{"id":1094,"date":"2003-08-10T11:50:21","date_gmt":"2003-08-10T09:50:21","guid":{"rendered":"http:\/\/greth.fr\/?p=1094"},"modified":"2023-02-24T14:17:45","modified_gmt":"2023-02-24T13:17:45","slug":"developpement-etude-de-performances-et-integration-de-sondes-thermiques-pour-la-caracterisation-de-lencrassement-dechangeurs-tubulaires-a-courants-croises","status":"publish","type":"post","link":"https:\/\/greth.fr\/en\/developpement-etude-de-performances-et-integration-de-sondes-thermiques-pour-la-caracterisation-de-lencrassement-dechangeurs-tubulaires-a-courants-croises\/","title":{"rendered":"D\u00e9veloppement, \u00e9tude de performances et int\u00e9gration de sondes thermiques pour la caract\u00e9risation de l\u2019encrassement d\u2019\u00e9changeurs tubulaires \u00e0 courants crois\u00e9s"},"content":{"rendered":"<p><strong><span style=\"text-decoration: underline;\">Summary :<\/span><\/strong><br \/>\nDepuis la fin des ann\u00e9es 1970, les \u00e9changeurs de chaleur ont connu de nouvelles applications li\u00e9es \u00e0 la n\u00e9cessit\u00e9 d\u2019optimiser les d\u00e9penses \u00e9nerg\u00e9tiques. L\u2019encrassement de tels \u00e9changeurs est l\u2019une des causes principales de leur perte d\u2019efficacit\u00e9 thermique au cours de leur utilisation. En effet, l\u2019encrassement constitue un probl\u00e8me \u00e9conomique et technologique majeur et fait intervenir des ph\u00e9nom\u00e8nes physiques complexes. En d\u00e9pit des efforts d\u00e9ploy\u00e9s depuis ces derni\u00e8res d\u00e9cennies, les dispositifs de d\u00e9tection et de suivi de l\u2019encrassement existants sont encore loin de renseigner sur le transfert de chaleur et de prendre en compte les ph\u00e9nom\u00e8nes de d\u00e9p\u00f4t mis en jeu.<\/p>\n<p>Ainsi, le parti pris de notre \u00e9tude a \u00e9t\u00e9 de concevoir un capteur thermique le plus repr\u00e9sentatif possible des conditions d\u2019utilisation r\u00e9elles afin d\u2019\u00e9tablir un programme d\u2019entretien efficace. A cet effet, deux capteurs localis\u00e9s originaux, d\u2019une technologie simple, adjoints \u00e0 un traitement des donn\u00e9es adapt\u00e9, ont \u00e9t\u00e9 d\u00e9velopp\u00e9s. Ne perturbant que tr\u00e8s peu les conditions auxquelles ils sont soumis, ils permettent d\u2019obtenir des informations pr\u00e9cises quasi instantan\u00e9es sur les param\u00e8tres repr\u00e9sentatifs du degr\u00e9 d\u2019encrassement des \u00e9changeurs. Bien que les m\u00e9thodes d\u00e9velopp\u00e9es lors de cette \u00e9tude soient adaptables \u00e0 d\u2019autres configurations, le choix, incontestablement restrictif, de travailler sur l\u2019encrassement particulaire des \u00e9changeurs tubulaires \u00e0 courants crois\u00e9s, a \u00e9t\u00e9 fait.<\/p>\n<p>Le premier capteur, dot\u00e9 d\u2019une excitation thermique interne, permet d\u2019estimer non seulement le coefficient d\u2019\u00e9change convectif mais aussi l\u2019\u00e9paisseur du d\u00e9p\u00f4t \u00e0 partir d\u2019une m\u00e9thode d\u2019estimation robuste en r\u00e9gime transitoire. Le second capteur permet d\u2019estimer la r\u00e9partition spatiale du coefficient d\u2019\u00e9change convectif ainsi que celle de l\u2019\u00e9paisseur de d\u00e9p\u00f4t.<\/p>\n<p>Ces capteurs permettent d\u2019envisager de nouvelles perspectives d\u2019\u00e9tudes in situ d\u2019encrassement en milieu industriel. Ils constituent un outil privil\u00e9gi\u00e9 de maintenance pr\u00e9dictive.<\/p>\n<table width=\"100%\" border=\"1\">\n<tr>\n<td><strong>Auteur(s)<\/strong><\/td>\n<\/tr>\n<tr>\n<td>PEREZ Laetitia<\/td>\n<\/tr>\n<tr>\n<td><strong>Ann\u00e9e<\/strong><\/td>\n<\/tr>\n<tr>\n<td>2003<\/td>\n<\/tr>\n<tr>\n<td><strong>Keywords<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Sondes thermiques, encrassement, \u00e9changeurs tubulaires, courants crois\u00e9s<\/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 : Depuis la fin des ann\u00e9es 1970, les \u00e9changeurs de chaleur ont connu de nouvelles applications li\u00e9es \u00e0 la n\u00e9cessit\u00e9 d\u2019optimiser les d\u00e9penses \u00e9nerg\u00e9tiques. L\u2019encrassement de tels \u00e9changeurs est l\u2019une des causes principales de leur perte d\u2019efficacit\u00e9 thermique au cours de leur utilisation. En effet, l\u2019encrassement constitue un probl\u00e8me \u00e9conomique et technologique majeur et &hellip;<\/p>","protected":false},"author":1,"featured_media":966,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,21],"tags":[],"class_list":["post-1094","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-documents","category-memoires-theses"],"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>D\u00e9veloppement, \u00e9tude de performances et int\u00e9gration de sondes thermiques pour la caract\u00e9risation de l\u2019encrassement d\u2019\u00e9changeurs tubulaires \u00e0 courants crois\u00e9s - 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\/developpement-etude-de-performances-et-integration-de-sondes-thermiques-pour-la-caracterisation-de-lencrassement-dechangeurs-tubulaires-a-courants-croises\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D\u00e9veloppement, \u00e9tude de performances et int\u00e9gration de sondes thermiques pour la caract\u00e9risation de l\u2019encrassement d\u2019\u00e9changeurs tubulaires \u00e0 courants crois\u00e9s\" \/>\n<meta property=\"og:description\" content=\"R\u00e9sum\u00e9 : Depuis la fin des ann\u00e9es 1970, les \u00e9changeurs de chaleur ont connu de nouvelles applications li\u00e9es \u00e0 la n\u00e9cessit\u00e9 d\u2019optimiser les d\u00e9penses \u00e9nerg\u00e9tiques. L\u2019encrassement de tels \u00e9changeurs est l\u2019une des causes principales de leur perte d\u2019efficacit\u00e9 thermique au cours de leur utilisation. En effet, l\u2019encrassement constitue un probl\u00e8me \u00e9conomique et technologique majeur et &hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/greth.fr\/en\/developpement-etude-de-performances-et-integration-de-sondes-thermiques-pour-la-caracterisation-de-lencrassement-dechangeurs-tubulaires-a-courants-croises\/\" \/>\n<meta property=\"og:site_name\" content=\"GRETh\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/grethfr\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/grethfr\/\" \/>\n<meta property=\"article:published_time\" content=\"2003-08-10T09:50:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-02-24T13:17:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/greth.fr\/wp-content\/uploads\/2015\/08\/theses-10.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"424\" \/>\n\t<meta property=\"og:image:height\" content=\"283\" \/>\n\t<meta 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