{"id":14320,"date":"2021-03-24T17:15:09","date_gmt":"2021-03-24T16:15:09","guid":{"rendered":"https:\/\/greth.fr\/?p=14320"},"modified":"2023-03-02T16:02:46","modified_gmt":"2023-03-02T15:02:46","slug":"optimisation-dun-cycle-au-co2-dans-le-domaine-du-transport-frigorifique","status":"publish","type":"post","link":"https:\/\/greth.fr\/en\/optimisation-dun-cycle-au-co2-dans-le-domaine-du-transport-frigorifique\/","title":{"rendered":"Optimisation d\u2019un cycle au CO2 dans le domaine du transport frigorifique"},"content":{"rendered":"<p><strong><span style=\"text-decoration: underline;\">Summary :<\/span><\/strong><\/p>\n<p style=\"text-align: justify;\">L\u2019objectif de cette \u00e9tude est d\u2019optimiser un cycle frigorifique au CO2 pour une application dans le transport frigorifique. Les performances de l\u2019unit\u00e9 doivent \u00eatre sup\u00e9rieures \u00e0 celles d\u2019une machine avec une injection de vapeur et un compresseur bi-\u00e9tag\u00e9 d\u00e9j\u00e0 commercialis\u00e9. Suite \u00e0 l\u2019\u00e9tude de plusieurs solutions, un \u00e9jecteur coupl\u00e9 \u00e0 un \u00e9changeur interne semble la solution la plus int\u00e9ressante. Un banc exp\u00e9rimental est cr\u00e9\u00e9 \u00e0 partir de l\u2019unit\u00e9 poss\u00e9dant une injection de vapeur. L\u2019\u00e9jecteur est muni d\u2019une aiguille pour pouvoir assurer une recherche de la haute pression optimale. L\u2019\u00e9changeur interne est \u00e9quip\u00e9 d\u2019un by-pass pour modifier la puissance \u00e9chang\u00e9e. Un ensemble de points d\u2019essais est test\u00e9 avec deux temp\u00e9ratures d\u2019\u00e9vaporation : 0 \u00b0C et -20 \u00b0C, et trois temp\u00e9ratures de source chaude : 30 \u00b0C, 38 \u00b0C et 50 \u00b0C. L\u2019\u00e9jecteur avec aiguille est capable de s\u2019adapter \u00e0 diff\u00e9rentes temp\u00e9ratures ext\u00e9rieures en modifiant la haute pression. L\u2019\u00e9changeur interne permet d\u2019augmenter les performances du cycle mais pr\u00e9sente une limite, la temp\u00e9rature au compresseur devient \u00e9lev\u00e9e et pr\u00e9sente un risque de d\u00e9t\u00e9rioration de ses performances ou de l\u2019huile. Avec le cycle pr\u00e9sentant un \u00e9jecteur, une am\u00e9lioration du coefficient de performance est observ\u00e9e pour les points avec une temp\u00e9rature d\u2019\u00e9vaporation de 0 \u00b0C mais celle-ci chute drastiquement pour les temp\u00e9ratures d\u2019\u00e9vaporation de -20 \u00b0C. Une analyse exerg\u00e9tique du cycle confirme les faibles performances de celui-ci pour des temp\u00e9ratures d\u2019\u00e9vaporation n\u00e9gatives. \u00c0 partir des r\u00e9sultats exp\u00e9rimentaux, des mod\u00e8les num\u00e9riques sont mis en place. Les \u00e9changeurs, vannes de d\u00e9tente sont mod\u00e9lis\u00e9s de mani\u00e8re conventionnelle. Pour le compresseur, le mod\u00e8le de Winandy est modifi\u00e9 afin de fonctionner pour un compresseur bi-\u00e9tag\u00e9 avec injection de vapeur. L\u2019\u00e9jecteur est mod\u00e9lis\u00e9 \u00e0 travers un mod\u00e8le unidimensionnel bas\u00e9 sur des transformations simplifi\u00e9es d\u00e9crites \u00e0 travers des rendements isentropiques. Tous les mod\u00e8les sont valid\u00e9s mais ceux des \u00e9changeurs ont un temps de calcul CPU trop important pour pouvoir \u00eatre utilis\u00e9s sur une mod\u00e9lisation dynamique.<\/p>\n<table width=\"100%\" border=\"1\">\n<tr>\n<td><strong>Author<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Pierre-Henri NATTES<\/td>\n<\/tr>\n<tr>\n<td><strong>Date de publication<\/strong><\/td>\n<\/tr>\n<tr>\n<td>2018<\/td>\n<\/tr>\n<tr>\n<td><strong>Keywords<\/strong><\/td>\n<\/tr>\n<tr>\n<td>CO2 \u2013 \u00c9jecteur \u2013 \u00c9changeur interne \u2013 Cycle frigorifique \u2013 Exp\u00e9rimental \u2013 Num\u00e9rique \u2013 Transport<\/td>\n<\/tr>\n<\/table>\n\n&nbsp;<br \/>\n\n<div class=\"eds-animate edsanimate-sis-hidden\" data-eds-entry-animation=\"bounceIn\" data-eds-entry-delay=\"0\" data-eds-entry-duration=\"1\" data-eds-entry-timing=\"linear\" data-eds-exit-animation=\"\" data-eds-exit-delay=\"\" data-eds-exit-duration=\"\" data-eds-exit-timing=\"\" data-eds-repeat-count=\"1\" data-eds-keep=\"yes\" data-eds-animate-on=\"load\" data-eds-scroll-offset=\"\">\n\t\t<div class=\"box info\">\n\t\t\t<div class=\"box-inner-block\">\n\t\t\t\t<span class=\"fa tie-shortcode-boxicon\"><\/span>\n<p style=\"text-align: justify;\"><strong>&#x2666; The full version is only available for subscribers <a style=\"text-decoration: none;\" href=\"\/en\/offre-du-greth\/\"><span style=\"background-color: #3db2ea; color: #fff;\">\"ESSENTIEL\"<\/span><\/a> or <a style=\"text-decoration: none;\" href=\"\/en\/offre-du-greth\/\"><span style=\"background-color: #c6002c; color: #fff;\">\"PREMIUM\"<\/span><\/a> of GRETh!<\/strong><\/p>\n<p>&#x2666; If you are already a member \/ subscriber, you must identify yourself by <a href=\"\/wp-login.php\"><strong>clicking here<\/strong><\/a>.<br \/>\n&#x2666; If you are not a member, you can consult the offer proposed by GRETh by <a href=\"\/en\/offre-du-greth\/\"><strong>clicking here<\/strong><\/a> as well as the conditions of membership by <a href=\"\/en\/conditions-adhesion\/\"><strong>clicking here<\/strong><\/a>.\n\t\t\t<\/div>\n\t\t<\/div>\n\t<\/div>","protected":false},"excerpt":{"rendered":"<p>R\u00e9sum\u00e9 : L\u2019objectif de cette \u00e9tude est d\u2019optimiser un cycle frigorifique au CO2 pour une application dans le transport frigorifique. Les performances de l\u2019unit\u00e9 doivent \u00eatre sup\u00e9rieures \u00e0 celles d\u2019une machine avec une injection de vapeur et un compresseur bi-\u00e9tag\u00e9 d\u00e9j\u00e0 commercialis\u00e9. Suite \u00e0 l\u2019\u00e9tude de plusieurs solutions, un \u00e9jecteur coupl\u00e9 \u00e0 un \u00e9changeur interne &hellip;<\/p>","protected":false},"author":1,"featured_media":962,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,21],"tags":[6528,6531,6530,6529,6532,6533,6534],"class_list":["post-14320","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-documents","category-memoires-theses","tag-co2","tag-cycle-frigorifique","tag-echangeur-interne","tag-ejecteur","tag-experimental","tag-numerique","tag-transport"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.9 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Optimisation d\u2019un cycle au CO2 dans le domaine du transport frigorifique - GRETh<\/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:\/\/greth.fr\/en\/optimisation-dun-cycle-au-co2-dans-le-domaine-du-transport-frigorifique\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Optimisation d\u2019un cycle au CO2 dans le domaine du transport frigorifique\" \/>\n<meta property=\"og:description\" content=\"R\u00e9sum\u00e9 : L\u2019objectif de cette \u00e9tude est d\u2019optimiser un cycle frigorifique au CO2 pour une application dans le transport frigorifique. 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