{"id":2199,"date":"2008-07-25T15:35:42","date_gmt":"2008-07-25T15:35:42","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2008\/07\/25\/leffet-thermole-2\/"},"modified":"2012-07-12T10:49:51","modified_gmt":"2012-07-12T10:49:51","slug":"leffet-thermole-2","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2008\/07\/25\/leffet-thermole-2\/","title":{"rendered":"L&rsquo;effet thermo\u00e9lectrique : une des voies pour \u00e9conomiser de l&rsquo;\u00e9nergie \u00e0 bord des v\u00e9hicules."},"content":{"rendered":"<p>&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; <strong><span style=\"font-size: 1.4em\">A<\/span><\/strong> partir du moment o\u00f9 un v\u00e9hicule dispose d&rsquo;une batterie et d&rsquo;un moteur \u00e9lectrique il est possible, \u00e0 bord de ce v\u00e9hicule, de r\u00e9cup\u00e9rer diverses formes d&rsquo;\u00e9nergies, de les transformer en \u00e9nergie \u00e9lectrique pour l&rsquo;utiliser directement ou la stocker dans la batterie. Un exemple visible est l&rsquo;utilisation d&rsquo;un panneau solaire en guise de toit de la voiture, ce qu&rsquo;a d\u00e9cid\u00e9 Toyota pour tous ses futurs v\u00e9hicules hybrides ou \u00e9lectriques. Une autre id\u00e9e est de r\u00e9cup\u00e9rer sur les v\u00e9hicules hybrides une partie des pertes thermiques provenant des gaz d&rsquo;\u00e9chappement du moteur au moyen de dispositifs thermo\u00e9lectriques. C&rsquo;est une des raisons pour lesquelles un grand nombre de laboratoires travaillent \u00e0 l&rsquo;am\u00e9lioration des propri\u00e9t\u00e9s de ces mat\u00e9riaux, afin d&rsquo;amener leur rendement \u00e0 des valeurs \u00e9conomiquement acceptables.<\/p>\n<p>. <a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/thermo1.jpg\"><img loading=\"lazy\" decoding=\"async\" height=\"285\" alt=\"Thermo\" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/thermo.jpg\" width=\"480\"  \/><\/a> <\/p>\n<p>&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; Les mat\u00e9riaux sont caract\u00e9ris\u00e9s par leur coefficient de m\u00e9rite ZT qui d\u00e9pend de la temp\u00e9rature de fonctionnement, du coefficient de Seebeck qui les caract\u00e9rise et de leurs conductibilit\u00e9s \u00e9lectriques et thermiques. (Pour plus de d\u00e9tails on lira l&rsquo;article fran\u00e7ais de Wikipedia qui est tr\u00e8s bien fait). Les professionnels consid\u00e8rent que les premi\u00e8res applications grand public n\u00e9cessiteront des mat\u00e9riaux pr\u00e9sentant des coefficients de m\u00e9rite de l&rsquo;ordre de trois, pour pr\u00e9senter des rendements \u00e9lectriques permettant de justifier les prix de ces produits. <\/p>\n<p>&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; Joseph Heremans de l&rsquo;Universit\u00e9 de l&rsquo;Ohio vient d&rsquo;annoncer qu&rsquo;il venait de faire faire un net progr\u00e8s aux alliages classiquement utilis\u00e9s \u00e0 base de tellurure de Plomb dop\u00e9s au Sodium en rempla\u00e7ant le dopant par du Thallium (FIG.). Avec 2% de Thallium par rapport au Plomb il arrive \u00e0 atteindre un coefficient de m\u00e9rite de 1,5 aux temp\u00e9ratures proches de celles des gaz d&rsquo;\u00e9chappement. <\/p>\n<p>&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;J. Heremans ne perd pas espoir d&rsquo;accro\u00eetre encore cette caract\u00e9ristique sur de nouveaux mat\u00e9riaux.<\/p>\n<p>&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; Aux USA le Department of Energy&nbsp; finance des recherches sur ces mat\u00e9riaux. Une autre id\u00e9e en utilisant les propri\u00e9t\u00e9s de refroidissement de ces mat\u00e9riaux, serait de les utiliser pour refroidir les si\u00e8ges de voitures permettant ainsi d&rsquo;am\u00e9liorer le bilan \u00e9nerg\u00e9tique du conditionnement d&rsquo;air, en amenant le froid localement.<\/p>\n<p>Le 25 Juillet 2008.<\/p>\n<p>&#8211;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; A partir du moment o\u00f9 un v\u00e9hicule dispose d&rsquo;une batterie et d&rsquo;un moteur \u00e9lectrique il est possible, \u00e0 bord de ce v\u00e9hicule, de r\u00e9cup\u00e9rer diverses formes d&rsquo;\u00e9nergies, de les transformer en \u00e9nergie \u00e9lectrique pour l&rsquo;utiliser directement ou la stocker dans la batterie. Un exemple visible est l&rsquo;utilisation [&hellip;]<\/p>\n","protected":false},"author":341,"featured_media":9640,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-2199","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rechauffement-climatique"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>L&#039;effet thermo\u00e9lectrique : une des voies pour \u00e9conomiser de l&#039;\u00e9nergie \u00e0 bord des v\u00e9hicules. - leblogenergie.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2008\/07\/25\/leffet-thermole-2\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"L&#039;effet thermo\u00e9lectrique : une des voies pour \u00e9conomiser de l&#039;\u00e9nergie \u00e0 bord des v\u00e9hicules. - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; A partir du moment o\u00f9 un v\u00e9hicule dispose d&rsquo;une batterie et d&rsquo;un moteur \u00e9lectrique il est possible, \u00e0 bord de ce v\u00e9hicule, de r\u00e9cup\u00e9rer diverses formes d&rsquo;\u00e9nergies, de les transformer en \u00e9nergie \u00e9lectrique pour l&rsquo;utiliser directement ou la stocker dans la batterie. 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&nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; A partir du moment o\u00f9 un v\u00e9hicule dispose d&rsquo;une batterie et d&rsquo;un moteur \u00e9lectrique il est possible, \u00e0 bord de ce v\u00e9hicule, de r\u00e9cup\u00e9rer diverses formes d&rsquo;\u00e9nergies, de les transformer en \u00e9nergie \u00e9lectrique pour l&rsquo;utiliser directement ou la stocker dans la batterie. 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