Documents disponibles écrits par cet auteur

Thermodynamic analysis and optimization of a novel two-stage transcritical N2O cycle / Neeraj Agrawal 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. 991-999 Titre : Thermodynamic analysis and optimization of a novel two-stage transcritical N2O cycle Titre original : Analyse thermodynamique et optimisation d'un nouveau cycle au N2O biétagé transcritique Type de document : texte imprimé Auteurs : Neeraj Agrawal, Auteur ; Jahar Sarkar, Auteur ; Souvik Bhattacharyya, Auteur Année de publication : 2011 Article en page(s) : pp. 991-999 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Carbon  dioxide  Nitrous  oxide  Two-stage  system  Inter-stage  pressure  Exergy  Optimisation Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Thermodynamic (energy and exergy) analyses and optimization studies of two-stage transcritical N2O and CO2 cycles, incorporating compressor intercooling, are presented based on cycle simulation employing simultaneous optimization of intercooler pressure and gas cooler pressure. Further, performance comparisons with the basic single-stage cycles are also presented. The N2O cycle exhibits higher cooling COP, lower optimum gas cooler pressure and discharge temperature and higher second law efficiency as compared to an equivalent CO2 cycle. However, two-stage compression with intercooling yields lesser COP improvement for N2O compared to CO2. Based on the cycle simulations, correlations of optimum gas cooler pressure and inter-stage pressure in terms of gas cooler exit temperature and evaporator temperature are obtained. This is expected to be of help as a guideline in optimal design and operation of such systems. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000284 [article] Thermodynamic analysis and optimization of a novel two-stage transcritical N2O cycle = Analyse thermodynamique et optimisation d'un nouveau cycle au N2O biétagé transcritique [texte imprimé] / Neeraj Agrawal, Auteur ; Jahar Sarkar, Auteur ; Souvik Bhattacharyya, Auteur . - 2011 . - pp. 991-999. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 4 (Juin 2011) . - pp. 991-999 Mots-clés : Carbon  dioxide  Nitrous  oxide  Two-stage  system  Inter-stage  pressure  Exergy  Optimisation Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Thermodynamic (energy and exergy) analyses and optimization studies of two-stage transcritical N2O and CO2 cycles, incorporating compressor intercooling, are presented based on cycle simulation employing simultaneous optimization of intercooler pressure and gas cooler pressure. Further, performance comparisons with the basic single-stage cycles are also presented. The N2O cycle exhibits higher cooling COP, lower optimum gas cooler pressure and discharge temperature and higher second law efficiency as compared to an equivalent CO2 cycle. However, two-stage compression with intercooling yields lesser COP improvement for N2O compared to CO2. Based on the cycle simulations, correlations of optimum gas cooler pressure and inter-stage pressure in terms of gas cooler exit temperature and evaporator temperature are obtained. This is expected to be of help as a guideline in optimal design and operation of such systems. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711000284