Documents disponibles écrits par cet auteur

A compact electrical model for microscale fuel cells capable of predicting runtime and I – V polarization performance / Min Chen in IEEE transactions on energy conversion, Vol. 23 n°3 (Septembre 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 n°3 (Septembre 2008) . - pp. 842 - 850 Titre : A compact electrical model for microscale fuel cells capable of predicting runtime and I – V polarization performance Type de document : texte imprimé Auteurs : Min Chen, Auteur ; Rincon-Mora, G. A., Auteur Année de publication : 2008 Article en page(s) : pp. 842 - 850 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Direct  methanol  fuel  cells;  polarisation Résumé : The growing popularity and success of fuel cells (FCs) in aerospace, stationary power, and transportation applications is driving and challenging researchers to complement and in some cases altogether replace the batteries of portable systems in the hopes of increasing functional density, extending runtime, and decreasing size. Direct-methanol fuel cell (DMFC) batteries have now been built and conformed to low-cost technologies and chip-scale dimensions. Conventional FC models, however, fail to accurately capture the electrical nuances and runtime expectancies of these microscale devices, yet predicting that these electrical characteristics are even more critical when designing portable low-power electronics. A Cadence-compatible model of a DMFC battery is therefore developed to capture all pertinent dynamic and steady-state electrical performance parameters, including capacity and its dependence to current and temperature, open-circuit voltage, methanol-crossover current, polarization curve and its dependence to concentration, internal resistance, and time-dependent response under various loading conditions-the model can also be extended to other micro- and macroscale FC technologies. The simulation results of the proposed electrical model are validated and compared against the experimental performance of several DMFC prototypes, resulting in a runtime error of less than 10.8% and a voltage error under various current loads of less than 80 mV for up to 95% of its operational life. The root cause of the remaining errors and relevant temperature effects in the proposed model are also discussed. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4567145&sortType%3Das [...] [article] A compact electrical model for microscale fuel cells capable of predicting runtime and I – V polarization performance [texte imprimé] / Min Chen, Auteur ; Rincon-Mora, G. A., Auteur . - 2008 . - pp. 842 - 850. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 n°3 (Septembre 2008) . - pp. 842 - 850 Mots-clés : Direct  methanol  fuel  cells;  polarisation Résumé : The growing popularity and success of fuel cells (FCs) in aerospace, stationary power, and transportation applications is driving and challenging researchers to complement and in some cases altogether replace the batteries of portable systems in the hopes of increasing functional density, extending runtime, and decreasing size. Direct-methanol fuel cell (DMFC) batteries have now been built and conformed to low-cost technologies and chip-scale dimensions. Conventional FC models, however, fail to accurately capture the electrical nuances and runtime expectancies of these microscale devices, yet predicting that these electrical characteristics are even more critical when designing portable low-power electronics. A Cadence-compatible model of a DMFC battery is therefore developed to capture all pertinent dynamic and steady-state electrical performance parameters, including capacity and its dependence to current and temperature, open-circuit voltage, methanol-crossover current, polarization curve and its dependence to concentration, internal resistance, and time-dependent response under various loading conditions-the model can also be extended to other micro- and macroscale FC technologies. The simulation results of the proposed electrical model are validated and compared against the experimental performance of several DMFC prototypes, resulting in a runtime error of less than 10.8% and a voltage error under various current loads of less than 80 mV for up to 95% of its operational life. The root cause of the remaining errors and relevant temperature effects in the proposed model are also discussed. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4567145&sortType%3Das [...]

Fast degradation and biodegradability improvement of reactive brilliant red X - 3B by the cobalt(II) / bicarbonate / hydrogen peroxide system / Zhen Yang in Industrial & engineering chemistry research, Vol. 51 N° 34 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 34 (Août 2012) . - pp. 11104-11111 Titre : Fast degradation and biodegradability improvement of reactive brilliant red X - 3B by the cobalt(II) / bicarbonate / hydrogen peroxide system Type de document : texte imprimé Auteurs : Zhen Yang, Auteur ; Hong Wang, Auteur ; Min Chen, Auteur Année de publication : 2012 Article en page(s) : pp. 11104-11111 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydrogen  peroxide  Biodegradability Résumé : The cobalt(II)-bicacbonate (HCO3―) complex is a very efficient catalyst for organic dye decolorization with H2O2 as an oxidant, but its mineralization degree is very low. One interesting alternative is the combination of the system with a subsequent biological step. With the aim of employing the Co2+-HCO3― system as a pretreatment method to dye wastewater, a typical azo dye, reactive brilliant red X-3B (X-3B), was selected as the model compound, and the biodegradability enhancement of the dye was investigated. The results showed that X-3B was effectively degraded by the Co2+-HCO3― system under various mild conditions, and the BOD5/COD ratio of the dye solution could markedly increase from 0.046 to higher than 0.46. The effluent treatment by the system was efficiently post-treated in a batch biological reactor with the COD removal around 44% after 8 h aeration, while a little decrease of the COD value of the raw solution was observed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26299435 [article] Fast degradation and biodegradability improvement of reactive brilliant red X - 3B by the cobalt(II) / bicarbonate / hydrogen peroxide system [texte imprimé] / Zhen Yang, Auteur ; Hong Wang, Auteur ; Min Chen, Auteur . - 2012 . - pp. 11104-11111. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 34 (Août 2012) . - pp. 11104-11111 Mots-clés : Hydrogen  peroxide  Biodegradability Résumé : The cobalt(II)-bicacbonate (HCO3―) complex is a very efficient catalyst for organic dye decolorization with H2O2 as an oxidant, but its mineralization degree is very low. One interesting alternative is the combination of the system with a subsequent biological step. With the aim of employing the Co2+-HCO3― system as a pretreatment method to dye wastewater, a typical azo dye, reactive brilliant red X-3B (X-3B), was selected as the model compound, and the biodegradability enhancement of the dye was investigated. The results showed that X-3B was effectively degraded by the Co2+-HCO3― system under various mild conditions, and the BOD5/COD ratio of the dye solution could markedly increase from 0.046 to higher than 0.46. The effluent treatment by the system was efficiently post-treated in a batch biological reactor with the COD removal around 44% after 8 h aeration, while a little decrease of the COD value of the raw solution was observed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26299435

Numerical modeling of thermoelectric generators with varing material properties in a circuit simulator / Min Chen in IEEE transactions on energy conversion, Vol. 24 N°1 (Mars 2009) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 24 N°1 (Mars 2009) . - pp. 112 - 124 Titre : Numerical modeling of thermoelectric generators with varing material properties in a circuit simulator Type de document : texte imprimé Auteurs : Min Chen, Auteur ; Rosendahl, L. A., Auteur ; Condra, T. J., Auteur Année de publication : 2009 Article en page(s) : pp. 112 - 124 Note générale : energy conversion Langues : Anglais (eng) Mots-clés : Circuit  simulation;  numerical  analysis;  power  system  simulation;  thermoelectric  conversion Résumé : When a thermoelectric generator (TEG) and its external load circuitry are considered together as a system, the codesign and co-optimization of the electronics and the device are crucial in maximizing the system efficiency. In this paper, an accurate TEG model is proposed and implemented in a SPICE-compatible environment. This model of thermoelectric battery accounts for all temperature-dependent characteristics of the thermoelectric materials to include the nonlinear voltage, current, and electrothermal coupled effects. It is validated with simulation data from the recognized program ANSYS and experimental data from a real thermoelectric device, respectively. Within a common circuit simulator, the model can be easily connected to various electrical models of applied loads to predict and optimize the system performance. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4776483&sortType%3Das [...] [article] Numerical modeling of thermoelectric generators with varing material properties in a circuit simulator [texte imprimé] / Min Chen, Auteur ; Rosendahl, L. A., Auteur ; Condra, T. J., Auteur . - 2009 . - pp. 112 - 124. energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N°1 (Mars 2009) . - pp. 112 - 124 Mots-clés : Circuit  simulation;  numerical  analysis;  power  system  simulation;  thermoelectric  conversion Résumé : When a thermoelectric generator (TEG) and its external load circuitry are considered together as a system, the codesign and co-optimization of the electronics and the device are crucial in maximizing the system efficiency. In this paper, an accurate TEG model is proposed and implemented in a SPICE-compatible environment. This model of thermoelectric battery accounts for all temperature-dependent characteristics of the thermoelectric materials to include the nonlinear voltage, current, and electrothermal coupled effects. It is validated with simulation data from the recognized program ANSYS and experimental data from a real thermoelectric device, respectively. Within a common circuit simulator, the model can be easily connected to various electrical models of applied loads to predict and optimize the system performance. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4776483&sortType%3Das [...]