{"id":327,"date":"2010-08-25T10:45:30","date_gmt":"2010-08-25T10:45:30","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/08\/25\/etatsunis-58-des-energies-primaires-consommees-en-2009-sont-partis-en-chaleur-inutile\/"},"modified":"2012-07-12T12:19:01","modified_gmt":"2012-07-12T12:19:01","slug":"etatsunis-58-des-energies-primaires-consommees-en-2009-sont-partis-en-chaleur-inutile","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/08\/25\/etatsunis-58-des-energies-primaires-consommees-en-2009-sont-partis-en-chaleur-inutile\/","title":{"rendered":"Etats-Unis: 58% des \u00e9nergies primaires consomm\u00e9es en 2009 sont partis en chaleur inutile"},"content":{"rendered":"<p>Le Lawrence Livermore Laboratory vient de publier la flow-chart des consommations internes et des utilisations d&#039;\u00e9nergie primaire aux \u00c9tats-Unis en 2009. Il ressort clairement de cette publication que le gaspillage constitue toujours la principale ressource potentielle d&#039;\u00e9conomies d&#039;\u00e9nergie de cette grande nation (FIG.).<\/p>\n<p> <a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e201348672f99d970c-pi.jpg\"><img decoding=\"async\" alt=\"US-Energy-flow-2009\" class=\"asset asset-image at-xid-6a00d83451b18369e201348672f99d970c \" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e201348672f99d970c-450wi.jpg\" style=\"width: 450px\" \/><\/a> <br \/>En effet, outre l&#039;int\u00e9r\u00eat de cette repr\u00e9sentation des diverses formes d&#039;\u00e9nergies primaires consomm\u00e9es \u00e0 l&#039;entr\u00e9e, les rendements \u00e9nerg\u00e9tiques des phases de transformation en \u00e9lectricit\u00e9 ou d&#039;utilisation sont illustr\u00e9s. Il ressort que sur une consommation totale de 94,6 quadrillons de BTU (1QBTU = 293 TWh thermiques), 40 QBTU seulement participent \u00e0 l&#039;activit\u00e9 \u00e9conomique du pays (lignes gris-fonc\u00e9 du diagramme). Les autres 55 QBTU (lignes gris-clair sur le diagramme), repr\u00e9sentant 58% du total, sont partis en chaleur lors des processus de conversion et d&#039;utilisation.<\/p>\n<p>La principale perte provient de la production et de la distribution d&#039;\u00e9lectricit\u00e9 qui avec 26 QBTU de pertes (le quart de la totalit\u00e9 de l&#039;\u00e9nergie mise en \u0153uvre), affiche un rendement global de 32% \u00e9nergies \u00e9olienne et photovolta\u00efques comprises. L&#039;autre poste est bien s\u00fbr celui des transports qui avec 20 QBTU de pertes affiche un rendement global de 25%.&#160;<\/p>\n<p>Ces chiffres cl\u00e9s permettent de comprendre pourquoi les progr\u00e8s trop lents accomplis dans l&#039;am\u00e9lioration des rendements \u00e9nerg\u00e9tiques des processus doivent \u00eatre acc\u00e9l\u00e9r\u00e9s. La reconstruction de centrales \u00e9lectriques modernes \u00e0 cycles combin\u00e9s, la reconstruction des r\u00e9seaux de distribution d&#039;\u00e9lectricit\u00e9, seraient bien plus utiles \u00e0 cette nation que toutes les \u00e9oliennes dont le communiqu\u00e9 s&#039;enorgueillit. Bien s\u00fbr cette remarque est aussi vraie pour l&#039;Europe de l&#039;\u00e9nergie.<\/p>\n<p>Une consolation les rendements \u00e9nerg\u00e9tiques dans les transports vont faire de gros progr\u00e8s avec les v\u00e9hicules modernes qui vont \u00eatre propos\u00e9s par les constructeurs. Une augmentation des prix des carburants \u00e0 la pompe irait dans le bon sens pour acc\u00e9l\u00e9rer le ph\u00e9nom\u00e8ne.<\/p>\n<p><a href=\"https:\/\/publicaffairs.llnl.gov\/news\/news_releases\/2010\/NR-10-08-05.html\" target=\"_blank\">LIRE<\/a> le communiqu\u00e9 sur ce sujet.<\/p>\n<p>Le 25 Ao\u00fbt 2010<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le Lawrence Livermore Laboratory vient de publier la flow-chart des consommations internes et des utilisations d&#039;\u00e9nergie primaire aux \u00c9tats-Unis en 2009. Il ressort clairement de cette publication que le gaspillage constitue toujours la principale ressource potentielle d&#039;\u00e9conomies d&#039;\u00e9nergie de cette grande nation (FIG.). En effet, outre l&#039;int\u00e9r\u00eat de cette repr\u00e9sentation des diverses formes d&#039;\u00e9nergies primaires [&hellip;]<\/p>\n","protected":false},"author":341,"featured_media":22178,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,3],"tags":[],"class_list":["post-327","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-energie-fossile"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Etats-Unis: 58% des \u00e9nergies primaires consomm\u00e9es en 2009 sont partis en chaleur inutile - 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\/2010\/08\/25\/etatsunis-58-des-energies-primaires-consommees-en-2009-sont-partis-en-chaleur-inutile\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Etats-Unis: 58% des \u00e9nergies primaires consomm\u00e9es en 2009 sont partis en chaleur inutile - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"Le Lawrence Livermore Laboratory vient de publier la flow-chart des consommations internes et des utilisations d&#039;\u00e9nergie primaire aux \u00c9tats-Unis en 2009. Il ressort clairement de cette publication que le gaspillage constitue toujours la principale ressource potentielle d&#039;\u00e9conomies d&#039;\u00e9nergie de cette grande nation (FIG.). En effet, outre l&#039;int\u00e9r\u00eat de cette repr\u00e9sentation des diverses formes d&#039;\u00e9nergies primaires [&hellip;]\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e201348672f99d970c-450wi.jpg\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Raymond Bonnaterre\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/08\/25\/etatsunis-58-des-energies-primaires-consommees-en-2009-sont-partis-en-chaleur-inutile\/\",\"url\":\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/08\/25\/etatsunis-58-des-energies-primaires-consommees-en-2009-sont-partis-en-chaleur-inutile\/\",\"name\":\"Etats-Unis: 58% des \u00e9nergies primaires consomm\u00e9es en 2009 sont partis en chaleur inutile - 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