{"id":700642,"date":"2024-11-16T05:34:33","date_gmt":"2024-11-16T04:34:33","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=700642"},"modified":"2024-11-16T05:34:33","modified_gmt":"2024-11-16T04:34:33","slug":"truyen-nhiet-trong-lo-phan-ung-nhiet-do-cao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-lo-phan-ung-nhiet-do-cao\/","title":{"rendered":"Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao"},"content":{"rendered":"<p class=\"sidekick\">Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao: T\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1eeb ngu\u1ed3n nhi\u1ec7t \u0111\u1ebfn v\u1eadt li\u1ec7u \u0111\u00edch, c\u01a1 ch\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong c\u00f4ng nghi\u1ec7p.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/truyen_nhiet_trong_lo_phan_ung_nhiet_do_cao.png\" alt=\"Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n<p>Truy\u1ec1n nhi\u1ec7t l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh quan tr\u1ecdng trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao. L\u00f2 ph\u1ea3n \u1ee9ng n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p n\u0103ng l\u01b0\u1ee3ng h\u1ea1t nh\u00e2n, luy\u1ec7n kim, v\u00e0 s\u1ea3n xu\u1ea5t h\u00f3a ch\u1ea5t. Hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t gi\u00fap t\u0103ng hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 an to\u00e0n c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng.<\/p>\n<h2>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t<\/h2>\n<p>C\u00f3 ba ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh \u0111\u1ec3 truy\u1ec1n nhi\u1ec7t:<\/p>\n<p><u1><\/p>\n<li>D\u1eabn nhi\u1ec7t<\/li>\n<li>\u0110\u1ed1i l\u01b0u<\/li>\n<li>B\u1ee9c x\u1ea1 nhi\u1ec7t<\/li>\n<p><\/u1><\/p>\n<h3>D\u1eabn nhi\u1ec7t (Conduction)<\/h3>\n<p>D\u1eabn nhi\u1ec7t l\u00e0 qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t th\u00f4ng qua v\u1eadt li\u1ec7u. N\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u, \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi c\u00f4ng th\u1ee9c:<\/p>\n<p><i>q = -k \\frac{dT}{dx}<\/i><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><u1><\/p>\n<li><i>q<\/i>: T\u1ed1c \u0111\u1ed9 truy\u1ec1n nhi\u1ec7t<\/li>\n<li><i>k<\/i>: \u0110\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u<\/li>\n<li><i>\\frac{dT}{dx}<\/i>: \u0110\u1ed9 bi\u1ebfn thi\u00ean nhi\u1ec7t \u0111\u1ed9 theo kho\u1ea3ng c\u00e1ch<\/li>\n<p><\/u1><\/p>\n<h3>\u0110\u1ed1i l\u01b0u (Convection)<\/h3>\n<p>\u0110\u1ed1i l\u01b0u l\u00e0 qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t qua ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed. C\u00f3 hai lo\u1ea1i \u0111\u1ed1i l\u01b0u: t\u1ef1 nhi\u00ean v\u00e0 c\u01b0\u1ee1ng b\u1ee9c. C\u00f4ng th\u1ee9c t\u00ednh th\u01b0\u1eddng s\u1eed d\u1ee5ng l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh Newton v\u1ec1 l\u00e0m m\u00e1t:<\/p>\n<p><i>q = hA(T_s &#8211; T_\\infty)<\/i><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><u1><\/p>\n<li><i>q<\/i>: T\u1ed1c \u0111\u1ed9 truy\u1ec1n nhi\u1ec7t<\/li>\n<li><i>h<\/i>: H\u1ec7 s\u1ed1 \u0111\u1ed1i l\u01b0u<\/li>\n<li><i>A<\/i>: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t<\/li>\n<li><i>T_s<\/i>: Nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t<\/li>\n<li><i>T_\\infty<\/i>: Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh<\/li>\n<p><\/u1><\/p>\n<h3>B\u1ee9c x\u1ea1 nhi\u1ec7t (Radiation)<\/h3>\n<p>B\u1ee9c x\u1ea1 nhi\u1ec7t l\u00e0 qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t qua s\u00f3ng \u0111i\u1ec7n t\u1eeb. N\u00f3 r\u1ea5t quan tr\u1ecdng trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao v\u00ec nhi\u1ec7t \u0111\u1ed9 c\u1ef1c k\u1ef3 cao cho ph\u00e9p b\u1ee9c x\u1ea1 nhi\u1ec7t \u0111\u00e1ng k\u1ec3. C\u00f4ng th\u1ee9c t\u00ednh b\u1ee9c x\u1ea1 nhi\u1ec7t l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh Stefan-Boltzmann:<\/p>\n<p><i>q = \\sigma A (T_s^4 &#8211; T_\\infty^4)<\/i><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><u1><\/p>\n<li><i>q<\/i>: T\u1ed1c \u0111\u1ed9 truy\u1ec1n nhi\u1ec7t<\/li>\n<li><i>\\sigma<\/i>: H\u1eb1ng s\u1ed1 Stefan-Boltzmann (5.67 x 10<sup>-8<\/sup> W\/m<sup>2<\/sup>K<sup>4<\/sup>)<\/li>\n<li><i>A<\/i>: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t<\/li>\n<li><i>T_s<\/i>: Nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t<\/li>\n<li><i>T_\\infty<\/i>: Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh<\/li>\n<p><\/u1><\/p>\n<h2>\u1ee8ng d\u1ee5ng trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n<p>Trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t n\u00e0y th\u01b0\u1eddng k\u1ebft h\u1ee3p v\u1edbi nhau \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh. V\u00ed d\u1ee5, trong m\u1ed9t l\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n, c\u00e1c thanh nhi\u00ean li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m m\u00e1t b\u1eb1ng \u0111\u1ed1i l\u01b0u c\u01b0\u1ee1ng b\u1ee9c, b\u1ee9c x\u1ea1 nhi\u1ec7t v\u00e0 d\u1eabn nhi\u1ec7t th\u00f4ng qua ch\u1ea5t d\u1eabn nhi\u1ec7t.<\/p>\n<p>Vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 truy\u1ec1n nhi\u1ec7t gi\u00fap c\u00e1c k\u1ef9 s\u01b0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng hi\u1ec7u qu\u1ea3, an to\u00e0n v\u00e0 b\u1ec1n v\u1eefng. \u0110\u1ed3ng th\u1eddi, n\u00f3 c\u0169ng gi\u00fap t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng, gi\u1ea3m hao ph\u00ed, v\u00e0 n\u00e2ng cao hi\u1ec7u qu\u1ea3 l\u00e0m vi\u1ec7c c\u1ee7a l\u00f2 ph\u1ea3n \u1ee9ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao: T\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1eeb ngu\u1ed3n nhi\u1ec7t \u0111\u1ebfn v\u1eadt li\u1ec7u \u0111\u00edch, c\u01a1 ch\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong c\u00f4ng nghi\u1ec7p.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao<\/title>\n<meta name=\"description\" content=\"Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao: T\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1eeb ngu\u1ed3n nhi\u1ec7t \u0111\u1ebfn v\u1eadt li\u1ec7u \u0111\u00edch, c\u01a1 ch\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong c\u00f4ng nghi\u1ec7p.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-lo-phan-ung-nhiet-do-cao\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao\" \/>\n<meta property=\"og:description\" content=\"Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 cao: T\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1eeb ngu\u1ed3n nhi\u1ec7t \u0111\u1ebfn v\u1eadt li\u1ec7u \u0111\u00edch, c\u01a1 ch\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong c\u00f4ng nghi\u1ec7p.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-lo-phan-ung-nhiet-do-cao\/\" \/>\n<meta property=\"og:site_name\" content=\"Thermal Engineering\" \/>\n<meta property=\"article:published_time\" content=\"2024-11-16T04:34:33+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/truyen_nhiet_trong_lo_phan_ung_nhiet_do_cao.png\" \/>\n<meta name=\"twitter:card\" content=\"summary\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\">\n\t<meta name=\"twitter:data1\" content=\"Nick Connor\">\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\">\n\t<meta name=\"twitter:data2\" content=\"3 minutes\">\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#website\",\"url\":\"https:\/\/www.thermal-engineering.org\/fr\/\",\"name\":\"Thermal Engineering\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/www.thermal-engineering.org\/fr\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"vi-VN\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-lo-phan-ung-nhiet-do-cao\/#primaryimage\",\"inLanguage\":\"vi-VN\",\"url\":\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/truyen_nhiet_trong_lo_phan_ung_nhiet_do_cao.png\",\"width\":1000,\"height\":1000,\"caption\":\"Truy\\u1ec1n nhi\\u1ec7t trong l\\u00f2 ph\\u1ea3n \\u1ee9ng nhi\\u1ec7t \\u0111\\u1ed9 cao\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-lo-phan-ung-nhiet-do-cao\/#webpage\",\"url\":\"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-lo-phan-ung-nhiet-do-cao\/\",\"name\":\"Truy\\u1ec1n nhi\\u1ec7t trong l\\u00f2 ph\\u1ea3n \\u1ee9ng nhi\\u1ec7t \\u0111\\u1ed9 cao\",\"isPartOf\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-lo-phan-ung-nhiet-do-cao\/#primaryimage\"},\"datePublished\":\"2024-11-16T04:34:33+00:00\",\"dateModified\":\"2024-11-16T04:34:33+00:00\",\"author\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\"},\"description\":\"Truy\\u1ec1n nhi\\u1ec7t trong l\\u00f2 ph\\u1ea3n \\u1ee9ng nhi\\u1ec7t \\u0111\\u1ed9 cao: T\\u00ecm hi\\u1ec3u c\\u00e1ch nhi\\u1ec7t \\u0111\\u01b0\\u1ee3c chuy\\u1ec3n t\\u1eeb ngu\\u1ed3n nhi\\u1ec7t \\u0111\\u1ebfn v\\u1eadt li\\u1ec7u \\u0111\\u00edch, c\\u01a1 ch\\u1ebf v\\u00e0 \\u1ee9ng d\\u1ee5ng th\\u1ef1c t\\u1ebf trong c\\u00f4ng nghi\\u1ec7p.\",\"inLanguage\":\"vi-VN\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-lo-phan-ung-nhiet-do-cao\/\"]}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\",\"name\":\"Nick Connor\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#personlogo\",\"inLanguage\":\"vi-VN\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/84c0dec310b44b65da29dc9df6925239?s=96&d=mm&r=g\",\"caption\":\"Nick Connor\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","_links":{"self":[{"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/posts\/700642"}],"collection":[{"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/comments?post=700642"}],"version-history":[{"count":0,"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/posts\/700642\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/media?parent=700642"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/categories?post=700642"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/tags?post=700642"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}