{"id":51313,"date":"2020-01-26T11:34:35","date_gmt":"2020-01-26T10:34:35","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-ciclo-duplo-ciclo-de-pressao-limitado-definicao\/"},"modified":"2020-01-26T11:35:55","modified_gmt":"2020-01-26T10:35:55","slug":"o-que-e-ciclo-duplo-ciclo-de-pressao-limitado-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-ciclo-duplo-ciclo-de-pressao-limitado-definicao\/","title":{"rendered":"O que \u00e9 Ciclo Duplo &#8211; Ciclo de Press\u00e3o Limitado &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">O ciclo duplo, ou ciclo de press\u00e3o limitado, \u00e9 um ciclo termodin\u00e2mico que combina o ciclo Otto e o ciclo Diesel.\u00a0Um ciclo duplo consiste em cinco processos termodin\u00e2micos.\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>Ciclo Duplo &#8211; Processos<\/h2>\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<p><span>Em um\u00a0<\/span><strong><span>ciclo duplo<\/span><\/strong><span>\u00a0, o sistema que executa o ciclo passa por uma s\u00e9rie de cinco processos: dois processos isentr\u00f3picos (adiab\u00e1ticos revers\u00edveis) alternados com dois processos isoc\u00f3ricos e um processo isob\u00e1rico:<\/span><\/p>\n<ul>\n<li>\n<figure id=\"attachment_17668\" class=\"wp-caption alignright\" aria-describedby=\"caption-attachment-17668\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Dual-Cycle-Mixed-Cycle-pV-Diagram.png\"><img loading=\"lazy\" class=\"size-medium wp-image-17668 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Dual-Cycle-Mixed-Cycle-pV-Diagram-300x277.png\" alt=\"Diagrama de ciclo duplo - pV\" width=\"300\" height=\"277\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Dual-Cycle-Mixed-Cycle-pV-Diagram-300x277.png\" \/><\/a><figcaption id=\"caption-attachment-17668\" class=\"wp-caption-text\"><span>Diagrama de ciclo duplo &#8211; pV<\/span><\/figcaption><\/figure>\n<p><strong><span>Compress\u00e3o isentr\u00f3pica<\/span><\/strong><span>\u00a0(curso de compress\u00e3o) &#8211; O g\u00e1s \u00e9 comprimido adiabaticamente do estado 1 para o estado 2, \u00e0 medida que o pist\u00e3o se move do ponto de fechamento da v\u00e1lvula de admiss\u00e3o (1) para o ponto morto superior.\u00a0O ambiente trabalha com o g\u00e1s, aumentando sua energia interna (temperatura) e comprimindo-o.\u00a0Por outro lado, a entropia permanece inalterada.\u00a0As mudan\u00e7as nos volumes e sua propor\u00e7\u00e3o (\u00a0<\/span><em><span>V\u00a0<\/span><\/em><em><sub><span>1<\/span><\/sub><\/em><em><span>\u00a0\/ V\u00a0<\/span><\/em><em><sub><span>2<\/span><\/sub><\/em><span>\u00a0) s\u00e3o conhecidas como taxa de compress\u00e3o.\u00a0A taxa de compacta\u00e7\u00e3o \u00e9 menor que a taxa de expans\u00e3o.<\/span><\/li>\n<li><strong><span>Compress\u00e3o isoc\u00f3rica<\/span><\/strong><span>\u00a0(fase de igni\u00e7\u00e3o) &#8211; Nesta fase (entre o estado 2 e o estado 3), h\u00e1 um volume constante (o pist\u00e3o est\u00e1 em repouso) transferido para o ar a partir de uma fonte externa, enquanto o pist\u00e3o est\u00e1 em repouso no ponto morto superior .\u00a0Este processo \u00e9 semelhante ao processo isoc\u00f3rico no ciclo Otto.\u00a0Pretende-se representar a igni\u00e7\u00e3o da mistura combust\u00edvel-ar injetada na c\u00e2mara e a subsequente queima r\u00e1pida.\u00a0A press\u00e3o aumenta e a raz\u00e3o (\u00a0<\/span><em><span>P\u00a0<\/span><\/em><em><sub><span>3<\/span><\/sub><\/em><em><span>\u00a0\/ P\u00a0<\/span><\/em><em><sub><span>2<\/span><\/sub><\/em><span>\u00a0) \u00e9 conhecida como \u201ctaxa de explos\u00e3o\u201d.<\/span><\/li>\n<li><strong><span>Expans\u00e3o isob\u00e1rica<\/span><\/strong><span>\u00a0(golpe de for\u00e7a) &#8211; Nesta fase (entre o estado 3 e o estado 4), h\u00e1 uma transfer\u00eancia de calor de press\u00e3o constante (modelo idealizado) para o ar a partir de uma fonte externa (combust\u00e3o do combust\u00edvel) enquanto o pist\u00e3o est\u00e1 se movendo em dire\u00e7\u00e3o ao V\u00a0<\/span><sub><span>4<\/span><\/sub><span>\u00a0.\u00a0Durante o processo de press\u00e3o constante, a energia entra no sistema \u00e0 medida que o calor Q \u00e9\u00a0<\/span><sub><span>adicionado<\/span><\/sub><span>\u00a0e uma parte do trabalho \u00e9 feita movendo o pist\u00e3o.<\/span><\/li>\n<li><strong><span>Expans\u00e3o isentr\u00f3pica<\/span><\/strong><span>\u00a0(poder acidente vascular cerebral) &#8211; O g\u00e1s expande-se adiabaticamente de estado 4 para o estado 5, quando o pist\u00e3o se move da V\u00a0<\/span><sub><span>3<\/span><\/sub><span>\u00a0a centro morto inferior.\u00a0O g\u00e1s trabalha nos arredores (pist\u00e3o) e perde uma quantidade de energia interna igual ao trabalho que sai do sistema.\u00a0Novamente a entropia permanece inalterada.<\/span><\/li>\n<li><strong><span>Descompress\u00e3o isoc\u00f3rica (curso de exaust\u00e3o)<\/span><\/strong><span>\u00a0&#8211; Nesta fase, o ciclo \u00e9 conclu\u00eddo por um processo de volume constante no qual o calor \u00e9 rejeitado do ar enquanto o pist\u00e3o est\u00e1 no ponto morto inferior.\u00a0A press\u00e3o do g\u00e1s de trabalho cai instantaneamente do ponto 5 ao ponto 1. A v\u00e1lvula de escape se abre no ponto 5. O curso de escape ocorre imediatamente ap\u00f3s esta descompress\u00e3o.\u00a0\u00c0 medida que o pist\u00e3o se move do ponto morto inferior (ponto 1) para o ponto morto superior (ponto 0) com a v\u00e1lvula de escape aberta, a mistura gasosa \u00e9 ventilada para a atmosfera e o processo recome\u00e7a.<\/span><\/li>\n<\/ul>\n<p><span>Durante o ciclo duplo, o trabalho \u00e9 realizado sobre o g\u00e1s pelo pist\u00e3o entre os estados 1 e 2 (\u00a0<\/span><strong><span>i\u00a0<\/span><\/strong><strong><span>compress\u00e3o sentropic<\/span><\/strong><span>\u00a0).\u00a0O trabalho \u00e9 realizado pelo g\u00e1s no pist\u00e3o entre os est\u00e1gios 2 e 3 (\u00a0<\/span><strong><span>i\u00a0<\/span><\/strong><strong><span>adi\u00e7\u00e3o de calor sob\u00e1rico<\/span><\/strong><span>\u00a0) e entre os est\u00e1gios 2 e 3 (\u00a0<\/span><strong><span>i\u00a0<\/span><\/strong><strong><span>expans\u00e3o sentr\u00f3pica<\/span><\/strong><span>\u00a0).\u00a0A diferen\u00e7a entre o trabalho realizado pelo g\u00e1s e o trabalho realizado com o g\u00e1s \u00e9 o trabalho l\u00edquido produzido pelo ciclo e corresponde \u00e0 \u00e1rea delimitada pela curva do ciclo.\u00a0O trabalho produzido pelos tempos de ciclo, a taxa do ciclo (ciclos por segundo) \u00e9 igual \u00e0 pot\u00eancia produzida pelo motor Diesel.<\/span><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights  lgc-first\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Processo isentr\u00f3pico<\/span><\/h2>\n<p><span>Um\u00a0<\/span><a title=\"Processo isentr\u00f3pico\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-processo-isentropico-definicao\/\"><strong><span>processo isentr\u00f3pico<\/span><\/strong><\/a><span>\u00a0\u00e9 um\u00a0<\/span><a title=\"Processos termodin\u00e2micos\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-processo-termodinamico-definicao\/\"><strong><span>processo termodin\u00e2mico<\/span><\/strong><\/a><span>\u00a0, no qual a\u00a0<\/span><a title=\"O que \u00e9 entropia\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/what-is-entropy\/\"><strong><span>entropia<\/span><\/strong>\u00a0<\/a><span>do fluido ou g\u00e1s permanece constante.\u00a0Isso significa que o\u00a0<\/span><strong><span>processo isentr\u00f3pico<\/span><\/strong><span>\u00a0\u00e9 um caso especial de um\u00a0<\/span><strong><span>processo adiab\u00e1tico<\/span><\/strong><span>\u00a0no qual n\u00e3o h\u00e1 transfer\u00eancia de calor ou mat\u00e9ria.\u00a0\u00c9 um\u00a0<\/span><strong><span>processo adiab\u00e1tico revers\u00edvel<\/span><\/strong><span>\u00a0.\u00a0A suposi\u00e7\u00e3o de que n\u00e3o h\u00e1 transfer\u00eancia de calor \u00e9 muito importante, pois podemos usar a aproxima\u00e7\u00e3o adiab\u00e1tica apenas em\u00a0<\/span><strong><span>processos muito r\u00e1pidos<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<p><strong><span>Processo isentr\u00f3pico e a primeira lei<\/span><\/strong><\/p>\n<p><span>Para um sistema fechado, podemos escrever a\u00a0<\/span><strong><a title=\"Primeira lei em termos de entalpia dH = dQ + Vdp\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/laws-of-thermodynamics\/first-law-of-thermodynamics\/first-law-in-terms-of-enthalpy-dh-dq-vdp\/\"><span>primeira lei da termodin\u00e2mica em termos de entalpia<\/span><\/a><\/strong><span>\u00a0:<\/span><\/p>\n<p><strong><span>dH = dQ + Vdp<\/span><\/strong><\/p>\n<p><strong><span>ou<\/span><\/strong><\/p>\n<p><strong><span>dH = TdS + Vdp<\/span><\/strong><\/p>\n<p><strong><span>Processo isentr\u00f3pico (dQ = 0):<\/span><\/strong><\/p>\n<p><strong><span>dH = Vdp \u2192 W = H\u00a0<\/span><\/strong><strong><sub><span>2<\/span><\/sub><\/strong><strong><span>\u00a0&#8211; H\u00a0<\/span><\/strong><strong><sub><span>1<\/span><\/sub><\/strong><strong><span>\u00a0\u00a0\u00a0\u00a0\u00a0\u2192 H\u00a0<\/span><\/strong><strong><sub><span>2<\/span><\/sub><\/strong><strong><span>\u00a0&#8211; H\u00a0<\/span><\/strong><strong><sub><span>1<\/span><\/sub><\/strong><strong><span>\u00a0=\u00a0<\/span><em><span>C\u00a0<\/span><\/em><\/strong><strong><em><sub><span>P<\/span><\/sub><\/em><\/strong><strong><em><span>\u00a0(T\u00a0<\/span><\/em><\/strong><strong><em><sub><span>2<\/span><\/sub><\/em><\/strong><strong><em><span>\u00a0&#8211; T\u00a0<\/span><\/em><\/strong><strong><em><sub><span>1<\/span><\/sub><\/em><\/strong><strong><em><span>\u00a0) \u00a0\u00a0\u00a0<\/span><\/em><\/strong><em><span>\u00a0(para\u00a0<\/span><a title=\"O que \u00e9 o g\u00e1s ideal\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/ideal-gas-law\/what-is-ideal-gas\/\"><span>g\u00e1s ideal<\/span><\/a><span>\u00a0)<\/span><\/em><\/p>\n<p><strong><span>Processo isentr\u00f3pico do g\u00e1s ideal<\/span><\/strong><\/p>\n<p><span>O\u00a0<\/span><strong><span>processo isentr\u00f3pico<\/span><\/strong><span>\u00a0(um caso especial de processo adiab\u00e1tico) pode ser expresso com a\u00a0<\/span><a title=\"Lei do g\u00e1s ideal\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/ideal-gas-law\/\"><strong><span>lei dos gases ideais<\/span><\/strong><\/a><span>\u00a0como:<\/span><\/p>\n<p><strong><em><span>pV\u00a0<\/span><sup><span>\u03ba<\/span><\/sup><span>\u00a0= constante<\/span><\/em><\/strong><\/p>\n<p><span>ou<\/span><\/p>\n<p><em><strong><span>p\u00a0<\/span><sub><span>1<\/span><\/sub><span>\u00a0V\u00a0<\/span><sub><span>1\u00a0<\/span><\/sub><sup><span>k<\/span><\/sup><span>\u00a0= p\u00a0<\/span><sub><span>2<\/span><\/sub><span>\u00a0V\u00a0<\/span><sub><span>2\u00a0<\/span><\/sub><sup><span>k<\/span><\/sup><\/strong><\/em><\/p>\n<p><span>em que\u00a0<\/span><strong><span>\u03ba = c\u00a0<\/span><sub><span>p<\/span><\/sub><span>\u00a0\/ c\u00a0<\/span><sub><span>v<\/span><\/sub><\/strong><span>\u00a0\u00e9 a propor\u00e7\u00e3o de\u00a0<a title=\"Capacidade t\u00e9rmica - Capacidade t\u00e9rmica espec\u00edfica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/laws-of-thermodynamics\/first-law-of-thermodynamics\/heat-capacity\/\"><strong>aquecimentos espec\u00edficos<\/strong><\/a>\u00a0(ou\u00a0<strong>capacidades de calor<\/strong>\u00a0) para o g\u00e1s.\u00a0Um para\u00a0<strong>press\u00e3o constante (c\u00a0<\/strong><strong><sub>p<\/sub><\/strong><strong>\u00a0)<\/strong>\u00a0e outro para\u00a0<strong>volume constante (c\u00a0<\/strong><strong><sub>v<\/sub><\/strong><strong>\u00a0)<\/strong>\u00a0.\u00a0Observe que essa raz\u00e3o\u00a0<strong>\u03ba\u00a0\u00a0<\/strong><strong>= c\u00a0<\/strong><strong><sub>p<\/sub><\/strong><strong>\u00a0\/ c\u00a0<\/strong><strong><sub>v<\/sub><\/strong>\u00a0\u00e9 um fator na determina\u00e7\u00e3o da velocidade do som em um g\u00e1s e em outros processos adiab\u00e1ticos.<\/span><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Processo Isoc\u00f3rico<\/span><\/h2>\n<p><span>Um\u00a0<\/span><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><span>processo isoc\u00f3rico<\/span><\/strong><\/a><span>\u00a0\u00e9 um processo termodin\u00e2mico, no qual o\u00a0<\/span><strong><span>volume<\/span><\/strong><span>\u00a0do sistema fechado\u00a0<\/span><strong><span>permanece constante<\/span><\/strong><span>\u00a0(V = const).\u00a0Ele descreve o comportamento do g\u00e1s dentro do recipiente, que n\u00e3o pode ser deformado.\u00a0Como o volume permanece constante, a transfer\u00eancia de calor para dentro ou para fora do sistema n\u00e3o\u00a0<\/span><a title=\"Trabalho p\u0394V - Trabalho de Fronteira e Trabalho V\u0394p\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/laws-of-thermodynamics\/first-law-of-thermodynamics\/p%ce%b4v-work-boundary-work-and-v%ce%b4p-work\/\"><span>funciona<\/span><\/a><span>\u00a0, mas altera apenas a\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-energia-interna-energia-termica-definicao\/\"><strong><span>energia interna<\/span><\/strong><\/a><span>\u00a0(a temperatura) do sistema.<\/span><\/p>\n<p><strong><span>Processo isoc\u00f3rico e a primeira lei<\/span><\/strong><\/p>\n<p><span>A forma cl\u00e1ssica da\u00a0<\/span><a title=\"Primeira Lei da Termodin\u00e2mica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-primeira-lei-da-termodinamica-definicao\/\"><span>primeira lei da termodin\u00e2mica<\/span><\/a><span>\u00a0\u00e9 a seguinte equa\u00e7\u00e3o:<\/span><\/p>\n<p><strong><span>dU = dQ &#8211; dW<\/span><\/strong><\/p>\n<p><span>Nesta equa\u00e7\u00e3o, dW \u00e9 igual a\u00a0<\/span><strong><span>dW = pdV<\/span><\/strong><span>\u00a0e \u00e9 conhecido como\u00a0<\/span><a title=\"Trabalho p\u0394V - Trabalho de Fronteira e Trabalho V\u0394p\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/laws-of-thermodynamics\/first-law-of-thermodynamics\/p%ce%b4v-work-boundary-work-and-v%ce%b4p-work\/\"><span>trabalho de fronteira<\/span><\/a><span>\u00a0.\u00a0Ent\u00e3o:<\/span><\/p>\n<p><strong><span>dU = dQ &#8211; pdV<\/span><\/strong><\/p>\n<p><span>No\u00a0<\/span><strong><span>processo isoc\u00f3rico<\/span><\/strong><span>\u00a0e no\u00a0<\/span><strong><span>g\u00e1s ideal<\/span><\/strong><span>\u00a0, todo o calor adicionado ao sistema ser\u00e1 usado para aumentar a energia interna.<\/span><\/p>\n<p><strong><span>Processo isoc\u00f3rico (pdV = 0):<\/span><\/strong><\/p>\n<p><strong><span>dU = dQ \u00a0\u00a0\u00a0\u00a0<\/span><\/strong><em><span>(para g\u00e1s ideal)<\/span><\/em><\/p>\n<p><strong><span>dU = 0 = Q &#8211; W \u2192 W = Q \u00a0\u00a0<\/span><em>\u00a0\u00a0\u00a0\u00a0<\/em><\/strong><em><span>(para g\u00e1s ideal)<\/span><\/em><\/p>\n<p><strong><span>Processo isoc\u00f3rico do g\u00e1s ideal<\/span><\/strong><\/p>\n<p><span>O\u00a0<\/span><strong><span>processo isoc\u00f3rico<\/span><\/strong><span>\u00a0pode ser expresso com a\u00a0<\/span><a title=\"Lei do g\u00e1s ideal\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/ideal-gas-law\/\"><strong><span>lei dos gases ideais<\/span><\/strong><\/a><span>\u00a0como:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isochoric-process-equation-1.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-17465 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isochoric-process-equation-1.png\" alt=\"processo isoc\u00f3rico - equa\u00e7\u00e3o 1\" width=\"138\" height=\"52\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isochoric-process-equation-1.png\" \/><\/a><\/p>\n<p><span>ou<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isochoric-process-equation-2.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-17466 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isochoric-process-equation-2.png\" alt=\"processo isoc\u00f3rico - equa\u00e7\u00e3o 2\" width=\"86\" height=\"66\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isochoric-process-equation-2.png\" \/><\/a><\/p>\n<p><span>Em um\u00a0<\/span><strong><span>diagrama pV<\/span><\/strong><span>\u00a0, o processo ocorre ao longo de uma linha horizontal que possui a equa\u00e7\u00e3o V = constante.<\/span><\/p>\n<p><span>Veja tamb\u00e9m:\u00a0\u00a0<\/span><a title=\"Lei de Guy-Lussac\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-lei-de-gay-lussac-definicao\/\"><span>Lei de Guy-Lussac<\/span><\/a><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights  lgc-last\">\n<div class=\"inside-grid-column\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Processo isob\u00e1rico<\/span><\/h2>\n<p><span>Um\u00a0<\/span><strong><span>processo isob\u00e1rico<\/span><\/strong><span>\u00a0\u00e9 um\u00a0<\/span><a title=\"Processos termodin\u00e2micos\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-processo-termodinamico-definicao\/\"><span>processo termodin\u00e2mico<\/span><\/a><span>\u00a0, no qual a\u00a0<\/span><a title=\"O que \u00e9 press\u00e3o - F\u00edsica\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-pressure-physics\/\"><strong><span>press\u00e3o<\/span><\/strong><\/a><span>\u00a0do sistema\u00a0<\/span><strong><span>permanece constante<\/span><\/strong><span>\u00a0(p = const).\u00a0A transfer\u00eancia de calor para dentro ou para fora do sistema funciona, mas tamb\u00e9m altera a energia interna do sistema.<\/span><\/p>\n<p><span>Como existem mudan\u00e7as na\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-energia-interna-energia-termica-definicao\/\"><span>energia interna<\/span><\/a><span>\u00a0(dU) e no volume do sistema (\u2206V), os engenheiros costumam usar a\u00a0<\/span><a title=\"O que \u00e9 entalpia\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/what-is-enthalpy\/\"><strong><span>entalpia<\/span><\/strong><\/a><span>\u00a0do sistema, que \u00e9 definida como:<\/span><\/p>\n<p><em><strong><span>H = U + pV<\/span><\/strong><\/em><\/p>\n<p><strong><span>Processo isob\u00e1rico e a primeira lei<\/span><\/strong><\/p>\n<p><span>A forma cl\u00e1ssica da\u00a0<\/span><a title=\"Primeira Lei da Termodin\u00e2mica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-primeira-lei-da-termodinamica-definicao\/\"><span>primeira lei da termodin\u00e2mica<\/span><\/a><span>\u00a0\u00e9 a seguinte equa\u00e7\u00e3o:<\/span><\/p>\n<p><strong><span>dU = dQ &#8211; dW<\/span><\/strong><\/p>\n<p><span>Nesta equa\u00e7\u00e3o, dW \u00e9 igual a\u00a0<\/span><strong><span>dW = pdV<\/span><\/strong><span>\u00a0e \u00e9 conhecido como\u00a0<\/span><a title=\"Trabalho p\u0394V - Trabalho de Fronteira e Trabalho V\u0394p\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/laws-of-thermodynamics\/first-law-of-thermodynamics\/p%ce%b4v-work-boundary-work-and-v%ce%b4p-work\/\"><span>trabalho de fronteira<\/span><\/a><span>\u00a0.\u00a0Em um processo isob\u00e1rico e no g\u00e1s ideal,\u00a0<\/span><strong><span>parte do calor adicionado<\/span><\/strong><span>\u00a0ao sistema ser\u00e1 usada para\u00a0<\/span><strong><span>realizar o trabalho<\/span><\/strong><span>\u00a0e\u00a0<\/span><strong><span>parte do calor<\/span><\/strong><span>\u00a0adicionado aumentar\u00e1 a\u00a0<\/span><a href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-energia-interna-energia-termica-definicao\/\"><strong><span>energia interna<\/span><\/strong><\/a><span>\u00a0(aumentar\u00e1 a temperatura).\u00a0Portanto, \u00e9 conveniente usar a\u00a0<\/span><strong><span>entalpia em<\/span><\/strong><span>\u00a0vez da energia interna.<\/span><\/p>\n<p><strong><span>Processo isob\u00e1rico (Vdp = 0):<\/span><\/strong><\/p>\n<p><strong><span>dH = dQ \u2192 Q = H\u00a0<\/span><\/strong><strong><sub><span>2<\/span><\/sub><\/strong><strong><span>\u00a0&#8211; H\u00a0<\/span><\/strong><strong><sub><span>1<\/span><\/sub><\/strong><\/p>\n<p><strong><span>Na entropia constante<\/span><\/strong><span>\u00a0, ou seja, no processo isentr\u00f3pico, a\u00a0<\/span><strong><span>mudan\u00e7a de entalpia<\/span><\/strong><span>\u00a0\u00e9 igual ao\u00a0<\/span><strong><span>trabalho do processo de fluxo<\/span><\/strong><span>\u00a0realizado no sistema ou pelo mesmo.<\/span><\/p>\n<p><strong><span>Processo isob\u00e1rico do g\u00e1s ideal<\/span><\/strong><\/p>\n<p><span>O\u00a0<\/span><strong><span>processo isob\u00e1rico<\/span><\/strong><span>\u00a0pode ser expresso com a\u00a0<\/span><a title=\"Lei do g\u00e1s ideal\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/ideal-gas-law\/\"><strong><span>lei do g\u00e1s ideal<\/span><\/strong><\/a><span>\u00a0como:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isobaric-process-equation-2.png?a34b7f\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-17430 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isobaric-process-equation-2.png?a34b7f\" alt=\"processo isob\u00e1rico - equa\u00e7\u00e3o - 2\" width=\"134\" height=\"63\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isobaric-process-equation-2.png?a34b7f\" \/><\/a><\/p>\n<p><span>ou<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isobaric-process-equation-3.png?a34b7f\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-17431 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isobaric-process-equation-3.png?a34b7f\" alt=\"processo isob\u00e1rico - equa\u00e7\u00e3o - 3\" width=\"77\" height=\"67\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/isobaric-process-equation-3.png?a34b7f\" \/><\/a><\/p>\n<p><span>Em um\u00a0<\/span><strong><span>diagrama de pV<\/span><\/strong><span>\u00a0, o processo ocorre ao longo de uma linha horizontal (chamada isobar) que possui a equa\u00e7\u00e3o p = constante.<\/span><\/p>\n<p><span>Veja tamb\u00e9m:\u00a0<\/span><a title=\"Lei de Charles\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-a-lei-de-charles-definicao\/\"><span>Lei de Charles<\/span><\/a><\/p>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights  lgc-first\">\n<div class=\"inside-grid-column\">\n<figure id=\"attachment_17280\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-17280\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Isentropic-Process-characteristics.png\"><img loading=\"lazy\" class=\"size-full wp-image-17280 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Isentropic-Process-characteristics.png\" alt=\"Processo isentr\u00f3pico - caracter\u00edsticas\" width=\"386\" height=\"609\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Isentropic-Process-characteristics.png\" \/><\/a><figcaption id=\"caption-attachment-17280\" class=\"wp-caption-text\"><span>Processo isentr\u00f3pico &#8211; principais caracter\u00edsticas<\/span><\/figcaption><\/figure>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \">\n<div class=\"inside-grid-column\">\n<figure id=\"attachment_17463\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-17463\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Isochoric-process-main-characteristics.png\"><img loading=\"lazy\" class=\"size-full wp-image-17463 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Isochoric-process-main-characteristics.png\" alt=\"Processo isoc\u00f3rico - principais caracter\u00edsticas\" width=\"382\" height=\"468\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Isochoric-process-main-characteristics.png\" \/><\/a><figcaption id=\"caption-attachment-17463\" class=\"wp-caption-text\"><span>Processo isoc\u00f3rico &#8211; principais caracter\u00edsticas<\/span><\/figcaption><\/figure>\n<\/div>\n<\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights  lgc-last\">\n<div class=\"inside-grid-column\">\n<figure id=\"attachment_17426\" class=\"wp-caption aligncenter\" aria-describedby=\"caption-attachment-17426\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Isobaric-process-main-characteristics.png\"><img loading=\"lazy\" class=\"size-full wp-image-17426 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Isobaric-process-main-characteristics.png\" alt=\"Processo isob\u00e1rico - principais caracter\u00edsticas\" width=\"381\" height=\"717\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Isobaric-process-main-characteristics.png\" \/><\/a><figcaption id=\"caption-attachment-17426\" class=\"wp-caption-text\"><span>Processo isob\u00e1rico &#8211; principais caracter\u00edsticas<\/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\">\n<div class=\"su-spacer\"><\/div>\n<h2><span>Efici\u00eancia t\u00e9rmica para ciclo duplo<\/span><\/h2>\n<p><span>Em geral, a\u00a0<a title=\"Efici\u00eancia t\u00e9rmica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-eficiencia-termica-definicao\/\"><strong>efici\u00eancia t\u00e9rmica<\/strong><\/a><a title=\"Efici\u00eancia t\u00e9rmica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-eficiencia-termica-definicao\/\">\u00a0,\u00a0<\/a><a title=\"Efici\u00eancia t\u00e9rmica\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-eficiencia-termica-definicao\/\"><strong><em>\u03b7\u00a0<\/em><\/strong><\/a><a title=\"Efici\u00eancia t\u00e9rmica\" 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.<\/span><\/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<\/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>O ciclo duplo, ou ciclo de press\u00e3o limitado, \u00e9 um ciclo termodin\u00e2mico que combina o ciclo Otto e o ciclo Diesel.\u00a0Um ciclo duplo consiste em cinco processos termodin\u00e2micos.\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 ocorre em &#8230; <a title=\"O que \u00e9 Ciclo Duplo &#8211; Ciclo de Press\u00e3o Limitado &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-ciclo-duplo-ciclo-de-pressao-limitado-definicao\/\" aria-label=\"More on O que \u00e9 Ciclo Duplo &#8211; Ciclo de Press\u00e3o Limitado &#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 Ciclo Duplo - Ciclo de Press\u00e3o Limitado - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Ciclo duplo, ou ciclo de press\u00e3o limitado, \u00e9 um ciclo termodin\u00e2mico que combina o ciclo Otto e o ciclo Diesel. 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