2) were determined under inlet pressures (Pi) of 260, 300 kPa (absolute) pressurized air. The maximum difference in the temperatures of hot output and cold output streams was obtained for NCSA = 3 × 3 mm2. The total inlet exergy View the MathML source, total outlet exergy View the MathML source, total lost exergy View the MathML source and exergy efficiency (η, %) were calculated. It was determined that the exergy efficiency of the system, varied between 1% and 39%, and the highest exergy efficiency was obtained for NCSA = 3 × 3 mm2. The exergy efficiency strongly depends on the level of Pi, ξ and vcold. Variation of the exergy efficiency decreased with decreasing Pi, ξ, vcold and the highest and lowest exergy efficiencies were found when the values of Pi, ξ, vcold reached maximum and minimum levels, respectively. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000708

Experimental investigation of performance of hot cascade type Ranque–Hilsch vortex tube and exergy analysis / K. Dincer in International journal of refrigeration, Vol. 34 N° 4 (Juin 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1117-1124 Titre : Experimental investigation of performance of hot cascade type Ranque–Hilsch vortex tube and exergy analysis Titre original : Etude expérimentale sur la performance d'un tube vortex de type Ranque-Hilsch en cascade chaud et analyse de l'exergie Type de document : texte imprimé Auteurs : K. Dincer, Auteur ; Y. Yilmaz, Auteur ; A. Berber, Auteur Année de publication : 2011 Article en page(s) : pp. 1117-1124 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Ranque-Hilsch  Vortex  tube  Experiment  Exergy  Efficiency  geometry Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this study, three Ranque–Hilsch vortex tubes were used, which have 9 mm inside diameter and length/diameter ratio was 15. Their performances were examined as one of the classical RHVT and other was hot cascade type RHVT. Performance analysis was according to temperature difference between the hot outlet and the inlet (ΔThot.). The ΔThot values of hot cascade type Ranque–Hilsch vortex tubes were greater than the ΔThot values of classical RHVT, which were determined experimentally. The total inlet exergy, total outlet exergy, total lost exergy and exergy efficiency of hot stream were investigated by using experimental data. In both the classical RHVT and hot cascade type RHVT, it was found that as fraction of cold flow increases the total lost exergy decreases. It was also found that, the hot cascade type RHVT more exergy efficiency of hot outlet than the classical RHVT. Excess ΔThot value of hot cascade type Ranque–Hilsch vortex tube causes the excess exergy efficiency of hot outlet. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000326 [article] Experimental investigation of performance of hot cascade type Ranque–Hilsch vortex tube and exergy analysis = Etude expérimentale sur la performance d'un tube vortex de type Ranque-Hilsch en cascade chaud et analyse de l'exergie [texte imprimé] / K. Dincer, Auteur ; Y. Yilmaz, Auteur ; A. Berber, Auteur . - 2011 . - pp. 1117-1124. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 1117-1124 Mots-clés : Ranque-Hilsch  Vortex  tube  Experiment  Exergy  Efficiency  geometry Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In this study, three Ranque–Hilsch vortex tubes were used, which have 9 mm inside diameter and length/diameter ratio was 15. Their performances were examined as one of the classical RHVT and other was hot cascade type RHVT. Performance analysis was according to temperature difference between the hot outlet and the inlet (ΔThot.). The ΔThot values of hot cascade type Ranque–Hilsch vortex tubes were greater than the ΔThot values of classical RHVT, which were determined experimentally. The total inlet exergy, total outlet exergy, total lost exergy and exergy efficiency of hot stream were investigated by using experimental data. In both the classical RHVT and hot cascade type RHVT, it was found that as fraction of cold flow increases the total lost exergy decreases. It was also found that, the hot cascade type RHVT more exergy efficiency of hot outlet than the classical RHVT. Excess ΔThot value of hot cascade type Ranque–Hilsch vortex tube causes the excess exergy efficiency of hot outlet. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000326

Modelling of a thermal insulation system based on the coldest temperature conditions by using artificial neural networks to determine performance of building for wall types in Turkey / M. Tosun 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. 362-373 Titre : Modelling of a thermal insulation system based on the coldest temperature conditions by using artificial neural networks to determine performance of building for wall types in Turkey Titre original : Modélisation d'un système d'isolation thermique fondée sur les températures les plus froides, à l'aide de réseaux neuronaux artificiels, afin de déterminer la performance de plusieurs types de murs d'immeubles en Turquie Type de document : texte imprimé Auteurs : M. Tosun, Auteur ; K. Dincer, Auteur Année de publication : 2011 Article en page(s) : pp. 362-373 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Insulation  Thermal  analysis  Wall  Building  Cooling  Neural  network Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In formation of building external envelope, as two important criteria, climatic data and wall types must be taken into consideration. In the selection of wall type, the thickness of thermal insulation layer (di) must be calculated. As a new approach, this study proposes determining the thermal insulation layer by using artificial neural network (ANN) technique. In this technique five different wall types in four different climatic regions in Turkey have been selected. The ANN was trained and tested by using MATLAB toolbox on a personal computer. As ANN input parameters, Uw, Te,Met, Te,TSE, Rwt, and qTSE were used, while di was the output parameter. It was found that the maximum mean absolute percentage error (MRE, %) is less than 7.658%. R2 (%) for the training data were found ranging about from 99.68 to 99.98 and R2 for the testing data varied between 97.55 and 99.96. These results show that ANN model can be used as a reliable modeling method of di studies. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001738 [article] Modelling of a thermal insulation system based on the coldest temperature conditions by using artificial neural networks to determine performance of building for wall types in Turkey = Modélisation d'un système d'isolation thermique fondée sur les températures les plus froides, à l'aide de réseaux neuronaux artificiels, afin de déterminer la performance de plusieurs types de murs d'immeubles en Turquie [texte imprimé] / M. Tosun, Auteur ; K. Dincer, Auteur . - 2011 . - pp. 362-373. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 362-373 Mots-clés : Insulation  Thermal  analysis  Wall  Building  Cooling  Neural  network Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : In formation of building external envelope, as two important criteria, climatic data and wall types must be taken into consideration. In the selection of wall type, the thickness of thermal insulation layer (di) must be calculated. As a new approach, this study proposes determining the thermal insulation layer by using artificial neural network (ANN) technique. In this technique five different wall types in four different climatic regions in Turkey have been selected. The ANN was trained and tested by using MATLAB toolbox on a personal computer. As ANN input parameters, Uw, Te,Met, Te,TSE, Rwt, and qTSE were used, while di was the output parameter. It was found that the maximum mean absolute percentage error (MRE, %) is less than 7.658%. R2 (%) for the training data were found ranging about from 99.68 to 99.98 and R2 for the testing data varied between 97.55 and 99.96. These results show that ANN model can be used as a reliable modeling method of di studies. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001738