{"id":47923,"date":"2019-11-07T08:20:46","date_gmt":"2019-11-07T07:20:46","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-turbina-lp-turbina-a-vapor-de-baixa-pressao-definicao\/"},"modified":"2020-01-26T09:16:19","modified_gmt":"2020-01-26T08:16:19","slug":"o-que-e-turbina-lp-turbina-a-vapor-de-baixa-pressao-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-turbina-lp-turbina-a-vapor-de-baixa-pressao-definicao\/","title":{"rendered":"O que \u00e9 turbina LP &#8211; Turbina a vapor de baixa press\u00e3o &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">A turbina LP (turbina de baixa press\u00e3o) \u00e9 geralmente turbina de rea\u00e7\u00e3o de fluxo duplo com cerca de 5-8 est\u00e1gios (com l\u00e2minas encobertas e com l\u00e2minas independentes dos \u00faltimos 3 est\u00e1gios). Engenharia T\u00e9rmica<\/div>\n<\/div>\n<div><\/div>\n<div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-50 lgc-tablet-grid-50 lgc-mobile-grid-100 lgc-equal-heights  lgc-first\">\n<div class=\"inside-grid-column\">\n<h2><span>Turbina LP &#8211; Turbina a vapor de baixa press\u00e3o<\/span><\/h2>\n<p><span>A maioria das\u00a0<\/span><strong><span>usinas nucleares<\/span><\/strong><span>\u00a0opera um\u00a0<\/span><strong><span>gerador de turbina de eixo \u00fanico<\/span><\/strong><span>\u00a0que consiste em uma\u00a0<\/span><strong><span>turbina HP de v\u00e1rios est\u00e1gios<\/span><\/strong><span>\u00a0e\u00a0<\/span><strong><span>tr\u00eas turbinas LP de v\u00e1rios est\u00e1gios paralelos<\/span><\/strong><span>\u00a0, um gerador principal e um excitador.<\/span><\/p>\n<p><span>Cada\u00a0<\/span><strong><span>turbina LP<\/span><\/strong><span>\u00a0(\u00a0<strong>turbina de<\/strong>\u00a0baixa press\u00e3o) \u00e9 geralmente turbina de rea\u00e7\u00e3o de fluxo duplo com cerca de 5-8 est\u00e1gios (com l\u00e2minas encobertas e com l\u00e2minas independentes dos \u00faltimos 3 est\u00e1gios).\u00a0As turbinas LP produzem aproximadamente 60-70% da produ\u00e7\u00e3o bruta de energia da unidade da usina.\u00a0Cada rotor de turbina \u00e9 montado em dois mancais, ou seja, h\u00e1 mancais duplos entre cada elemento da turbina.<\/span><\/p>\n<p><span>A turbina LP \u00e9 equipada geralmente com 3 ou 4 linhas de extra\u00e7\u00e3o autorregul\u00e1veis, usadas para fornecer vapor para:<\/span><\/p>\n<ul>\n<li><span>aquecedores de \u00e1gua de alimenta\u00e7\u00e3o de baixa press\u00e3o<\/span><\/li>\n<\/ul>\n<p><span>Na turbina LP, o est\u00e1gio de baixa press\u00e3o recebe\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-o-steam-propriedades-do-steam-definicao\/\"><span>vapor<\/span><\/a><span>\u00a0(esse vapor \u00e9 geralmente superaquecido &#8211; ponto E na figura; ~\u00a0<\/span><strong><span>1,15 MPa<\/span><\/strong><span>\u00a0; 250 \u00b0 C) de um separador-reaquecedor de umidade (MSR).\u00a0O vapor da turbina HP deve ser reaquecido para evitar danos que possam ser causados \u200b\u200b\u00e0s p\u00e1s da turbina a vapor por vapor de\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-steam-what-is-steam\/vapor-quality-dryness-fraction\/\"><span>baixa qualidade<\/span><\/a><span>\u00a0.\u00a0O alto conte\u00fado de got\u00edculas de \u00e1gua pode causar o r\u00e1pido impacto e a eros\u00e3o das p\u00e1s, que ocorre quando a \u00e1gua condensada \u00e9 jateada sobre as p\u00e1s.\u00a0O vapor sem umidade \u00e9 superaquecido pelo vapor de extra\u00e7\u00e3o do est\u00e1gio de alta press\u00e3o da turbina e pelo vapor diretamente das principais linhas de vapor.<\/span><\/p>\n<p><span>Na turbina de baixa press\u00e3o, o vapor expande continuamente do ponto E para F. O vapor exaurido condensa no condensador e est\u00e1 a uma press\u00e3o bem abaixo da atmosf\u00e9rica (press\u00e3o absoluta de\u00a0<\/span><strong><span>0,008 MPa<\/span><\/strong><span>\u00a0).\u00a0O vapor est\u00e1 em um estado parcialmente condensado (ponto F), normalmente com uma qualidade pr\u00f3xima a 90%.\u00a0Os est\u00e1gios de alta press\u00e3o e baixa press\u00e3o da turbina geralmente est\u00e3o no mesmo eixo para acionar um gerador comum, mas eles t\u00eam casos separados.\u00a0O gerador principal produz energia el\u00e9trica, que \u00e9 fornecida \u00e0 rede el\u00e9trica.<\/span><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-50 lgc-tablet-grid-50 lgc-mobile-grid-100 lgc-equal-heights  lgc-last\">\n<div class=\"inside-grid-column\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Steam-Turbine-types.png\"><img loading=\"lazy\" class=\"aligncenter size-medium wp-image-17901 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Steam-Turbine-types-300x194.png\" alt=\"Turbina a vapor - tipos\" width=\"300\" height=\"194\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Steam-Turbine-types-300x194.png\" \/><\/a><\/p>\n<figure id=\"attachment_17781\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-17781\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Rankine-Cycle-Ts-diagram.png\"><img loading=\"lazy\" class=\"size-full wp-image-17781 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Rankine-Cycle-Ts-diagram.png\" alt=\"Ciclo de Rankine - diagrama de Ts\" width=\"649\" height=\"598\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Rankine-Cycle-Ts-diagram.png\" \/><\/a><figcaption id=\"caption-attachment-17781\" class=\"wp-caption-text\"><span>Ciclo de Rankine &#8211; diagrama de Ts<\/span><\/figcaption><\/figure>\n<div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus su-spoiler-closed\">\n<div class=\"su-spoiler-content su-clearfix\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<div><\/div>\n<div><\/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<figure id=\"attachment_17846\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-17846\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Steam-Turbine-scheme-min.png\"><img loading=\"lazy\" class=\"size-large wp-image-17846 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Steam-Turbine-scheme-min-1024x529.png\" alt=\"Turbina a vapor de 3000MWth PWR t\u00edpico\" width=\"669\" height=\"346\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Steam-Turbine-scheme-min-1024x529.png\" \/><\/a><figcaption id=\"caption-attachment-17846\" class=\"wp-caption-text\"><span><br \/>\nEsquema de uma turbina a vapor de um t\u00edpico 3000MWth PWR.<\/span><\/figcaption><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<div><\/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>Este artigo \u00e9 baseado na tradu\u00e7\u00e3o autom\u00e1tica do artigo original em ingl\u00eas. Para mais informa\u00e7\u00f5es, consulte o artigo em ingl\u00eas. Voc\u00ea pode nos ajudar. Se voc\u00ea deseja corrigir a tradu\u00e7\u00e3o, envie-a para: translations@nuclear-power.com ou preencha o formul\u00e1rio de tradu\u00e7\u00e3o on-line. Agradecemos sua ajuda, atualizaremos a tradu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel. Obrigado.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A turbina LP (turbina de baixa press\u00e3o) \u00e9 geralmente turbina de rea\u00e7\u00e3o de fluxo duplo com cerca de 5-8 est\u00e1gios (com l\u00e2minas encobertas e com l\u00e2minas independentes dos \u00faltimos 3 est\u00e1gios). Engenharia T\u00e9rmica Turbina LP &#8211; Turbina a vapor de baixa press\u00e3o A maioria das\u00a0usinas nucleares\u00a0opera um\u00a0gerador de turbina de eixo \u00fanico\u00a0que consiste em uma\u00a0turbina &#8230; <a title=\"O que \u00e9 turbina LP &#8211; Turbina a vapor de baixa press\u00e3o &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-turbina-lp-turbina-a-vapor-de-baixa-pressao-definicao\/\" aria-label=\"More on O que \u00e9 turbina LP &#8211; Turbina a vapor de baixa press\u00e3o &#8211; Defini\u00e7\u00e3o\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>O que \u00e9 turbina LP - Turbina a vapor de baixa press\u00e3o - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"A turbina LP (turbina de baixa press\u00e3o) \u00e9 geralmente turbina de rea\u00e7\u00e3o de fluxo duplo com cerca de 5-8 est\u00e1gios (com l\u00e2minas encobertas e com l\u00e2minas independentes dos \u00faltimos 3 est\u00e1gios). 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