{"id":40796,"date":"2019-09-25T05:53:32","date_gmt":"2019-09-25T04:53:32","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/what-is-negative-gauge-pressure-vacuum-pressure-definition\/"},"modified":"2020-01-19T15:49:52","modified_gmt":"2020-01-19T14:49:52","slug":"what-is-negative-gauge-pressure-vacuum-pressure-definition","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/es\/what-is-negative-gauge-pressure-vacuum-pressure-definition\/","title":{"rendered":"Qu\u00e9 es la presi\u00f3n negativa del man\u00f3metro &#8211; Presi\u00f3n de vac\u00edo &#8211; Definici\u00f3n"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-clearfix\">Presi\u00f3n negativa del man\u00f3metro &#8211; Presi\u00f3n de vac\u00edo.\u00a0Cuando la presi\u00f3n atmosf\u00e9rica local es mayor que la presi\u00f3n en el sistema, se utiliza el t\u00e9rmino presi\u00f3n de vac\u00edo.\u00a0Ingenieria termal<\/div>\n<\/div>\n<div><\/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>\u00bfQu\u00e9 es la presi\u00f3n?<\/span><\/h2>\n<p><strong><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Manometer-Pressure-Measurement.png\"><img loading=\"lazy\" class=\"alignright size-medium wp-image-16368 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Manometer-Pressure-Measurement-235x300.png\" alt=\"medici\u00f3n de presi\u00f3n de man\u00f3metro\" width=\"235\" height=\"300\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/Manometer-Pressure-Measurement-235x300.png\" \/><\/a><span>La presi\u00f3n<\/span><\/strong><span>\u00a0es una medida de la\u00a0<\/span><strong><span>fuerza ejercida<\/span><\/strong><span>\u00a0por unidad de \u00e1rea en los l\u00edmites de una sustancia.\u00a0La unidad est\u00e1ndar de\u00a0<\/span><strong><span>presi\u00f3n<\/span><\/strong><span>\u00a0en el sistema SI es el\u00a0<\/span><strong><span>Newton por metro cuadrado o pascal (Pa)<\/span><\/strong><span>\u00a0.\u00a0Matem\u00e1ticamente:<\/span><\/p>\n<p><strong><span>p = F \/ A<\/span><\/strong><\/p>\n<p><span>d\u00f3nde<\/span><\/p>\n<ul>\n<li><strong><span>p es la presi\u00f3n<\/span><\/strong><\/li>\n<li><strong><span>F es la fuerza normal<\/span><\/strong><\/li>\n<li><strong><span>A es el \u00e1rea del l\u00edmite<\/span><\/strong><\/li>\n<\/ul>\n<p><span>Pascal se define como la fuerza de 1N que se ejerce sobre el \u00e1rea de la unidad.<\/span><\/p>\n<ul>\n<li><strong><span>1 Pascal = 1 N \/ m\u00a0<\/span><sup><span>2<\/span><\/sup><\/strong><\/li>\n<\/ul>\n<\/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\"><span>Sin embargo, para la mayor\u00eda de los problemas de ingenier\u00eda es una unidad bastante peque\u00f1a, por lo que es conveniente trabajar con m\u00faltiplos del pascal: el\u00a0<\/span><strong><span>kPa<\/span><\/strong><span>\u00a0, la\u00a0<\/span><strong><span>barra<\/span><\/strong><span>\u00a0y el\u00a0<\/span><strong><span>MPa<\/span><\/strong><span>\u00a0.<\/span><\/p>\n<ul>\n<li><strong><span>1 MPa 10\u00a0<\/span><sup><span>6<\/span><\/sup><span>\u00a0N \/ m\u00a0<\/span><sup><span>2<\/span><\/sup><\/strong><\/li>\n<li><strong><span>1 bar 10\u00a0<\/span><sup><span>5<\/span><\/sup><span>\u00a0N \/ m\u00a0<\/span><sup><span>2<\/span><\/sup><\/strong><\/li>\n<li><strong><span>1 kPa 10\u00a0<\/span><sup><span>3<\/span><\/sup><span>\u00a0N \/ m\u00a0<\/span><sup><span>2<\/span><\/sup><\/strong><\/li>\n<\/ul>\n<p><span>En general, la presi\u00f3n o la fuerza ejercida por unidad de \u00e1rea en los l\u00edmites de una sustancia es causada por las\u00a0<\/span><strong><span>colisiones<\/span><\/strong><span>\u00a0de las\u00a0<\/span><strong><span>mol\u00e9culas<\/span><\/strong><span>\u00a0de la sustancia con los l\u00edmites del sistema.\u00a0Cuando las mol\u00e9culas golpean las paredes, ejercen fuerzas que intentan empujar las paredes hacia afuera.\u00a0Las fuerzas resultantes de todas estas colisiones causan la\u00a0<\/span><strong><span>presi\u00f3n<\/span><\/strong><span>\u00a0ejercida por un sistema en su entorno.\u00a0La presi\u00f3n como\u00a0<\/span><a title=\"Propiedades extensivas e intensivas\" href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/thermodynamics\/extensive-and-intensive-properties\/\"><strong><span>variable intensiva<\/span><\/strong><\/a><span>es constante en un sistema cerrado.\u00a0Realmente solo es relevante en sistemas l\u00edquidos o gaseosos.<\/span><\/p>\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\"><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/What-is-Pressure.png\"><img loading=\"lazy\" class=\"aligncenter size-medium wp-image-16371 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/What-is-Pressure-300x129.png\" alt=\"\u00bfQu\u00e9 es la presi\u00f3n?\" width=\"300\" height=\"129\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/What-is-Pressure-300x129.png\" \/><\/a><span>[fragmento de xyz-ihs = &#8220;presi\u00f3n&#8221;]<\/span><\/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>Presi\u00f3n negativa del man\u00f3metro &#8211; Presi\u00f3n de vac\u00edo<\/span><\/h2>\n<p><a href=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/absolute-vs.-gauge-pressure.png\"><img loading=\"lazy\" class=\"alignright size-full wp-image-16281 lazy-loaded\" src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/absolute-vs.-gauge-pressure.png\" alt=\"presi\u00f3n absoluta vs man\u00f3metro\" width=\"388\" height=\"247\" data-lazy-type=\"image\" data-src=\"https:\/\/thermal-engineering.org\/wp-content\/uploads\/2019\/05\/absolute-vs.-gauge-pressure.png\" \/><\/a><strong><span>Presi\u00f3n negativa del man\u00f3metro &#8211; Presi\u00f3n de vac\u00edo.\u00a0<\/span><\/strong><span>Cuando la presi\u00f3n atmosf\u00e9rica local es mayor que la presi\u00f3n en el sistema, se utiliza el t\u00e9rmino\u00a0<\/span><strong><span>presi\u00f3n de vac\u00edo<\/span><\/strong><span>\u00a0.\u00a0Un vac\u00edo perfecto corresponder\u00eda a la presi\u00f3n cero absoluta.\u00a0Ciertamente es posible tener una presi\u00f3n manom\u00e9trica negativa, pero no es posible tener una presi\u00f3n absoluta negativa.\u00a0Por ejemplo, una presi\u00f3n absoluta de 80 kPa puede describirse como una presi\u00f3n manom\u00e9trica de \u221221 kPa (es decir, 21 kPa por debajo de una presi\u00f3n atmosf\u00e9rica de 101 kPa).<\/span><\/p>\n<p><em><span>p\u00a0<\/span><\/em><em><sub><span>vac\u00edo<\/span><\/sub><\/em><em><span>\u00a0= p\u00a0<\/span><\/em><em><sub><span>absoluto;\u00a0cajero autom\u00e1tico<\/span><\/sub><\/em><em><span>\u00a0&#8211; p\u00a0<\/span><\/em><em><sub><span>absoluto<\/span><\/sub><\/em><\/p>\n<p><span>Por ejemplo, las\u00a0<\/span><span>turbinas de<\/span><span>\u00a0vapor de condensaci\u00f3n\u00a0\u00a0(en\u00a0<a title=\"Planta de energ\u00eda nuclear\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/\">plantas de energ\u00eda nuclear<\/a>\u00a0) expulsan\u00a0<a title=\"Propiedades de Steam - Qu\u00e9 es Steam\" href=\"https:\/\/www.thermal-engineering.org\/es\/que-es-steam-propiedades-de-steam-definicion\/\">vapor<\/a>\u00a0a una presi\u00f3n muy por debajo de la atmosf\u00e9rica\u00a0<\/span><span>(por ejemplo, a 0.08 bar u 8 kPa o 1.16 psia)\u00a0<\/span><span>y en un estado parcialmente condensado.\u00a0En unidades relativas es una presi\u00f3n manom\u00e9trica negativa de aproximadamente &#8211; 0.92 bar, &#8211; 92 kPa, o &#8211; 13.54 psig.<\/span><\/p>\n<\/div>\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<div class=\"su-spacer\">&#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;.<\/div>\n<\/div>\n<\/div>\n<p>Este art\u00edculo se basa en la traducci\u00f3n autom\u00e1tica del art\u00edculo original en ingl\u00e9s. Para m\u00e1s informaci\u00f3n vea el art\u00edculo en ingl\u00e9s. Puedes ayudarnos. Si desea corregir la traducci\u00f3n, env\u00edela a: translations@nuclear-power.com o complete el formulario de traducci\u00f3n en l\u00ednea. Agradecemos su ayuda, actualizaremos la traducci\u00f3n lo antes posible. Gracias.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Presi\u00f3n negativa del man\u00f3metro &#8211; Presi\u00f3n de vac\u00edo.\u00a0Cuando la presi\u00f3n atmosf\u00e9rica local es mayor que la presi\u00f3n en el sistema, se utiliza el t\u00e9rmino presi\u00f3n de vac\u00edo.\u00a0Ingenieria termal \u00bfQu\u00e9 es la presi\u00f3n? La presi\u00f3n\u00a0es una medida de la\u00a0fuerza ejercida\u00a0por unidad de \u00e1rea en los l\u00edmites de una sustancia.\u00a0La unidad est\u00e1ndar de\u00a0presi\u00f3n\u00a0en el sistema SI es &#8230; <a title=\"Qu\u00e9 es la presi\u00f3n negativa del man\u00f3metro &#8211; Presi\u00f3n de vac\u00edo &#8211; Definici\u00f3n\" class=\"read-more\" href=\"https:\/\/www.thermal-engineering.org\/es\/what-is-negative-gauge-pressure-vacuum-pressure-definition\/\" aria-label=\"M\u00e1s en Qu\u00e9 es la presi\u00f3n negativa del man\u00f3metro &#8211; Presi\u00f3n de vac\u00edo &#8211; Definici\u00f3n\">Leer m\u00e1s<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu\u00e9 es la presi\u00f3n negativa del man\u00f3metro - Presi\u00f3n de vac\u00edo - Definici\u00f3n<\/title>\n<meta name=\"description\" content=\"Presi\u00f3n negativa del man\u00f3metro - Presi\u00f3n de vac\u00edo. 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