{"id":46744,"date":"2019-11-01T05:37:28","date_gmt":"2019-11-01T04:37:28","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/quest-ce-que-la-classification-de-la-perte-de-tete-definition\/"},"modified":"2020-03-03T07:13:27","modified_gmt":"2020-03-03T06:13:27","slug":"quest-ce-que-la-classification-de-la-perte-de-tete-definition","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-la-classification-de-la-perte-de-tete-definition\/","title":{"rendered":"Qu&#8217;est-ce que la classification de la perte de t\u00eate &#8211; D\u00e9finition"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Classification de la perte de charge. La perte de charge du syst\u00e8me de tuyauterie est divis\u00e9e en deux cat\u00e9gories principales, les pertes majeures et les pertes de charge minod. G\u00e9nie thermique<\/div>\n<\/div>\n<div><\/div>\n<div><\/div>\n<div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-60 lgc-tablet-grid-60 lgc-mobile-grid-100 lgc-equal-heights  lgc-first\">\n<div class=\"inside-grid-column\">\n<h2><span>Classification de la perte de t\u00eate<\/span><\/h2>\n<p><strong><span>La perte<\/span><\/strong><span>\u00a0de charge d&#8217;un syst\u00e8me de tuyaux, de tubes ou de conduits est la m\u00eame que celle produite dans un tuyau ou un conduit droit dont la longueur est \u00e9gale aux tuyaux des syst\u00e8mes d&#8217;origine plus la somme des longueurs \u00e9quivalentes de tous les composants du syst\u00e8me.<\/span><\/p>\n<p><span>Comme on peut le voir, la perte de charge du syst\u00e8me de tuyauterie est divis\u00e9e en deux cat\u00e9gories principales, les \u00ab\u00a0<\/span><strong><span>pertes majeures<\/span><\/strong><span>\u00a0\u00bb associ\u00e9es \u00e0 la perte d&#8217;\u00e9nergie par longueur de tuyau et les \u00ab\u00a0<\/span><strong><span>pertes mineures<\/span><\/strong><span>\u00a0\u00bb associ\u00e9es aux coudes, raccords, vannes, etc.<\/span><\/p>\n<ul>\n<li><strong><span>Perte de charge importante<\/span><\/strong><span>\u00a0&#8211; due au frottement dans les tuyaux et les conduits.<\/span><\/li>\n<li><strong><span>Perte de charge mineure<\/span><\/strong><span>\u00a0&#8211; due \u00e0 des composants comme des vannes, des raccords, des coudes et des t\u00e9s.<\/span><\/li>\n<\/ul>\n<p><span>La perte de charge peut alors \u00eatre exprim\u00e9e comme:<\/span><\/p>\n<p><strong><em><span>h\u00a0<\/span><\/em><em><sub><span>loss<\/span><\/sub><\/em><em><span>\u00a0= \u03a3 h\u00a0<\/span><\/em><em><sub><span>major_losses<\/span><\/sub><\/em><em><span>\u00a0+ \u03a3 h\u00a0<\/span><\/em><em><sub><span>minor_losses<\/span><\/sub><\/em><\/strong><\/p>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-40 lgc-tablet-grid-40 lgc-mobile-grid-100 lgc-equal-heights  lgc-last\">\n<div class=\"inside-grid-column\">\n<h2><span>Sommaire:<\/span><\/h2>\n<ul>\n<li><strong><span>La perte de charge<\/span><\/strong><span>\u00a0ou\u00a0<\/span><strong><span>la perte de pression<\/span><\/strong><span>\u00a0sont la r\u00e9duction de la\u00a0<\/span><a title=\"T\u00eate hydraulique\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/bernoullis-equation-bernoullis-principle\/hydraulic-head\/\"><strong><span>hauteur totale<\/span><\/strong><\/a><span>\u00a0(somme de la hauteur\u00a0<\/span><a title=\"T\u00eate d'\u00e9l\u00e9vation\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/bernoullis-equation-bernoullis-principle\/elevation-head-2\/\"><span>potentielle<\/span><\/a><span>\u00a0, de la\u00a0<\/span><a title=\"T\u00eate de vitesse\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/bernoullis-equation-bernoullis-principle\/velocity-head\/\"><span>vitesse<\/span><\/a><span>\u00a0et de la\u00a0<\/span><a title=\"T\u00eate de pression\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/bernoullis-equation-bernoullis-principle\/pressure-head-2\/\"><span>pression<\/span><\/a><span>\u00a0) d&#8217;un fluide caus\u00e9e par la\u00a0<\/span><strong><span>friction<\/span><\/strong><span>\u00a0pr\u00e9sente dans le mouvement du fluide.<\/span><\/li>\n<li><strong><span>La perte de charge et la perte de charge<\/span><\/strong><span>\u00a0repr\u00e9sentent le m\u00eame ph\u00e9nom\u00e8ne &#8211; les\u00a0<\/span><strong><span>pertes par frottement<\/span><\/strong><span>\u00a0dans les tuyaux et les pertes dans les composants hydrauliques, mais elles sont exprim\u00e9es en\u00a0<\/span><strong><span>unit\u00e9s diff\u00e9rentes<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<li><span>La perte de charge du syst\u00e8me hydraulique est divis\u00e9e en\u00a0<\/span><strong><span>deux cat\u00e9gories principales<\/span><\/strong><span>\u00a0:<\/span>\n<ul>\n<li><strong><span>Perte de charge importante<\/span><\/strong><span>\u00a0&#8211; due au frottement dans des tuyaux droits<\/span><\/li>\n<li><strong><span>Perte de charge mineure<\/span><\/strong><span>\u00a0&#8211; due \u00e0 des composants comme des valves, des coudes\u2026<\/span><\/li>\n<\/ul>\n<\/li>\n<li><strong><span>L&#8217;\u00e9quation de Darcy<\/span><\/strong><span>\u00a0peut \u00eatre utilis\u00e9e pour calculer\u00a0<\/span><strong><span>les pertes majeures<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<li><span>Une\u00a0<\/span><strong><span>forme sp\u00e9ciale de l&#8217;\u00e9quation de Darcy<\/span><\/strong><span>\u00a0peut \u00eatre utilis\u00e9e pour calculer\u00a0<\/span><strong><span>les pertes mineures<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<li><span>Le\u00a0<\/span><strong><span>facteur de friction<\/span><\/strong><span>\u00a0pour l&#8217;\u00e9coulement du fluide peut \u00eatre d\u00e9termin\u00e9 \u00e0 l&#8217;aide d&#8217;un\u00a0<\/span><strong><span>diagramme de Moody<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights  lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<h2><span>Pourquoi la perte de t\u00eate est tr\u00e8s importante?<\/span><\/h2>\n<p><span>Comme on peut le voir sur la photo, la perte de charge est\u00a0<\/span><strong><span>une caract\u00e9ristique cl\u00e9<\/span><\/strong><span>\u00a0de tout syst\u00e8me hydraulique.\u00a0Dans les syst\u00e8mes dans lesquels un certain d\u00e9bit doit \u00eatre maintenu (par exemple pour assurer un refroidissement ou un transfert de chaleur suffisant \u00e0 partir d&#8217;un\u00a0<\/span><a title=\"Noyau du r\u00e9acteur\" href=\"https:\/\/www.reactor-physics.com\/what-is-reactor-core-definition\/\"><span>c\u0153ur de r\u00e9acteur<\/span><\/a><span>\u00a0),\u00a0<\/span><strong><span>l&#8217;\u00e9quilibre<\/span><\/strong><span>\u00a0de la\u00a0<\/span><strong><span>perte de charge<\/span><\/strong><span>\u00a0et de la\u00a0\u00a0<\/span><strong><span>t\u00eate ajout\u00e9e<\/span><\/strong><span>\u00a0par une pompe d\u00e9termine le d\u00e9bit \u00e0 travers le syst\u00e8me.<\/span><\/p>\n<figure id=\"attachment_14299\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-14299\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Hydraulic-Head-Q-H.png\"><img loading=\"lazy\" class=\"size-medium wp-image-14299 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Hydraulic-Head-Q-H-300x207.png\" alt=\"Diagramme caract\u00e9ristique QH de la pompe centrifuge et de la canalisation\" width=\"300\" height=\"207\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Hydraulic-Head-Q-H-300x207.png\" \/><\/a><figcaption id=\"caption-attachment-14299\" class=\"wp-caption-text\"><span>Diagramme caract\u00e9ristique QH de la pompe centrifuge et de la canalisation<\/span><\/figcaption><\/figure>\n<figure id=\"attachment_14305\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-14305\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Hydraulic-Head-Hydraulic-Grade-Line-min.png\"><img loading=\"lazy\" class=\"size-medium wp-image-14305 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Hydraulic-Head-Hydraulic-Grade-Line-min-300x230.png\" alt=\"T\u00eate hydraulique - Ligne de qualit\u00e9 hydraulique\" width=\"300\" height=\"230\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Hydraulic-Head-Hydraulic-Grade-Line-min-300x230.png\" \/><\/a><figcaption id=\"caption-attachment-14305\" class=\"wp-caption-text\"><span>Ligne de qualit\u00e9 hydraulique et lignes de t\u00eate totales pour un tuyau de diam\u00e8tre constant avec friction.\u00a0Dans une conduite r\u00e9elle, il y a des pertes d&#8217;\u00e9nergie dues au frottement &#8211; celles-ci doivent \u00eatre prises en compte car elles peuvent \u00eatre tr\u00e8s importantes.<\/span><\/figcaption><\/figure>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights  lgc-first lgc-last\">\n<div class=\"inside-grid-column\"><\/div>\n<\/div>\n<\/div>\n<div><\/div>\n<div>\n<p>&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.<\/p>\n<p>Cet article est bas\u00e9 sur la traduction automatique de l&#8217;article original en anglais. Pour plus d&#8217;informations, voir l&#8217;article en anglais. Pouvez vous nous aider Si vous souhaitez corriger la traduction, envoyez-la \u00e0 l&#8217;adresse: translations@nuclear-power.com ou remplissez le formulaire de traduction en ligne. Nous appr\u00e9cions votre aide, nous mettrons \u00e0 jour la traduction le plus rapidement possible. Merci<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Classification de la perte de charge. La perte de charge du syst\u00e8me de tuyauterie est divis\u00e9e en deux cat\u00e9gories principales, les pertes majeures et les pertes de charge minod. G\u00e9nie thermique Classification de la perte de t\u00eate La perte\u00a0de charge d&#8217;un syst\u00e8me de tuyaux, de tubes ou de conduits est la m\u00eame que celle produite &#8230; <a title=\"Qu&#8217;est-ce que la classification de la perte de t\u00eate &#8211; D\u00e9finition\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-la-classification-de-la-perte-de-tete-definition\/\" aria-label=\"En savoir plus sur Qu&#8217;est-ce que la classification de la perte de t\u00eate &#8211; D\u00e9finition\">Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est-ce que la classification de la perte de t\u00eate - D\u00e9finition<\/title>\n<meta name=\"description\" content=\"Classification de la perte de charge. 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