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{"id":714,"date":"2009-10-13T15:16:20","date_gmt":"2009-10-13T13:16:20","guid":{"rendered":"https:\/\/energethique.be\/?p=714"},"modified":"2009-10-13T19:58:59","modified_gmt":"2009-10-13T17:58:59","slug":"lenergie-grace-au-magicien-dosmose","status":"publish","type":"post","link":"https:\/\/energethique.be\/2009\/lenergie-grace-au-magicien-dosmose\/","title":{"rendered":"L’\u00e9nergie gr\u00e2ce au magicien d’Osmose"},"content":{"rendered":"L’osmose, vous connaissez ? L’osmose, grandeur assez m\u00e9connue du grand public (en tout cas je l’ai d\u00e9couverte tr\u00e8s r\u00e9cemment pour ma part) est le nom donn\u00e9 par le chimiste anglais Thomas Graham (pour la petite histoire) \u00e0 la force qui tend \u00e0 \u00e9quilibrer les concentrations chimiques. En effet, deux solutions d’un m\u00eame solut\u00e9 et de concentrations diff\u00e9rentes mises en contact vont tendre \u00e0 s’\u00e9quilibrer \u00e0 une m\u00eame concentration.<\/p>\n
Mais comment donc r\u00e9cup\u00e9rer l’\u00e9nergie osmotique ?<\/p>\n
<\/p>\n
Et bien le principe est assez simple, je vais l’expliquer avec l’exemple pratique de l’eau douce\/eau de mer, vous pouvez g\u00e9n\u00e9raliser si vous le d\u00e9sirez.
\nAlors on place en r\u00e9alit\u00e9 une membrane semi-perm\u00e9able entre de l’eau douce et de l’eau de mer. Semi-perm\u00e9able, cela signifie qu’elle est perm\u00e9able \u00e0 l’eau et imperm\u00e9able au solut\u00e9 (ici le sel). Et donc, l’eau douce va traverser la membrane pour diluer l’eau de mer sal\u00e9e. L’\u00e9nergie r\u00e9cup\u00e9rable est donc la pression osmotique entre l’eau douce et l’eau sal\u00e9e. L’eau sal\u00e9e, dont la pression a augment\u00e9 d’un terme \u00e9gal \u00e0 la pression osmotique donc, peut alors \u00eatre utilis\u00e9e dans une turbine pour produire de l’\u00e9lectricit\u00e9. Vous aurez donc compris que ce genre de centrale doit \u00eatre install\u00e9e \u00e0 l’embouchure d’un fleuve, c’est \u00e0 dire \u00e0 l’endroit o\u00f9 l’eau douce va rencontrer l’eau sal\u00e9e…<\/p>\n
Pourquoi je vous parle de \u00e7a aujourd’hui ?<\/p>\n
Parce que la soci\u00e9t\u00e9 norv\u00e9gienne Statkraft a r\u00e9cemment annonc\u00e9 qu’elle inaugurerait ce 24 novembre la premi\u00e8re centrale osmotique au monde, en pr\u00e9sence de son Altesse Royale la princesse Mette-Marit de Norv\u00e8ge (pour ceux qui regardent Place Royale \ud83d\ude09 ).<\/p>\n
Enfin ils estiment leur potentiel de production \u00e0 12TWh pour la Norv\u00e8ge, soit 10% de la production totale annuelle (\u00e7a reste \u00e0 v\u00e9rifier, c’est s\u00fbr qu’ils ont int\u00e9r\u00eat \u00e0 vanter leur produit). Le potentiel mondial annuel serait quant \u00e0 lui estim\u00e9e \u00e0 1600-1700TWh, ce qui n’est pas n\u00e9gligeable !<\/p>\n
D\u00e9couvert sur Les \u00e9nergies de la mer<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"L’osmose, vous connaissez ? L’osmose, grandeur assez m\u00e9connue du grand public (en tout cas je l’ai d\u00e9couverte tr\u00e8s r\u00e9cemment pour ma part) est le nom donn\u00e9 par le chimiste anglais Thomas Graham (pour la petite histoire) \u00e0 la force qui tend \u00e0 \u00e9quilibrer les concentrations chimiques. En effet, deux solutions d’un m\u00eame solut\u00e9 et de concentrations diff\u00e9rentes mises en contact vont tendre \u00e0 s’\u00e9quilibrer \u00e0 une m\u00eame concentration.<\/p>\n
Mais comment donc r\u00e9cup\u00e9rer l’\u00e9nergie osmotique ?<\/p>\n<\/p>\n
Et bien le principe est assez simple, […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[25],"tags":[],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/pBGwz-bw","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts\/714"}],"collection":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/comments?post=714"}],"version-history":[{"count":0,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts\/714\/revisions"}],"wp:attachment":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/media?parent=714"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/categories?post=714"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/tags?post=714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}