{"id":48753,"date":"2019-11-12T02:28:48","date_gmt":"2019-11-12T01:28:48","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/o-que-e-pressao-tipica-em-engenharia-exemplos-definicao\/"},"modified":"2020-01-30T11:57:34","modified_gmt":"2020-01-30T10:57:34","slug":"o-que-e-pressao-tipica-em-engenharia-exemplos-definicao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-pressao-tipica-em-engenharia-exemplos-definicao\/","title":{"rendered":"O que \u00e9 press\u00e3o t\u00edpica em engenharia &#8211; Exemplos &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Press\u00f5es t\u00edpicas em engenharia e poucos exemplos est\u00e3o resumidos aqui.\u00a0Para a maioria dos problemas de engenharia, o pascal (Pa) \u00e9 uma unidade relativamente pequena, portanto, kPa e MPa s\u00e3o usados.\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>Press\u00f5es t\u00edpicas em engenharia &#8211; Exemplos<\/h2>\n<p><span>O\u00a0<\/span><a title=\"Pascal - Unidade de Press\u00e3o\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/thermodynamic-properties\/what-is-pressure-physics\/pascal-unit-of-pressure\/\"><strong><span>pascal (Pa)<\/span><\/strong><\/a><span>\u00a0como uma unidade de\u00a0medida\u00a0de\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\/\"><span>press\u00e3o<\/span><\/a><span>\u00a0\u00e9 amplamente utilizado em todo o mundo e substituiu amplamente a\u00a0unidade de\u00a0<\/span><strong><span>libras por polegada quadrada (psi)<\/span><\/strong><span>\u00a0, exceto em alguns pa\u00edses que ainda usam o sistema de medi\u00e7\u00e3o imperial, incluindo os Estados Unidos.\u00a0Para a maioria dos problemas de engenharia, o pascal (Pa) \u00e9 uma unidade relativamente pequena, portanto, \u00e9 conveniente trabalhar com m\u00faltiplos do pascal: o kPa, o MPa ou a barra.\u00a0A lista a seguir resume alguns exemplos:<\/span><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><span>Normalmente, a maioria das\u00a0<\/span><strong><span>usinas nucleares<\/span><\/strong><span>\u00a0opera\u00a0<\/span><strong><span>turbinas a vapor de condensa\u00e7\u00e3o de v\u00e1rios est\u00e1gios<\/span><\/strong><span>\u00a0.\u00a0Essas turbinas descarregam\u00a0<\/span><a title=\"Propriedades do Steam - O que \u00e9 o Steam\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-o-steam-propriedades-do-steam-definicao\/\"><span>vapor<\/span><\/a><span>\u00a0a uma press\u00e3o bem abaixo da atmosf\u00e9rica (por exemplo, 0,08 bar ou 8 kPa ou 1,16 psia) e em um estado parcialmente condensado.\u00a0Em unidades relativas, \u00e9 uma press\u00e3o manom\u00e9trica negativa de cerca de &#8211; 0,92 bar, &#8211; 92 kPa ou &#8211; 13,54 psig.<\/span><\/li>\n<li><span>A\u00a0<\/span><strong><span>press\u00e3o atmosf\u00e9rica padr\u00e3o<\/span><\/strong><span>\u00a0aproxima-se da press\u00e3o m\u00e9dia ao n\u00edvel do mar na latitude de 45 \u00b0 N. A\u00a0<\/span><strong><span>press\u00e3o atmosf\u00e9rica padr\u00e3o<\/span><\/strong><span>\u00a0\u00e9 definida ao n\u00edvel do mar a\u00a0<\/span><em><span>273\u00a0<\/span><\/em><em><sup><span>o<\/span><\/sup><\/em><em><span>\u00a0K (0\u00a0<\/span><\/em><em><sup><span>o<\/span><\/sup><\/em><em><span>\u00a0C)<\/span><\/em><span>\u00a0e \u00e9:<\/span>\n<ul>\n<li><strong><em><span>101325 Pa<\/span><\/em><\/strong><\/li>\n<li><strong><em><span>1.01325 bar<\/span><\/em><\/strong><\/li>\n<li><strong><em><span>14.696 psi<\/span><\/em><\/strong><\/li>\n<li><strong><em><span>760 mmHg<\/span><\/em><\/strong><\/li>\n<li><strong><em><span>760 torr<\/span><\/em><\/strong><\/li>\n<\/ul>\n<\/li>\n<li><span>A sobrepress\u00e3o de pneus de carro \u00e9 de cerca de 2,5 bar, 0,25 MPa ou 36 psig.<\/span><\/li>\n<li><span>Caldeira de tubos de inc\u00eandio para locomotivas a vapor: 150\u2013250 psig<\/span><\/li>\n<li><span>Um est\u00e1gio de alta press\u00e3o da turbina a vapor de condensa\u00e7\u00e3o na usina nuclear opera em estado estacion\u00e1rio com condi\u00e7\u00f5es de entrada de 6 MPa (60 bar ou 870 psig), t = 275,6 \u00b0 C, x = 1<\/span><\/li>\n<li><span>Um\u00a0<\/span><a title=\"BWR - Reator de \u00e1gua fervente\" href=\"https:\/\/www.nuclear-power.com\/bwr-boiling-water-reactor\/\"><strong><span>reator de \u00e1gua fervente<\/span><\/strong><\/a><span>\u00a0\u00e9 resfriado e moderado por\u00a0<\/span><a title=\"Propriedades da \u00c1gua\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-of-water\/\"><span>\u00e1gua<\/span><\/a><span>\u00a0como um PWR, mas a uma\u00a0<\/span><strong><span>press\u00e3o mais baixa<\/span><\/strong><span>\u00a0(por exemplo, 7MPa, 70 bar ou 1015 psig), que permite que a \u00e1gua ferva dentro do vaso de press\u00e3o produzindo o vapor que aciona as turbinas.<\/span><\/li>\n<li><a title=\"PWR - Reator de \u00e1gua pressurizada\" href=\"https:\/\/www.nuclear-power.com\/pwr-pressurized-water-reactor\/\"><strong><span>Os reatores de \u00e1gua pressurizada<\/span><\/strong><\/a><span>\u00a0s\u00e3o resfriados e moderados por<\/span><a title=\"L\u00edquido saturado e sub-resfriado\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-steam-what-is-steam\/saturated-and-subcooled-liquid\/\"><span>\u00a0\u00e1gua l\u00edquida de alta press\u00e3o<\/span><\/a><span>\u00a0(por exemplo, 16MPa, 160 bar ou 2320 psig).\u00a0A essa press\u00e3o, a \u00e1gua ferve a aproximadamente 350 \u00b0 C (662 \u00b0 F), o que fornece margem de sub-resfriamento de cerca de 25 \u00b0 C.<\/span><\/li>\n<li><span>O\u00a0<\/span><a title=\"Reator Supercr\u00edtico de \u00c1gua - SCWR\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/reactor-types\/supercritical-water-reactor-scwr\/\"><strong><span>reator de \u00e1gua supercr\u00edtico (SCWR)<\/span><\/strong><\/a><span>\u00a0\u00e9 operado a\u00a0<\/span><strong><span>press\u00e3o supercr\u00edtica<\/span><\/strong><span>\u00a0.\u00a0O termo supercr\u00edtico neste contexto refere-se ao\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-of-water\/critical-point-of-water\/\"><strong><span>ponto cr\u00edtico<\/span><\/strong><\/a><span>\u00a0termodin\u00e2mico\u00a0<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-nuclear-engineering\/properties-of-water\/critical-point-of-water\/\"><strong>da \u00e1gua<\/strong><\/a>\u00a0(T\u00a0<\/span><sub><span>CR<\/span><\/sub><span>\u00a0= 374 \u00b0 C; p\u00a0<\/span><sub><span>CR<\/span><\/sub><span>\u00a0= 22,1 MPa)<\/span><\/li>\n<li><strong><span>Inje\u00e7\u00e3o direta de combust\u00edvel em trilho comum:<\/span><\/strong><span>\u00a0em motores a diesel, ele possui um\u00a0<strong>trilho de combust\u00edvel de<\/strong>\u00a0alta press\u00e3o (acima de 1 000 bar ou 100 MPa ou 14500 psi).<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\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>Press\u00f5es t\u00edpicas em engenharia e poucos exemplos est\u00e3o resumidos aqui.\u00a0Para a maioria dos problemas de engenharia, o pascal (Pa) \u00e9 uma unidade relativamente pequena, portanto, kPa e MPa s\u00e3o usados.\u00a0Engenharia T\u00e9rmica Press\u00f5es t\u00edpicas em engenharia &#8211; Exemplos O\u00a0pascal (Pa)\u00a0como uma unidade de\u00a0medida\u00a0de\u00a0press\u00e3o\u00a0\u00e9 amplamente utilizado em todo o mundo e substituiu amplamente a\u00a0unidade de\u00a0libras por polegada &#8230; <a title=\"O que \u00e9 press\u00e3o t\u00edpica em engenharia &#8211; Exemplos &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/pt-br\/o-que-e-pressao-tipica-em-engenharia-exemplos-definicao\/\" aria-label=\"More on O que \u00e9 press\u00e3o t\u00edpica em engenharia &#8211; Exemplos &#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 press\u00e3o t\u00edpica em engenharia - Exemplos - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Press\u00f5es t\u00edpicas em engenharia e poucos exemplos s\u00e3o resumidos aqui. 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