{"id":47364,"date":"2019-11-04T04:30:19","date_gmt":"2019-11-04T03:30:19","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-ebulicao-sub-resfriada-definicao\/"},"modified":"2020-01-23T10:59:20","modified_gmt":"2020-01-23T09:59:20","slug":"o-que-e-ebulicao-sub-resfriada-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-ebulicao-sub-resfriada-definicao\/","title":{"rendered":"O que \u00e9 ebuli\u00e7\u00e3o sub-resfriada &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Na ebuli\u00e7\u00e3o sub-resfriada, a temperatura da maior parte do l\u00edquido est\u00e1 abaixo da temperatura de satura\u00e7\u00e3o e as bolhas formadas na superf\u00edcie podem condensar-se no l\u00edquido.\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-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>Ebuli\u00e7\u00e3o sub-resfriada<\/h2>\n<p>Na\u00a0<strong>ebuli\u00e7\u00e3o sub-resfriada<\/strong>\u00a0, a temperatura da maior parte do l\u00edquido est\u00e1 abaixo da temperatura de satura\u00e7\u00e3o e as bolhas formadas na superf\u00edcie podem\u00a0<strong>condensar-se no l\u00edquido<\/strong>\u00a0.\u00a0Essa condensa\u00e7\u00e3o (colapso) produz um som de frequ\u00eancia ~ 100Hz &#8211; 1 KHz.\u00a0\u00c9 por isso que uma chaleira el\u00e9trica faz mais barulho antes que a \u00e1gua ferva saturada.\u00a0O termo\u00a0<strong>sub-resfriamento<\/strong>\u00a0refere-se a um l\u00edquido existente a uma temperatura\u00a0<strong>abaixo do<\/strong>\u00a0seu ponto de ebuli\u00e7\u00e3o normal.<\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Subcooled-Boiling-Boiling-Modes.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20785 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Subcooled-Boiling-Boiling-Modes.png\" alt=\"Ebuli\u00e7\u00e3o Sub-resfriada - Modos de Ebuli\u00e7\u00e3o\" width=\"616\" height=\"475\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Subcooled-Boiling-Boiling-Modes.png\" \/><\/a><\/p>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\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>Ebuli\u00e7\u00e3o sub-resfriada em PWRs<\/span><\/h2>\n<p><span>Embora os projetos mais antigos do n\u00facleo considerassem que\u00a0\u00a0<\/span><strong><span>a ebuli\u00e7\u00e3o da superf\u00edcie sub-resfriada<\/span><\/strong><span>\u00a0n\u00e3o poderia ser permitida nas\u00a0<\/span><a title=\"PWR - Reator de \u00e1gua pressurizada\" href=\"https:\/\/www.nuclear-power.com\/pwr-pressurized-water-reactor\/\"><strong><span>PWRs<\/span><\/strong><\/a><span>\u00a0, essa suposi\u00e7\u00e3o foi logo rejeitada e a transfer\u00eancia de calor em duas fases \u00e9 agora um dos mecanismos normais de transfer\u00eancia de calor de opera\u00e7\u00e3o tamb\u00e9m nas PWRs.\u00a0Para PWRs em opera\u00e7\u00e3o normal, h\u00e1\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-steam-what-is-steam\/saturated-and-subcooled-liquid\/\"><span>\u00e1gua l\u00edquida comprimida<\/span><\/a><span>\u00a0dentro do n\u00facleo do reator, loops e geradores de vapor.\u00a0A press\u00e3o \u00e9 mantida em aproximadamente\u00a0<\/span><strong><span>16MPa<\/span><\/strong><span>\u00a0.\u00a0A essa press\u00e3o, a \u00e1gua ferve a aproximadamente\u00a0<\/span><strong><span>350 \u00b0 C<\/span><\/strong><span>(662 \u00b0 F), que fornece uma margem de sub-resfriamento (a diferen\u00e7a entre a temperatura do pressurizador e a temperatura de sa\u00edda do l\u00edquido de arrefecimento no n\u00facleo do reator) de 30 \u00b0 C.\u00a0Vale ressaltar que essa margem de sub-resfriamento diz respeito \u00e0 temperatura do volume, uma vez que a ebuli\u00e7\u00e3o do volume \u00e9 proibida.<\/span><\/p>\n<p><span>A margem de sub-resfriamento \u00e9 um par\u00e2metro de seguran\u00e7a muito importante dos PWRs, pois a ebuli\u00e7\u00e3o a granel no n\u00facleo do reator deve ser exclu\u00edda.\u00a0O projeto b\u00e1sico do\u00a0\u00a0<\/span><strong><span>reator de \u00e1gua pressurizada\u00a0<\/span><\/strong><span>\u00a0inclui tal requisito que o l\u00edquido de refrigera\u00e7\u00e3o (\u00e1gua) no sistema de refrigera\u00e7\u00e3o do reator n\u00e3o deve ferver.\u00a0Para conseguir isso, o l\u00edquido de refrigera\u00e7\u00e3o no sistema de refrigera\u00e7\u00e3o do reator \u00e9 mantido a uma press\u00e3o suficientemente alta para que a ebuli\u00e7\u00e3o n\u00e3o ocorra nas temperaturas do l\u00edquido de refrigera\u00e7\u00e3o experimentadas enquanto a planta est\u00e1 em opera\u00e7\u00e3o ou em um transiente analisado.<\/span><\/p>\n<p><span>Como foi\u00a0<\/span><a title=\"Exemplo - Convec\u00e7\u00e3o - Problema com Solu\u00e7\u00e3o\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/heat-transfer\/convection-convective-heat-transfer\/example-convection-problem-with-solution\/\"><span>calculado no exemplo<\/span><\/a><span>\u00a0, a temperatura da superf\u00edcie T\u00a0<\/span><sub><span>Zr, 1<\/span><\/sub><span>\u00a0= 325 \u00b0 C garante que mesmo a ebuli\u00e7\u00e3o sub-resfriada n\u00e3o ocorra.\u00a0Observe que a ebuli\u00e7\u00e3o sub-resfriada requer T\u00a0<\/span><sub><span>Zr, 1<\/span><\/sub><span>\u00a0= T\u00a0<\/span><sub><span>sat<\/span><\/sub><span>\u00a0.\u00a0Como as temperaturas de entrada da \u00e1gua s\u00e3o geralmente de cerca de\u00a0<\/span><strong><span>290 \u00b0 C<\/span><\/strong><span>\u00a0(554 \u00b0 F), \u00e9 \u00f3bvio que este exemplo corresponde \u00e0 parte inferior do n\u00facleo.\u00a0Em eleva\u00e7\u00f5es mais altas do n\u00facleo, a temperatura a granel pode atingir at\u00e9 330 \u00b0 C.\u00a0A diferen\u00e7a de temperatura de 29 \u00b0 C causa a\u00a0<\/span><strong><span>fervura da superf\u00edcie sub<\/span><\/strong><span>\u00a0&#8211;\u00a0<strong>resfriada<\/strong>\u00a0(330 \u00b0 C + 29 \u00b0 C&gt; 350 \u00b0 C).\u00a0Por outro lado, a\u00a0<\/span><strong><span>ebuli\u00e7\u00e3o nucleada<\/span><\/strong><span>na superf\u00edcie interrompe efetivamente a camada estagnada e, portanto, a ebuli\u00e7\u00e3o nucleada aumenta significativamente a capacidade de uma superf\u00edcie de transferir\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/what-is-energy-physics\/internal-energy-thermal-energy\/\"><span>energia t\u00e9rmica<\/span><\/a><span>\u00a0para o fluido a granel.\u00a0Como resultado, o coeficiente de transfer\u00eancia de calor por convec\u00e7\u00e3o aumenta significativamente e, portanto, em eleva\u00e7\u00f5es mais altas, a diferen\u00e7a de temperatura (T\u00a0<\/span><sub><span>Zr,\u00a0<\/span><\/sub><sub><span>volume\u00a0<\/span><\/sub><span><sub>1<\/sub>\u00a0&#8211; T\u00a0) diminui significativamente.<\/span><\/p>\n<p><span>No caso de\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/pwr-pressurized-water-reactor\/\"><span>PWRs<\/span><\/a><span>\u00a0, a quest\u00e3o cr\u00edtica de seguran\u00e7a \u00e9 denominada\u00a0<\/span><strong><span>DNB<\/span><\/strong><span>\u00a0(\u00a0<\/span><strong><span>partida da ebuli\u00e7\u00e3o nucleada<\/span><\/strong><span>\u00a0), que causa a forma\u00e7\u00e3o de uma\u00a0<\/span><strong><span>camada de vapor local<\/span><\/strong><span>\u00a0, causando uma redu\u00e7\u00e3o dr\u00e1stica na capacidade de transfer\u00eancia de calor.\u00a0Esse fen\u00f4meno ocorre na regi\u00e3o sub-resfriada ou de baixa qualidade.\u00a0O comportamento da crise de ebuli\u00e7\u00e3o depende de muitas condi\u00e7\u00f5es de fluxo (press\u00e3o, temperatura, taxa de fluxo), mas a crise de ebuli\u00e7\u00e3o ocorre em fluxos de calor relativamente altos e parece estar associado \u00e0 nuvem de bolhas adjacentes \u00e0 superf\u00edcie.\u00a0Essas bolhas ou filme de vapor reduzem a quantidade de \u00e1gua que entra.\u00a0Como esse fen\u00f4meno deteriora o coeficiente de transfer\u00eancia de calor e o fluxo de calor permanece, o calor\u00a0<\/span><strong><span>acumula-se<\/span><\/strong><span>na barra de combust\u00edvel, causando\u00a0<\/span><strong><span>aumento dram\u00e1tico<\/span><\/strong><span>\u00a0do revestimento e da\u00a0<\/span><strong><span>temperatura do<\/span><\/strong><span>\u00a0combust\u00edvel\u00a0.<\/span><\/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<div class=\"su-spacer\"><\/div>\n<h2><span>Ebuli\u00e7\u00e3o Nucleada &#8211; Ebuli\u00e7\u00e3o por Fluxo<\/span><\/h2>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Flow-Boiling-Boiling-Modes.png\"><img loading=\"lazy\" class=\"alignright size-medium wp-image-20784 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Flow-Boiling-Boiling-Modes-117x300.png\" alt=\"Ebuli\u00e7\u00e3o do fluxo - modos de ebuli\u00e7\u00e3o\" width=\"117\" height=\"300\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Flow-Boiling-Boiling-Modes-117x300.png\" \/><\/a><span>Na\u00a0<\/span><strong><span>fervura de fluxo<\/span><\/strong><span>\u00a0(ou\u00a0<\/span><strong><span>fervura de convec\u00e7\u00e3o for\u00e7ada<\/span><\/strong><span>\u00a0), o fluxo de fluido \u00e9 for\u00e7ado sobre uma superf\u00edcie por meios externos, como uma bomba, bem como por efeitos de flutuabilidade.\u00a0Portanto, a ebuli\u00e7\u00e3o do fluxo \u00e9 sempre acompanhada por outros efeitos de convec\u00e7\u00e3o.\u00a0As condi\u00e7\u00f5es dependem fortemente da geometria, que pode envolver fluxo externo sobre placas e cilindros aquecidos ou fluxo interno (duto).\u00a0Nos reatores nucleares, a maioria dos regimes de ebuli\u00e7\u00e3o \u00e9 apenas fervura de convec\u00e7\u00e3o for\u00e7ada.\u00a0A ebuli\u00e7\u00e3o do fluxo tamb\u00e9m \u00e9 classificada como ebuli\u00e7\u00e3o externa e interna, dependendo de o fluido ser for\u00e7ado a fluir sobre uma superf\u00edcie aquecida ou dentro de um canal aquecido.<\/span><\/p>\n<p><span>A ebuli\u00e7\u00e3o do fluxo interno \u00e9 muito mais complicada por natureza do que a ebuli\u00e7\u00e3o do fluxo externo, porque n\u00e3o h\u00e1 superf\u00edcie livre para o vapor escapar e, portanto, o l\u00edquido e o vapor s\u00e3o for\u00e7ados a fluir juntos.\u00a0O fluxo de duas fases em um tubo exibe diferentes regimes de ebuli\u00e7\u00e3o do fluxo, dependendo das quantidades relativas das fases l\u00edquida e de vapor.\u00a0Portanto, a ebuli\u00e7\u00e3o por convec\u00e7\u00e3o for\u00e7ada interna \u00e9 geralmente chamada de\u00a0<\/span><strong><span>fluxo bif\u00e1sico<\/span><\/strong><span>\u00a0.<\/span><\/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<div class=\"su-spacer\"><\/div>\n<h2><span>Correla\u00e7\u00f5es de ebuli\u00e7\u00e3o de nucleados &#8211; ebuli\u00e7\u00e3o por fluxo<\/span><\/h2>\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>Correla\u00e7\u00e3o de McAdams<\/span><\/h2>\n<p><span>Na ebuli\u00e7\u00e3o de nucleados totalmente desenvolvida com refrigerante saturado, a temperatura da parede \u00e9 determinada pelo fluxo de calor e press\u00e3o locais e depende apenas ligeiramente do\u00a0<\/span><a title=\"N\u00famero de Reynolds\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/fluid-dynamics\/reynolds-number\/\"><span>n\u00famero de Reynolds<\/span><\/a><span>\u00a0.\u00a0Para \u00e1gua sub-resfriada a press\u00f5es absolutas entre 0,1 &#8211; 0,6 MPa, a\u00a0<\/span><strong><span>correla\u00e7\u00e3o de McAdams<\/span><\/strong><span>\u00a0fornece:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/nucleate-boiling-McAdams-Correlation.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20789 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/nucleate-boiling-McAdams-Correlation.png\" alt=\"ebuli\u00e7\u00e3o nucleada - Correla\u00e7\u00e3o de McAdams\" width=\"453\" height=\"86\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/nucleate-boiling-McAdams-Correlation.png\" \/><\/a><\/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<div class=\"su-spacer\"><\/div>\n<h2><span>Correla\u00e7\u00e3o de Thom<\/span><\/h2>\n<p><span>A\u00a0<\/span><strong><span>correla\u00e7\u00e3o de Thom<\/span><\/strong><span>\u00a0\u00e9 para a ebuli\u00e7\u00e3o do fluxo (sub-resfriado ou saturado a press\u00f5es de at\u00e9 cerca de 20 MPa) sob condi\u00e7\u00f5es em que a contribui\u00e7\u00e3o da ebuli\u00e7\u00e3o nucleada predomina sobre a convec\u00e7\u00e3o for\u00e7ada.\u00a0Essa correla\u00e7\u00e3o \u00e9 \u00fatil para a estimativa aproximada da diferen\u00e7a de temperatura esperada, dado o fluxo de calor:<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/nucleate-boiling-Thom-Correlation.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20790 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/nucleate-boiling-Thom-Correlation.png\" alt=\"ebuli\u00e7\u00e3o de nucleados - Correla\u00e7\u00e3o de Thom\" width=\"377\" height=\"147\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/nucleate-boiling-Thom-Correlation.png\" \/><\/a><\/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<div class=\"su-spacer\"><\/div>\n<h2><span>Correla\u00e7\u00e3o de Chen<\/span><\/h2>\n<p><span>Em 1963,\u00a0<\/span><strong><span>Chen<\/span><\/strong><span>\u00a0prop\u00f4s a primeira correla\u00e7\u00e3o de ebuli\u00e7\u00e3o do fluxo para a evapora\u00e7\u00e3o em tubos verticais, a fim de obter amplo uso.\u00a0<\/span><strong><span>A correla\u00e7\u00e3o de Chen<\/span><\/strong><span>\u00a0inclui os\u00a0<\/span><a title=\"Coeficiente de transfer\u00eancia de calor por convec\u00e7\u00e3o\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-coeficiente-de-transferencia-de-calor-por-conveccao-definicao\/\"><span>coeficientes de transfer\u00eancia de calor<\/span><\/a><span>\u00a0devido \u00e0\u00a0<\/span><strong><span>ebuli\u00e7\u00e3o dos nucleados<\/span><\/strong><span>\u00a0, bem como os\u00a0<\/span><strong><span>mecanismos convectivos for\u00e7ados<\/span><\/strong><span>.\u00a0Deve-se notar que, em fra\u00e7\u00f5es de vapor mais altas, o coeficiente de transfer\u00eancia de calor varia fortemente com a vaz\u00e3o.\u00a0A velocidade do fluxo em um n\u00facleo pode ser muito alta, causando turbul\u00eancias muito altas.\u00a0Esse mecanismo de transfer\u00eancia de calor foi referido como &#8220;evapora\u00e7\u00e3o for\u00e7ada por convec\u00e7\u00e3o&#8221;.\u00a0Nenhum crit\u00e9rio adequado foi estabelecido para determinar a transi\u00e7\u00e3o da ebuli\u00e7\u00e3o nucleada para a vaporiza\u00e7\u00e3o por convec\u00e7\u00e3o for\u00e7ada.\u00a0No entanto, Chen desenvolveu uma correla\u00e7\u00e3o \u00fanica v\u00e1lida para a ebuli\u00e7\u00e3o nucleada e a vaporiza\u00e7\u00e3o por convec\u00e7\u00e3o for\u00e7ada, para condi\u00e7\u00f5es de ebuli\u00e7\u00e3o saturada e estendida para incluir a ebuli\u00e7\u00e3o sub-resfriada por outros.\u00a0Chen prop\u00f4s uma correla\u00e7\u00e3o em que o coeficiente de transfer\u00eancia de calor \u00e9 a\u00a0<\/span><strong><span>soma<\/span><\/strong><span>\u00a0de um\u00a0componente de\u00a0<\/span><strong><span>convec\u00e7\u00e3o for\u00e7ada<\/span><\/strong><span>\u00a0e uma\u00a0<\/span><strong><span>ebuli\u00e7\u00e3o nucleada<\/span><\/strong><span>componente.\u00a0Deve-se observar que a correla\u00e7\u00e3o de ebuli\u00e7\u00e3o de nucleados de Forster e Zuber (1955) \u00e9 usada para calcular o coeficiente de transfer\u00eancia de calor em ebuli\u00e7\u00e3o de nucleados, h\u00a0<\/span><sub><span>FZ<\/span><\/sub><span>\u00a0e a correla\u00e7\u00e3o de fluxo turbulento de Dittus-Boelter (1930) \u00e9 usada para calcular a fase l\u00edquida coeficiente de transfer\u00eancia de calor por convec\u00e7\u00e3o, h\u00a0<\/span><sub><span>l<\/span><\/sub><span>\u00a0.<\/span><\/p>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Chens-Correlation-Forster-Zuber-and-Dittus-Boelter.png\"><img loading=\"lazy\" class=\"aligncenter size-full wp-image-20774 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Chens-Correlation-Forster-Zuber-and-Dittus-Boelter.png\" alt=\"Correla\u00e7\u00e3o de Chens - Forster-Zuber\" width=\"720\" height=\"669\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Chens-Correlation-Forster-Zuber-and-Dittus-Boelter.png\" \/><\/a><\/p>\n<p><span>O fator de supress\u00e3o de ebuli\u00e7\u00e3o dos nucleados, S, \u00e9 a raz\u00e3o entre o superaquecimento efetivo e o superaquecimento da parede.\u00a0\u00c9 respons\u00e1vel pela diminui\u00e7\u00e3o da transfer\u00eancia de calor em ebuli\u00e7\u00e3o porque o superaquecimento efetivo na camada limite \u00e9 menor que o superaquecimento com base na temperatura da parede.\u00a0O multiplicador bif\u00e1sico, F, \u00e9 uma fun\u00e7\u00e3o do par\u00e2metro Martinelli \u03c7\u00a0<\/span><sub><span>tt<\/span><\/sub><span> .<\/span><\/p>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\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>Na ebuli\u00e7\u00e3o sub-resfriada, a temperatura da maior parte do l\u00edquido est\u00e1 abaixo da temperatura de satura\u00e7\u00e3o e as bolhas formadas na superf\u00edcie podem condensar-se no l\u00edquido.\u00a0Engenharia T\u00e9rmica Ebuli\u00e7\u00e3o sub-resfriada Na\u00a0ebuli\u00e7\u00e3o sub-resfriada\u00a0, a temperatura da maior parte do l\u00edquido est\u00e1 abaixo da temperatura de satura\u00e7\u00e3o e as bolhas formadas na superf\u00edcie podem\u00a0condensar-se no l\u00edquido\u00a0.\u00a0Essa condensa\u00e7\u00e3o (colapso) &#8230; <a title=\"O que \u00e9 ebuli\u00e7\u00e3o sub-resfriada &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-ebulicao-sub-resfriada-definicao\/\" aria-label=\"More on O que \u00e9 ebuli\u00e7\u00e3o sub-resfriada &#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 ebuli\u00e7\u00e3o sub-resfriada - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Na ebuli\u00e7\u00e3o sub-resfriada, a temperatura da maior parte do l\u00edquido est\u00e1 abaixo da temperatura de satura\u00e7\u00e3o e as bolhas formadas na superf\u00edcie podem condensar-se no l\u00edquido. 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