Documents disponibles écrits par cet auteur

Multivariable self-tuning control of a turbine generator system / Zachariah, K. J. in IEEE transactions on energy conversion, Vol. 24 N° 2 (Juin 2009) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 24 N° 2 (Juin 2009) . - pp. 406 - 414 Titre : Multivariable self-tuning control of a turbine generator system Type de document : texte imprimé Auteurs : Zachariah, K. J., Auteur ; Finch, John W., Auteur ; Mohammad Farsi, Auteur Année de publication : 2009 Article en page(s) : pp. 406 - 414 Note générale : energy energy Langues : Anglais (eng) Mots-clés : Predictive  control;  self-adjusting  systems;  turbogenerators;  voltage  regulators Résumé : Results from a collaborative research and development program devoted to turbine generator (TG) control are described. Digital self-tuning excitation controllers were designed for a generator during the initial phase of the project, with the design subsequently extended to cover multivariable control of the TG, which is the topic of this paper. Simulations and tests on a laboratory-scale machine have been accomplished successfully and a prototype multivariable self-tuning controller has been built. A set of typical results is given, covering responses to fault conditions of the power system. The multivariable self-tuning controller is shown to have good potential for commercial use for the TG. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4957573&sortType%3Das [...] [article] Multivariable self-tuning control of a turbine generator system [texte imprimé] / Zachariah, K. J., Auteur ; Finch, John W., Auteur ; Mohammad Farsi, Auteur . - 2009 . - pp. 406 - 414. energy energy Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 2 (Juin 2009) . - pp. 406 - 414 Mots-clés : Predictive  control;  self-adjusting  systems;  turbogenerators;  voltage  regulators Résumé : Results from a collaborative research and development program devoted to turbine generator (TG) control are described. Digital self-tuning excitation controllers were designed for a generator during the initial phase of the project, with the design subsequently extended to cover multivariable control of the TG, which is the topic of this paper. Simulations and tests on a laboratory-scale machine have been accomplished successfully and a prototype multivariable self-tuning controller has been built. A set of typical results is given, covering responses to fault conditions of the power system. The multivariable self-tuning controller is shown to have good potential for commercial use for the TG. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4957573&sortType%3Das [...]

Novel recuperative configuration for coupling of methanol dehydration to dimethyl ether with cyclohexane dehydrogenation to benzene / Mohammad Farsi in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4633–4643 Titre : Novel recuperative configuration for coupling of methanol dehydration to dimethyl ether with cyclohexane dehydrogenation to benzene Type de document : texte imprimé Auteurs : Mohammad Farsi, Auteur ; Mohammad H. Khademi, Auteur ; Abdolhosein Jahanmiri, Auteur Année de publication : 2010 Article en page(s) : pp. 4633–4643 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Methanol Résumé : Coupling energy intensive endothermic reaction systems with suitable exothermic reactions improves the thermal efficiency of processes and reduces the size of reactors. One type of reactor suitable for such a type of coupling is the recuperative reactor. In this work, the catalytic methanol dehydration to dimethyl ether (DME) is coupled with the catalytic dehydrogenation of cyclohexane to benzene in a simulated integrated reactor formed of two fixed beds separated by a wall, where heat is transferred across the surface of tube. A steady state heterogeneous model of the two fixed beds predicts the performance of this novel configuration. The cocurrent mode is investigated, and the simulation results are compared with corresponding predictions for an industrial adiabatic methanol dehydration fixed-bed reactor operated at the same feed conditions. In this coupled reactor, benzene and hydrogen are also produced as additional valuable products in a favorable manner and autothermality is achieved within the reactor. This novel configuration can decrease the temperature of methanol dehydration reaction in the second half of the reactor and shift the thermodynamic equilibrium. Therefore, the methanol conversion and DME mole fraction increase by 1.82% and 1.6%, respectively. The influence of inlet temperature and the molar flow rate of exothermic and endothermic stream on reactor behavior is investigated. The results suggest that coupling of these reactions could be feasible and beneficial. An experimental proof-of-concept is needed to establish the validity and safe operation of the novel reactor. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1000086 [article] Novel recuperative configuration for coupling of methanol dehydration to dimethyl ether with cyclohexane dehydrogenation to benzene [texte imprimé] / Mohammad Farsi, Auteur ; Mohammad H. Khademi, Auteur ; Abdolhosein Jahanmiri, Auteur . - 2010 . - pp. 4633–4643. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4633–4643 Mots-clés : Methanol Résumé : Coupling energy intensive endothermic reaction systems with suitable exothermic reactions improves the thermal efficiency of processes and reduces the size of reactors. One type of reactor suitable for such a type of coupling is the recuperative reactor. In this work, the catalytic methanol dehydration to dimethyl ether (DME) is coupled with the catalytic dehydrogenation of cyclohexane to benzene in a simulated integrated reactor formed of two fixed beds separated by a wall, where heat is transferred across the surface of tube. A steady state heterogeneous model of the two fixed beds predicts the performance of this novel configuration. The cocurrent mode is investigated, and the simulation results are compared with corresponding predictions for an industrial adiabatic methanol dehydration fixed-bed reactor operated at the same feed conditions. In this coupled reactor, benzene and hydrogen are also produced as additional valuable products in a favorable manner and autothermality is achieved within the reactor. This novel configuration can decrease the temperature of methanol dehydration reaction in the second half of the reactor and shift the thermodynamic equilibrium. Therefore, the methanol conversion and DME mole fraction increase by 1.82% and 1.6%, respectively. The influence of inlet temperature and the molar flow rate of exothermic and endothermic stream on reactor behavior is investigated. The results suggest that coupling of these reactions could be feasible and beneficial. An experimental proof-of-concept is needed to establish the validity and safe operation of the novel reactor. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1000086