{"id":49121,"date":"2019-11-14T15:45:01","date_gmt":"2019-11-14T14:45:01","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-classificacao-de-perda-de-cabeca-definicao\/"},"modified":"2020-02-01T20:15:32","modified_gmt":"2020-02-01T19:15:32","slug":"o-que-e-classificacao-de-perda-de-cabeca-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-classificacao-de-perda-de-cabeca-definicao\/","title":{"rendered":"O que \u00e9 classifica\u00e7\u00e3o de perda de cabe\u00e7a &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Classifica\u00e7\u00e3o da perda de carga. O sistema de perda de carga da tubula\u00e7\u00e3o \u00e9 dividido em duas categorias principais, perdas maiores e perdas de carga m\u00ednimas. Engenharia T\u00e9rmica<\/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>Classifica\u00e7\u00e3o da perda de cabe\u00e7a<\/span><\/h2>\n<p><strong><span>A perda<\/span><\/strong><span>\u00a0de\u00a0<strong>carga<\/strong>\u00a0de um sistema de tubula\u00e7\u00e3o \u00e9 igual \u00e0 produzida em uma tubula\u00e7\u00e3o reta, cujo comprimento \u00e9 igual aos tubos dos sistemas originais mais a soma dos comprimentos equivalentes de todos os componentes do sistema.<\/span><\/p>\n<p><span>Como pode ser visto, a perda de carga do sistema de tubula\u00e7\u00e3o \u00e9 dividida em duas categorias principais, \u201c\u00a0<\/span><strong><span>grandes perdas<\/span><\/strong><span>\u00a0\u201d associadas \u00e0 perda de energia por comprimento de tubo e \u201c\u00a0<\/span><strong><span>pequenas perdas<\/span><\/strong><span>\u00a0\u201d associadas a curvas, conex\u00f5es, v\u00e1lvulas, etc.<\/span><\/p>\n<ul>\n<li><strong><span>Perda<\/span><\/strong><span>\u00a0de carga\u00a0<strong>principal<\/strong>\u00a0&#8211; devido ao atrito em tubula\u00e7\u00f5es e dutos.<\/span><\/li>\n<li><strong><span>Menor perda de carga<\/span><\/strong><span>\u00a0&#8211; devido a componentes como v\u00e1lvulas, conex\u00f5es, dobras e T.<\/span><\/li>\n<\/ul>\n<p><span>A perda de carga pode ent\u00e3o ser expressa como:<\/span><\/p>\n<p><strong><em><span>h\u00a0<\/span><\/em><em><sub><span>perda<\/span><\/sub><\/em><em><span>\u00a0= \u03a3 h\u00a0<\/span><\/em><em><sub><span>principais_perdi\u00e7\u00f5es<\/span><\/sub><\/em><em><span>\u00a0+ \u03a3 h\u00a0<\/span><\/em><em><sub><span>menores_perdi\u00e7\u00f5es<\/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>Resumo:<\/span><\/h2>\n<ul>\n<li><strong><span>Perda de carga<\/span><\/strong><span>\u00a0ou\u00a0<\/span><strong><span>perda de press\u00e3o<\/span><\/strong><span>\u00a0s\u00e3o a redu\u00e7\u00e3o na\u00a0<\/span><a title=\"Cabe\u00e7a hidr\u00e1ulica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/bernoullis-equation-bernoullis-principle\/hydraulic-head\/\"><strong><span>carga total<\/span><\/strong><\/a><span>\u00a0(soma da\u00a0<\/span><a title=\"Cabe\u00e7a de eleva\u00e7\u00e3o\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/bernoullis-equation-bernoullis-principle\/elevation-head-2\/\"><span>cabe\u00e7a potencial<\/span><\/a><span>\u00a0,\u00a0<\/span><a title=\"Cabe\u00e7a de velocidade\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/bernoullis-equation-bernoullis-principle\/velocity-head\/\"><span>cabe\u00e7a de velocidade<\/span><\/a><span>\u00a0, e\u00a0<\/span><a title=\"Cabe\u00e7a de press\u00e3o\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/bernoullis-equation-bernoullis-principle\/pressure-head-2\/\"><span>cabe\u00e7a de press\u00e3o<\/span><\/a><span>\u00a0) de um fluido causado pelo\u00a0<\/span><strong><span>atrito<\/span><\/strong><span>\u00a0presente no movimento do fluido.<\/span><\/li>\n<li><strong><span>Perda de carga e perda de press\u00e3o<\/span><\/strong><span>\u00a0representam o mesmo fen\u00f4meno &#8211;\u00a0<\/span><strong><span>perdas por atrito<\/span><\/strong><span>\u00a0em tubula\u00e7\u00f5es e perdas em componentes hidr\u00e1ulicos, mas s\u00e3o expressas em\u00a0<\/span><strong><span>unidades diferentes<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<li><span>A perda de carga do sistema hidr\u00e1ulico \u00e9 dividida em\u00a0<\/span><strong><span>duas categorias principais<\/span><\/strong><span>\u00a0:<\/span>\n<ul>\n<li><strong><span>Perda de Cabe\u00e7a Maior<\/span><\/strong><span>\u00a0&#8211; devido ao atrito em tubos retos<\/span><\/li>\n<li><strong><span>Menor perda de carga<\/span><\/strong><span>\u00a0&#8211; devido a componentes como v\u00e1lvulas, curvas\u2026<\/span><\/li>\n<\/ul>\n<\/li>\n<li><strong><span>A equa\u00e7\u00e3o de Darcy<\/span><\/strong><span>\u00a0pode ser usada para calcular\u00a0<\/span><strong><span>grandes perdas<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<li><span>Uma\u00a0<\/span><strong><span>forma especial da equa\u00e7\u00e3o de Darcy<\/span><\/strong><span>\u00a0pode ser usada para calcular\u00a0<\/span><strong><span>pequenas perdas<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<li><span>O\u00a0<\/span><strong><span>fator de atrito<\/span><\/strong><span>\u00a0para o fluxo de fluido pode ser determinado usando um\u00a0<\/span><strong><span>gr\u00e1fico Moody<\/span><\/strong><span>\u00a0.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\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>Por que a perda de cabe\u00e7a \u00e9 muito importante?<\/span><\/h2>\n<p><span>Como pode ser visto na figura, a perda de carga \u00e9 a\u00a0<\/span><strong><span>principal caracter\u00edstica<\/span><\/strong><span>\u00a0de qualquer sistema hidr\u00e1ulico.\u00a0Nos sistemas em que uma certa vaz\u00e3o deve ser mantida (por exemplo, para fornecer refrigera\u00e7\u00e3o ou transfer\u00eancia de calor suficiente a partir do\u00a0<\/span><a title=\"N\u00facleo do reator\" href=\"https:\/\/www.reactor-physics.com\/what-is-reactor-core-definition\/\"><span>n\u00facleo do reator<\/span><\/a><span>\u00a0),\u00a0<\/span><strong><span>o equil\u00edbrio<\/span><\/strong><span>\u00a0da\u00a0<\/span><strong><span>perda de carga<\/span><\/strong><span>\u00a0e da\u00a0\u00a0<\/span><strong><span>carga adicionada<\/span><\/strong><span>\u00a0por uma bomba determina a vaz\u00e3o atrav\u00e9s do sistema.<\/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=\"Diagrama caracter\u00edstico de QH da bomba centr\u00edfuga e do gasoduto\" 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>Diagrama caracter\u00edstico de QH da bomba centr\u00edfuga e do gasoduto<\/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=\"Cabe\u00e7a Hidr\u00e1ulica - Linha Hidr\u00e1ulica\" 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>Linha de classifica\u00e7\u00e3o hidr\u00e1ulica e linhas de cabe\u00e7ote total para um tubo de di\u00e2metro constante com atrito.\u00a0Em uma tubula\u00e7\u00e3o real, h\u00e1 perdas de energia devido ao atrito &#8211; elas devem ser levadas em considera\u00e7\u00e3o, pois podem ser muito significativas.<\/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>Classifica\u00e7\u00e3o da perda de carga. O sistema de perda de carga da tubula\u00e7\u00e3o \u00e9 dividido em duas categorias principais, perdas maiores e perdas de carga m\u00ednimas. Engenharia T\u00e9rmica Classifica\u00e7\u00e3o da perda de cabe\u00e7a A perda\u00a0de\u00a0carga\u00a0de um sistema de tubula\u00e7\u00e3o \u00e9 igual \u00e0 produzida em uma tubula\u00e7\u00e3o reta, cujo comprimento \u00e9 igual aos tubos dos sistemas &#8230; <a title=\"O que \u00e9 classifica\u00e7\u00e3o de perda de cabe\u00e7a &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-classificacao-de-perda-de-cabeca-definicao\/\" aria-label=\"More on O que \u00e9 classifica\u00e7\u00e3o de perda de cabe\u00e7a &#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 classifica\u00e7\u00e3o de perda de cabe\u00e7a - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Classifica\u00e7\u00e3o da perda de carga. 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