{"id":46193,"date":"2019-10-21T04:12:08","date_gmt":"2019-10-21T03:12:08","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/quest-ce-que-la-pression-typique-en-genie-exemples-definition\/"},"modified":"2020-02-26T15:01:35","modified_gmt":"2020-02-26T14:01:35","slug":"quest-ce-que-la-pression-typique-en-genie-exemples-definition","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-la-pression-typique-en-genie-exemples-definition\/","title":{"rendered":"Qu&#8217;est-ce que la pression typique en g\u00e9nie &#8211; Exemples &#8211; D\u00e9finition"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Les pressions typiques en ing\u00e9nierie et quelques exemples sont r\u00e9sum\u00e9s ici.\u00a0Pour la plupart des probl\u00e8mes d\u2019ing\u00e9nierie, pascal (Pa) est une unit\u00e9 assez petite, donc kPa et MPa sont utilis\u00e9s.\u00a0G\u00e9nie thermique<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/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<div class=\"su-spacer\"><\/div>\n<h2>Pressions typiques en ing\u00e9nierie &#8211; exemples<\/h2>\n<p><span>Le\u00a0<\/span><a title=\"Pascal - Unit\u00e9 de pression\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-pressure-physics\/pascal-unit-of-pressure\/\"><strong><span>pascal (Pa) en<\/span><\/strong><\/a><span>\u00a0tant qu&#8217;unit\u00e9 de\u00a0mesure\u00a0de\u00a0<\/span><a title=\"Qu'est-ce que la pression - Physique\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-pressure-physics\/\"><span>pression<\/span><\/a><span>\u00a0est largement utilis\u00e9 dans le monde et a largement remplac\u00e9 l&#8217;\u00a0<\/span><strong><span>unit\u00e9 de livres par pouce carr\u00e9 (psi)<\/span><\/strong><span>\u00a0, sauf dans certains pays qui utilisent encore le syst\u00e8me de mesure imp\u00e9rial, y compris les \u00c9tats-Unis.\u00a0Pour la plupart des probl\u00e8mes d&#8217;ing\u00e9nierie, le pascal (Pa) est une unit\u00e9 assez petite, il est donc pratique de travailler avec des multiples du pascal: le kPa, le MPa ou la barre.\u00a0La liste suivante r\u00e9sume quelques exemples:<\/span><\/p>\n<ul>\n<li><span>La plupart des\u00a0<\/span><strong><span>centrales nucl\u00e9aires<\/span><\/strong><span>\u00a0exploitent g\u00e9n\u00e9ralement\u00a0<\/span><strong><span>des turbines \u00e0 vapeur \u00e0 condensation \u00e0 plusieurs \u00e9tages<\/span><\/strong><span>\u00a0.\u00a0Ces turbines \u00e9vacuent la\u00a0<\/span><a title=\"Propri\u00e9t\u00e9s de Steam - Qu'est-ce que Steam\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-steam-proprietes-de-steam-definition\/\"><span>vapeur<\/span><\/a><span>\u00a0\u00e0 une pression bien inf\u00e9rieure \u00e0 la pression atmosph\u00e9rique (par exemple \u00e0 0,08 bar ou 8 kPa ou 1,16 psia) et dans un \u00e9tat partiellement condens\u00e9.\u00a0En unit\u00e9s relatives, il s&#8217;agit d&#8217;une pression manom\u00e9trique n\u00e9gative d&#8217;environ &#8211; 0,92 bar, &#8211; 92 kPa ou &#8211; 13,54 psig.<\/span><\/li>\n<li><span>La\u00a0<\/span><strong><span>pression atmosph\u00e9rique standard se<\/span><\/strong><span>\u00a0rapproche de la pression moyenne au niveau de la mer \u00e0 45 \u00b0 de latitude nord. La\u00a0<\/span><strong><span>pression atmosph\u00e9rique standard<\/span><\/strong><span>\u00a0est d\u00e9finie au niveau de la mer \u00e0\u00a0<\/span><em><span>273\u00a0<\/span><\/em><em><sup><span>o<\/span><\/sup><\/em><em><span>\u00a0K (0\u00a0<\/span><\/em><em><sup><span>o<\/span><\/sup><\/em><em><span>\u00a0C)<\/span><\/em><span>\u00a0et est:<\/span>\n<ul>\n<li><strong><em><span>101325 Pa<\/span><\/em><\/strong><\/li>\n<li><strong><em><span>1.01325 bar<\/span><\/em><\/strong><\/li>\n<li><strong><em><span>14,696 psi<\/span><\/em><\/strong><\/li>\n<li><strong><em><span>760 mmHg<\/span><\/em><\/strong><\/li>\n<li><strong><em><span>760 torr<\/span><\/em><\/strong><\/li>\n<\/ul>\n<\/li>\n<li><span>La surpression des pneus de voiture est d&#8217;environ 2,5 bars, 0,25 MPa ou 36 psig.<\/span><\/li>\n<li><span>Chaudi\u00e8re \u00e0 tube de fum\u00e9e de locomotive \u00e0 vapeur: 150\u2013250 psig<\/span><\/li>\n<li><span>Un \u00e9tage haute pression de turbine \u00e0 vapeur \u00e0 condensation dans une centrale nucl\u00e9aire fonctionne \u00e0 l&#8217;\u00e9tat d&#8217;\u00e9quilibre avec des conditions d&#8217;entr\u00e9e de 6 MPa (60 bar ou 870 psig), t = 275,6 \u00b0 C, x = 1<\/span><\/li>\n<li><span>Un\u00a0<\/span><a title=\"BWR - R\u00e9acteur \u00e0 eau bouillante\" href=\"https:\/\/www.nuclear-power.com\/bwr-boiling-water-reactor\/\"><strong><span>r\u00e9acteur \u00e0 eau bouillante<\/span><\/strong><\/a><span>\u00a0est refroidi et mod\u00e9r\u00e9 par de l&#8217;\u00a0<\/span><a title=\"Propri\u00e9t\u00e9s de l'eau\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-of-water\/\"><span>eau<\/span><\/a><span>\u00a0comme un REP, mais \u00e0 une\u00a0<\/span><strong><span>pression inf\u00e9rieure<\/span><\/strong><span>\u00a0(par exemple 7 MPa, 70 bars ou 1015 psig), ce qui permet \u00e0 l&#8217;eau de bouillir \u00e0 l&#8217;int\u00e9rieur du r\u00e9cipient sous pression, produisant la vapeur qui fait fonctionner les turbines.<\/span><\/li>\n<li><a title=\"PWR - R\u00e9acteur \u00e0 eau sous pression\" href=\"https:\/\/www.nuclear-power.com\/pwr-pressurized-water-reactor\/\"><strong><span>Les r\u00e9acteurs \u00e0 eau sous pression<\/span><\/strong><\/a><span>\u00a0sont refroidis et mod\u00e9r\u00e9s par<\/span><a title=\"Liquide satur\u00e9 et sous-refroidi\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-steam-what-is-steam\/saturated-and-subcooled-liquid\/\"><span>\u00a0de l&#8217;eau liquide \u00e0 haute pression<\/span><\/a><span>\u00a0(par exemple 16 MPa, 160 bars ou 2320 psig).\u00a0\u00c0 cette pression, l&#8217;eau bout \u00e0 environ 350 \u00b0 C (662 \u00b0 F), ce qui fournit une marge de sous-refroidissement d&#8217;environ 25 \u00b0 C.<\/span><\/li>\n<li><span>Le\u00a0<\/span><a title=\"R\u00e9acteur \u00e0 eau supercritique - SCWR\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/reactor-types\/supercritical-water-reactor-scwr\/\"><strong><span>r\u00e9acteur \u00e0 eau supercritique (SCWR)<\/span><\/strong><\/a><span>\u00a0fonctionne \u00e0\u00a0<\/span><strong><span>pression supercritique<\/span><\/strong><span>\u00a0.\u00a0Le terme supercritique dans ce contexte se r\u00e9f\u00e8re au\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-of-water\/critical-point-of-water\/\"><strong><span>point critique<\/span><\/strong><\/a><span>\u00a0thermodynamique\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-of-water\/critical-point-of-water\/\"><strong>de l&#8217;eau<\/strong><\/a>\u00a0(T\u00a0<\/span><sub><span>CR<\/span><\/sub><span>\u00a0= 374 \u00b0 C; p\u00a0<\/span><sub><span>CR<\/span><\/sub><span>\u00a0= 22,1 MPa)<\/span><\/li>\n<li><strong><span>Injection directe de carburant \u00e0 rampe commune:<\/span><\/strong><span>\u00a0sur les moteurs diesel, elle est dot\u00e9e d&#8217;une\u00a0<strong>rampe d&#8217;alimentation<\/strong>\u00a0haute pression (sup\u00e9rieure \u00e0 1 000 bar ou 100 MPa ou 14500 psi).<\/span><\/li>\n<\/ul>\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>Les pressions typiques en ing\u00e9nierie et quelques exemples sont r\u00e9sum\u00e9s ici.\u00a0Pour la plupart des probl\u00e8mes d\u2019ing\u00e9nierie, pascal (Pa) est une unit\u00e9 assez petite, donc kPa et MPa sont utilis\u00e9s.\u00a0G\u00e9nie thermique Pressions typiques en ing\u00e9nierie &#8211; exemples Le\u00a0pascal (Pa) en\u00a0tant qu&#8217;unit\u00e9 de\u00a0mesure\u00a0de\u00a0pression\u00a0est largement utilis\u00e9 dans le monde et a largement remplac\u00e9 l&#8217;\u00a0unit\u00e9 de livres par pouce &#8230; <a title=\"Qu&#8217;est-ce que la pression typique en g\u00e9nie &#8211; Exemples &#8211; D\u00e9finition\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/fr\/quest-ce-que-la-pression-typique-en-genie-exemples-definition\/\" aria-label=\"En savoir plus sur Qu&#8217;est-ce que la pression typique en g\u00e9nie &#8211; Exemples &#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 pression typique en g\u00e9nie - Exemples - D\u00e9finition<\/title>\n<meta name=\"description\" content=\"Les pressions typiques en ing\u00e9nierie et quelques exemples sont r\u00e9sum\u00e9s ici. 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