{"id":47943,"date":"2019-11-07T10:39:59","date_gmt":"2019-11-07T09:39:59","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-eficiencia-termica-para-ciclo-duplo-definicao\/"},"modified":"2020-01-26T11:37:11","modified_gmt":"2020-01-26T10:37:11","slug":"o-que-e-eficiencia-termica-para-ciclo-duplo-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-eficiencia-termica-para-ciclo-duplo-definicao\/","title":{"rendered":"O que \u00e9 efici\u00eancia t\u00e9rmica para ciclo duplo &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Efici\u00eancia t\u00e9rmica para ciclo duplo.\u00a0A efici\u00eancia t\u00e9rmica do ciclo duplo, ou seja, a fra\u00e7\u00e3o de calor, QH, que \u00e9 convertida em trabalho, fica entre o ciclo Otto e o diesel.\u00a0Engenharia T\u00e9rmica<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/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<div class=\"su-spacer\"><\/div>\n<h2>Ciclo Diesel &#8211; Motor Diesel<\/h2>\n<p><strong>O ciclo duplo<\/strong>\u00a0, ou\u00a0<strong>ciclo de press\u00e3o limitado<\/strong>\u00a0, \u00e9 um\u00a0<strong>ciclo termodin\u00e2mico<\/strong>\u00a0que combina o\u00a0<a title=\"Ciclo Otto - Otto Engine\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-o-ciclo-otto-otto-engine-definicao\/\"><strong>ciclo Otto<\/strong><\/a>\u00a0e o\u00a0<a title=\"Ciclo Diesel - Motor Diesel\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-o-ciclo-diesel-motor-diesel-definicao\/\"><strong>ciclo Diesel<\/strong><\/a>\u00a0.\u00a0No ciclo duplo, a combust\u00e3o ocorre em parte a volume constante e em parte a press\u00e3o constante.\u00a0Pode ser usado para descrever motores de combust\u00e3o interna.\u00a0Os diagramas press\u00e3o-volume dos motores de combust\u00e3o interna reais n\u00e3o s\u00e3o bem descritos pelos ciclos Otto e Diesel.\u00a0Um ciclo padr\u00e3o do ar que pode ser feito para aproximar mais as varia\u00e7\u00f5es de press\u00e3o \u00e9 o ciclo duplo padr\u00e3o do ar.\u00a0Uma abordagem mais capaz seria modelar o processo de combust\u00e3o nos motores Otto e Diesel como uma combina\u00e7\u00e3o de dois processos de transfer\u00eancia de calor, um\u00a0<a title=\"Processo Isoc\u00f3rico - Processo Isom\u00e9trico\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-o-processo-isocorico-processo-isometrico-definicao\/\"><strong>processo isoc\u00f3rico<\/strong><\/a>\u00a0e outro<a title=\"Processo isob\u00e1rico\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-o-processo-isobarico-definicao\/\"><strong>processo isob\u00e1rico<\/strong><\/a>\u00a0.<\/p>\n<p>Em compara\u00e7\u00e3o com um ciclo Otto, que assume uma adi\u00e7\u00e3o instant\u00e2nea de calor (adi\u00e7\u00e3o isoc\u00f3rica de calor), em um\u00a0<strong>ciclo duplo, o<\/strong>\u00a0calor \u00e9 adicionado parcialmente a volume constante e parcialmente a press\u00e3o constante.\u00a0Portanto, a vantagem \u00e9 que h\u00e1 mais tempo dispon\u00edvel para o combust\u00edvel queimar completamente.\u00a0Por outro lado, o uso de um ciclo duplo \u00e9\u00a0<strong>um pouco mais complexo<\/strong>\u00a0.\u00a0A efici\u00eancia t\u00e9rmica situa-se entre os ciclos Otto e Diesel.<\/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\">\n<p><strong>O ciclo duplo combina o ciclo Otto e o ciclo Diesel.\u00a0<\/strong>.\u00a0Nesta foto, existe um mecanismo Otto, que \u00e9 acionado por uma vela de igni\u00e7\u00e3o em vez da pr\u00f3pria compress\u00e3o.<\/p>\n<figure id=\"attachment_17548\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-17548\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Four-Stroke-Engine-Otto-Engine.gif\"><img loading=\"lazy\" class=\"size-full wp-image-17548 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Four-Stroke-Engine-Otto-Engine.gif\" alt=\"Motor a quatro tempos - motor Otto\" width=\"225\" height=\"300\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Four-Stroke-Engine-Otto-Engine.gif\" \/><\/a><figcaption id=\"caption-attachment-17548\" class=\"wp-caption-text\">Motor a quatro tempos &#8211; motor Otto<br \/>\nFonte: wikipedia.org, trabalho pr\u00f3prio da Zephyris, CC BY-SA 3.0<\/figcaption><\/figure>\n<div class=\"su-youtube su-responsive-media-yes\"><iframe class=\"lazy-loaded\" src=\"https:\/\/www.youtube.com\/embed\/xflY5uS-nnw?\" width=\"340\" height=\"200\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-lazy-type=\"iframe\" data-src=\"https:\/\/www.youtube.com\/embed\/xflY5uS-nnw?\" data-mce-fragment=\"1\"><\/iframe><\/div>\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<div class=\"su-spacer\"><\/div>\n<h2>Efici\u00eancia t\u00e9rmica para ciclo duplo<\/h2>\n<p>Em geral, a\u00a0<a title=\"Thermal Efficiency\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-eficiencia-termica-definicao\/\"><strong>efici\u00eancia t\u00e9rmica<\/strong><\/a><a title=\"Thermal Efficiency\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-eficiencia-termica-definicao\/\">\u00a0,\u00a0<\/a><a title=\"Thermal Efficiency\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-eficiencia-termica-definicao\/\"><strong><em>\u03b7\u00a0<\/em><\/strong><\/a><a title=\"Thermal Efficiency\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-eficiencia-termica-definicao\/\"><strong><em><sub>th<\/sub><\/em><\/strong><\/a>\u00a0, de qualquer motor de calor \u00e9 definida como a raz\u00e3o entre o\u00a0<a href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-trabalho-em-termodinamica-definicao\/\">trabalho<\/a>\u00a0que faz,\u00a0<strong>W<\/strong>\u00a0, para o\u00a0<a href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-calor-na-fisica-calor-definicao\/\">calor<\/a>\u00a0de entrada a uma temperatura elevada, Q\u00a0<sub>H<\/sub>\u00a0.<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/thermal-efficiency-formula-1.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-16945 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/thermal-efficiency-formula-1.png\" alt=\"f\u00f3rmula de efici\u00eancia t\u00e9rmica - 1\" width=\"125\" height=\"82\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/thermal-efficiency-formula-1.png\" \/><\/a><\/p>\n<p><span>A\u00a0<\/span><strong><span>efici\u00eancia t\u00e9rmica<\/span><\/strong><span>\u00a0,\u00a0<\/span><strong><em><span>\u03b7\u00a0<\/span><\/em><\/strong><strong><em><sub><span>th<\/span><\/sub><\/em><\/strong><span>\u00a0, representa a fra\u00e7\u00e3o de\u00a0<\/span><strong><span>calor<\/span><\/strong><span>\u00a0,\u00a0<\/span><strong><span>Q\u00a0<\/span><\/strong><strong><sub><span>H<\/span><\/sub><\/strong><span>\u00a0, que \u00e9 convertida\u00a0<\/span><strong><span>em trabalho<\/span><\/strong><span>\u00a0.\u00a0Como a energia \u00e9 conservada de acordo com a\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-primeira-lei-da-termodinamica-definicao\/\"><strong><span>primeira lei da termodin\u00e2mica<\/span><\/strong><\/a><span>\u00a0e a energia n\u00e3o pode ser convertida para funcionar completamente, a entrada de calor, Q\u00a0<\/span><sub><span>H<\/span><\/sub><span>\u00a0, deve ser igual ao trabalho realizado, W, mais o calor que deve ser dissipado como\u00a0<\/span><strong><span>calor residual Q\u00a0<\/span><\/strong><strong><sub><span>C<\/span><\/sub><\/strong><span>\u00a0no meio Ambiente.\u00a0Portanto, podemos reescrever a f\u00f3rmula da efici\u00eancia t\u00e9rmica como:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/thermal-efficiency-formula-2.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-16944 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/thermal-efficiency-formula-2.png\" alt=\"f\u00f3rmula de efici\u00eancia t\u00e9rmica - 2\" width=\"352\" height=\"83\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/thermal-efficiency-formula-2.png\" \/><\/a><\/p>\n<p><span>Portanto, o calor adicionado e rejeitado \u00e9 dado por:<\/span><\/p>\n<p><span>Q\u00a0<\/span><sub><span>add-1<\/span><\/sub><span>\u00a0= mc\u00a0<\/span><sub><span>v<\/span><\/sub><span>\u00a0(T\u00a0<\/span><sub><span>3<\/span><\/sub><span>\u00a0&#8211; T\u00a0<\/span><sub><span>2<\/span><\/sub><span>\u00a0)<\/span><\/p>\n<p><span>Q\u00a0<\/span><sub><span>add-2<\/span><\/sub><span>\u00a0= mc\u00a0<\/span><sub><span>p<\/span><\/sub><span>\u00a0(T\u00a0<\/span><sub><span>4<\/span><\/sub><span>\u00a0&#8211; T\u00a0<\/span><sub><span>3<\/span><\/sub><span>\u00a0)<\/span><\/p>\n<p><span>Q\u00a0<\/span><sub><span>a<\/span><\/sub><span>\u00a0= mc\u00a0<\/span><sub><span>v<\/span><\/sub><span>\u00a0(t\u00a0<\/span><sub><span>5<\/span><\/sub><span>\u00a0&#8211; T\u00a0<\/span><sub><span>1<\/span><\/sub><span>\u00a0)<\/span><\/p>\n<p><span>Portanto, a efici\u00eancia t\u00e9rmica para um ciclo duplo \u00e9:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Dual-cycle-thermal-efficiency.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-17669 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Dual-cycle-thermal-efficiency.png\" alt=\"Ciclo duplo - efici\u00eancia t\u00e9rmica\" width=\"350\" height=\"75\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Dual-cycle-thermal-efficiency.png\" \/><\/a><\/p>\n<\/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","protected":false},"excerpt":{"rendered":"<p>Efici\u00eancia t\u00e9rmica para ciclo duplo.\u00a0A efici\u00eancia t\u00e9rmica do ciclo duplo, ou seja, a fra\u00e7\u00e3o de calor, QH, que \u00e9 convertida em trabalho, fica entre o ciclo Otto e o diesel.\u00a0Engenharia T\u00e9rmica Ciclo Diesel &#8211; Motor Diesel O ciclo duplo\u00a0, ou\u00a0ciclo de press\u00e3o limitado\u00a0, \u00e9 um\u00a0ciclo termodin\u00e2mico\u00a0que combina o\u00a0ciclo Otto\u00a0e o\u00a0ciclo Diesel\u00a0.\u00a0No ciclo duplo, a combust\u00e3o &#8230; <a title=\"O que \u00e9 efici\u00eancia t\u00e9rmica para ciclo duplo &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-eficiencia-termica-para-ciclo-duplo-definicao\/\" aria-label=\"More on O que \u00e9 efici\u00eancia t\u00e9rmica para ciclo duplo &#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 efici\u00eancia t\u00e9rmica para ciclo duplo - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Efici\u00eancia t\u00e9rmica para ciclo duplo. 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