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Computer-based study of secondary emission cell (SEC) efficiency compared to that of a vacuum-type direct collection cell / Romer, M. in IEEE transactions on energy conversion, Vol. 23 N°1 (Mars 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 331 - 341 Titre : Computer-based study of secondary emission cell (SEC) efficiency compared to that of a vacuum-type direct collection cell Type de document : texte imprimé Auteurs : Romer, M., Auteur ; Miley, G.H., Auteur ; Nie Luo, Auteur Année de publication : 2008 Article en page(s) : pp. 331 - 341 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Computer  aided  analysis;  energy  conservation;  insulators;  nuclear  power;  power  engineering  computing;  secondary  cells;  secondary  emission Résumé : The concept of directly collecting secondary electrons created by beta emission through an electrical insulator has been proposed as an attractive low-voltage nuclear battery termed a secondary emission cell (SEC). In this paper, a MATLAB computer simulation of an SEC is conducted using Mott scattering, the Penfold-Katz slowing approximation, Bethe's ionization loss expression, and energy and momentum conservation. The goal of the simulation is to compare the efficiency of an SEC to that of a vacuum direct collection cell. It is found that the SEC efficiency is typically les1%. Energy losses in the insulator prevent it from having an efficiency advantage over a vacuum direct collection cell which offers higher efficiencies, especially at high voltages. However, operational simplicity and ease of construction still make the SEC attractive for some applications. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4453998&sortType%3Das [...] [article] Computer-based study of secondary emission cell (SEC) efficiency compared to that of a vacuum-type direct collection cell [texte imprimé] / Romer, M., Auteur ; Miley, G.H., Auteur ; Nie Luo, Auteur . - 2008 . - pp. 331 - 341. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 331 - 341 Mots-clés : Computer  aided  analysis;  energy  conservation;  insulators;  nuclear  power;  power  engineering  computing;  secondary  cells;  secondary  emission Résumé : The concept of directly collecting secondary electrons created by beta emission through an electrical insulator has been proposed as an attractive low-voltage nuclear battery termed a secondary emission cell (SEC). In this paper, a MATLAB computer simulation of an SEC is conducted using Mott scattering, the Penfold-Katz slowing approximation, Bethe's ionization loss expression, and energy and momentum conservation. The goal of the simulation is to compare the efficiency of an SEC to that of a vacuum direct collection cell. It is found that the SEC efficiency is typically les1%. Energy losses in the insulator prevent it from having an efficiency advantage over a vacuum direct collection cell which offers higher efficiencies, especially at high voltages. However, operational simplicity and ease of construction still make the SEC attractive for some applications. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4453998&sortType%3Das [...]

Ragone plot comparison of radioisotope cells and the direct sodium borohydride/hydrogen peroxide fuel cell with chemical batteries / Romer, M. in IEEE transactions on energy conversion, Vol. 23 N°1 (Mars 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 171 - 178 Titre : Ragone plot comparison of radioisotope cells and the direct sodium borohydride/hydrogen peroxide fuel cell with chemical batteries Type de document : texte imprimé Auteurs : Romer, M., Auteur ; Miley, G.H., Auteur ; Nie Luo, Auteur Année de publication : 2008 Article en page(s) : pp. 171 - 178 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Cells  (electric);  energy  storage;  fuel  cells;  hydrogen  compounds;  nuclear  power;  sodium  compounds Résumé : Radioisotope cells (RCs) and a direct sodium borohydride/hydrogen peroxide fuel cell ( FC) are compared to conventional chemical batteries through Ragone plots of theoretical (RCs) and experimental (chemical batteries and FC) data. It is found that the RCs are projected to have superior specific energy but inferior specific power, while the borohydride/peroxide FC shows an impressive range for both parameters. Thus, RCs may be especially useful in battery charging, communications, or other applications that require a long-lived, low-power source or periodic pulses of energy. While the borohydride/peroxide FC can be scaled to a variety of high-power applications, it is especially well suited for space and undersea use where air independence is essential. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4453997&sortType%3Das [...] [article] Ragone plot comparison of radioisotope cells and the direct sodium borohydride/hydrogen peroxide fuel cell with chemical batteries [texte imprimé] / Romer, M., Auteur ; Miley, G.H., Auteur ; Nie Luo, Auteur . - 2008 . - pp. 171 - 178. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 171 - 178 Mots-clés : Cells  (electric);  energy  storage;  fuel  cells;  hydrogen  compounds;  nuclear  power;  sodium  compounds Résumé : Radioisotope cells (RCs) and a direct sodium borohydride/hydrogen peroxide fuel cell ( FC) are compared to conventional chemical batteries through Ragone plots of theoretical (RCs) and experimental (chemical batteries and FC) data. It is found that the RCs are projected to have superior specific energy but inferior specific power, while the borohydride/peroxide FC shows an impressive range for both parameters. Thus, RCs may be especially useful in battery charging, communications, or other applications that require a long-lived, low-power source or periodic pulses of energy. While the borohydride/peroxide FC can be scaled to a variety of high-power applications, it is especially well suited for space and undersea use where air independence is essential. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4453997&sortType%3Das [...]