{"id":2133,"date":"2021-04-13T13:12:17","date_gmt":"2021-04-13T13:12:17","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2133"},"modified":"2021-04-13T13:14:08","modified_gmt":"2021-04-13T13:14:08","slug":"when-stainless-steel-bellows-used-in-shell-heat-exchanger","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/es\/when-stainless-steel-bellows-used-in-shell-heat-exchanger\/","title":{"rendered":"Cuando los muelles de acero inoxidable se utilizan en los intercambiadores de calor de la carcasa"},"content":{"rendered":"<p>El intercambiador de calor de manguito es una mejora basada en un intercambiador de calor de manguito recto. El dise\u00f1o de la cresta y la depresi\u00f3n de la onda heredan las ventajas del intercambiador de calor tubular, como la durabilidad y la seguridad, y al mismo tiempo superan los defectos como la mala capacidad de transferencia de calor y la f\u00e1cil acumulaci\u00f3n de dep\u00f3sitos. El principio consiste en mejorar el coeficiente total de transferencia de calor para reducir la superficie de transferencia de calor requerida, lo que puede ahorrar materiales y reducir el peso bajo el mismo efecto de transferencia de calor.<\/p>\n<p>Porque el cuerpo del balde se procesa mediante prensado en fr\u00edo\u00a0<a href=\"https:\/\/wldstainless.com\/products\/stainless-steel-u-bend-tube\/\">tubo brillante<\/a> Generalmente se cree que el cuerpo del \u00e9mbolo se puede fortalecer despu\u00e9s de su formaci\u00f3n. Los experimentos de estabilidad a la presi\u00f3n externa muestran que la inestabilidad del tubo de intercambio t\u00e9rmico corrugado bajo presi\u00f3n externa se produce primero en la secci\u00f3n recta del tubo, y el tubo corrugado solo ser\u00e1 inestable si la presi\u00f3n externa contin\u00faa aumentando. Esto indica que la estabilidad de la secci\u00f3n corrugada es mejor que la de la secci\u00f3n recta y que la presi\u00f3n cr\u00edtica de la secci\u00f3n corrugada es mayor que la de la secci\u00f3n recta.<\/p>\n<p>Los experimentos muestran que la ondulaci\u00f3n de la deformaci\u00f3n de flexi\u00f3n se produce en la cavidad de la onda, especialmente en la cavidad de onda local, generalmente no m\u00e1s de dos cavidades en el mismo momento; esto indica que la estabilidad de la cresta de la onda es mejor que la de la cavidad, pero a veces tambi\u00e9n puede producirse lo contrario: en el proceso de presi\u00f3n en fr\u00edo, tanto la cavidad como el espesor de la pared de la secci\u00f3n recta son constantes; despu\u00e9s de la presi\u00f3n en fr\u00edo, el tubo en realidad se vuelve m\u00e1s corto.<\/p>\n<p>La existencia de picos y valles de onda en el bal\u00f3n aumenta el efecto de la convecci\u00f3n de intercambio de calor radial en los tubos, como se muestra en la figura siguiente:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2134\" src=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger.png\" alt=\"\" width=\"840\" height=\"112\" srcset=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger.png 840w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger-300x40.png 300w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger-768x102.png 768w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger-705x94.png 705w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Flow-in-straingt-and-bellow-exchanger-450x60.png 450w\" sizes=\"auto, (max-width: 840px) 100vw, 840px\" \/><\/p>\n<p>La convecci\u00f3n radial tiene una gran influencia en el coeficiente de transferencia de calor total, que es la raz\u00f3n fundamental de la baja precio y la ligera construcci\u00f3n del intercambiador de calor de placa de doble tubo. El \u00e1rea de intercambio de calor del <a href=\"https:\/\/wldstainless.com\/products\/stainless-steel-u-bend-tube\/\">tubo<\/a> La superficie corporal del balde y el tubo recto son grandes a la misma longitud, pero este cambio es mucho menor que la contribuci\u00f3n del cambio en el valor del coeficiente. Se puede observar claramente que la velocidad de flujo del tubo recto (luz) se reduce significativamente cuando se encuentra cerca de la pared del tubo.<\/p>\n<p>El intercambiador de calor de carcasa con balones puede hacer que la velocidad y la direcci\u00f3n del fluido cambien constantemente para formar turbulencias, en comparaci\u00f3n con un intercambiador de tubos rectos, lo que hace que el intercambio de calor con la pared no exista m\u00e1s. Se puede aumentar el coeficiente de transferencia de calor en un 2 a 3 veces, y la operaci\u00f3n real incluso puede llegar a 5 veces, y el peso es ligero, raz\u00f3n por la cual el precio del intercambiador de calor de balones es m\u00e1s bajo que el del intercambiador de tubos rectos. De acuerdo con los c\u00e1lculos y la experiencia pr\u00e1ctica, el coeficiente de transferencia de calor total de un intercambiador de balones de 1 mm de espesor es 10% veces inferior al de un intercambiador de balones de 0,5 mm de espesor. Los datos de operaci\u00f3n de cientos de intercambiadores de balones muestran que el espesor de la pared (casi todos de 0,5 mm) es la principal raz\u00f3n para que funcionen durante 10 a 14 a\u00f1os sin reparaciones ni da\u00f1os importantes.<\/p>\n<p>Adem\u00e1s, el intercambiador de calor de balones puede resistir eficazmente el impacto de un martillo de agua. La carcasa del intercambiador de calor de placa de doble tubo est\u00e1 conectada a una junta de expansi\u00f3n. Si sufre el impacto de un martillo de agua, la junta de expansi\u00f3n se desajustar\u00e1. Esto ocurre tanto con los intercambiadores de calor de balones como con los intercambiadores de calor de tubo recto, y la deformaci\u00f3n de la carcasa puede hacer que el tubo se torce. Esto se debe a que los balones tienen m\u00e1s margen de expansi\u00f3n, el margen el\u00e1stico de la deformaci\u00f3n es grande, es decir, la capacidad de resistir la inestabilidad es fuerte en este caso. Pero en cualquier caso, en el proceso de instalaci\u00f3n para evitar la aparici\u00f3n de un martillo de agua, se puede tomar medidas como el uso de una v\u00e1lvula de asiento angular, un interruptor de retardo y otras medidas.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2135\" src=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Dislocation-deformation-of-expansion-joint.png\" alt=\"\" width=\"439\" height=\"200\" srcset=\"https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Dislocation-deformation-of-expansion-joint.png 439w, https:\/\/wldstainless.com\/wp-content\/uploads\/2021\/04\/Dislocation-deformation-of-expansion-joint-300x137.png 300w\" sizes=\"auto, (max-width: 439px) 100vw, 439px\" \/><\/p>\n<h3>Ventajas del intercambiador de calor de carcasa de acero inoxidable<\/h3>\n<ul>\n<li>Alta eficiencia de transferencia de calor<\/li>\n<\/ul>\n<p>El dise\u00f1o especial de la cresta y la depresi\u00f3n del muelle hace que el flujo de fluido se produzca debido a la mutaci\u00f3n continua de la secci\u00f3n interior y exterior del tubo, formando as\u00ed una fuerte turbulencia. Incluso en el caso de una velocidad de flujo muy baja, el fluido puede generar una fuerte perturbaci\u00f3n dentro y fuera del tubo, lo que mejora considerablemente el coeficiente de transferencia de calor del tubo de intercambio de calor. El coeficiente de transferencia de calor es 2 a 3 veces mayor que el de los intercambiadores de calor de tubo tradicionales.<\/p>\n<ul>\n<li>Sin escalado ni bloqueo<\/li>\n<\/ul>\n<p>El medio dentro y fuera del balde siempre se encuentra en un estado muy turbulento, lo que hace que las part\u00edculas s\u00f3lidas en el medio sean dif\u00edciles de depositar como escamas; Por otra parte, debido a la diferencia de temperatura del medio, se producir\u00e1 una deformaci\u00f3n por expansi\u00f3n axial; la curvatura cambiar\u00e1 con frecuencia; el tubo de intercambio de suciedad y calor producir\u00e1 una gran fuerza de tracci\u00f3n; incluso si la escama se detiene, se desprender\u00e1 autom\u00e1ticamente, de modo que el intercambiador de calor siempre mantendr\u00e1 un rendimiento de transferencia de calor duradero y mejor.<\/p>\n<ul>\n<li>Compensaci\u00f3n autom\u00e1tica<\/li>\n<\/ul>\n<p>La estructura y la forma especiales de los muelles pueden reducir eficazmente la tensi\u00f3n t\u00e9rmica en condiciones de calentamiento sin la necesidad de a\u00f1adir juntas de expansi\u00f3n, simplificando as\u00ed la estructura de los productos y mejorando su fiabilidad.<\/p>\n<ul>\n<li>Vida \u00fatil larga<\/li>\n<\/ul>\n<p>La capacidad de expansi\u00f3n axial se mejora, lo que reduce eficazmente la tensi\u00f3n de la diferencia de temperatura y puede adaptarse a las grandes variaciones de temperatura y presi\u00f3n, por lo que no se producir\u00e1 ninguna fuga causada por la rotura de la boca del tubo. La conexi\u00f3n entre la placa de barrera y el bal\u00f3n prolonga la vida \u00fatil del intercambiador de calor.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>The bellows tube heat exchanger is an upgrade based on a straight (bright) tube heat exchanger. The design of the crest and trough of the wave inherits the advantages of the tubular heat exchanger such as durability and safety, and at the same time overcomes the defects such as poor heat transfer capacity and easy [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2133","post","type-post","status-publish","format-standard","hentry","category-social-activities"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"The shell heat exchanger with bellows can make the fluid speed and direction of constant change to form turbulence compared with a straight tube exchanger.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"WLD Stainless\"\/>\n\t<link rel=\"canonical\" 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