{"id":699637,"date":"2024-11-26T20:17:11","date_gmt":"2024-11-26T19:17:11","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=699637"},"modified":"2024-11-26T20:17:11","modified_gmt":"2024-11-26T19:17:11","slug":"su-truyen-nhiet-trong-che-bien-thuc-pham","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/su-truyen-nhiet-trong-che-bien-thuc-pham\/","title":{"rendered":"S\u1ef1 truy\u1ec1n nhi\u1ec7t trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m"},"content":{"rendered":"<p class=\"sidekick\">Truy\u1ec1n nhi\u1ec7t trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m gi\u00fap duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 h\u01b0\u01a1ng v\u1ecb. T\u00ecm hi\u1ec3u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t quan tr\u1ecdng trong ng\u00e0nh th\u1ef1c ph\u1ea9m.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/su_truyen_nhiet_trong_che_bien_thuc_pham.png\" alt=\"S\u1ef1 truy\u1ec1n nhi\u1ec7t trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>S\u1ef1 truy\u1ec1n nhi\u1ec7t trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m<\/h2>\n<p>Trong ng\u00e0nh ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, s\u1ef1 truy\u1ec1n nhi\u1ec7t \u0111\u00f3ng vai tr\u00f2 c\u1ef1c k\u1ef3 quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 an to\u00e0n th\u1ef1c ph\u1ea9m. Hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t gi\u00fap ch\u00fang ta ki\u1ec3m so\u00e1t qu\u00e1 tr\u00ecnh n\u1ea5u n\u01b0\u1edbng, l\u00e0m l\u1ea1nh v\u00e0 b\u1ea3o qu\u1ea3n th\u1ef1c ph\u1ea9m m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<h2>Ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t<\/h2>\n<p><u1><\/p>\n<li>Truy\u1ec1n nhi\u1ec7t d\u1eabn (Conduction)<\/li>\n<li>Truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u (Convection)<\/li>\n<li>B\u1ee9c x\u1ea1 nhi\u1ec7t (Radiation)<\/li>\n<p><\/u1><\/p>\n<p><strong>Truy\u1ec1n nhi\u1ec7t d\u1eabn (Conduction)<\/strong> l\u00e0 qu\u00e1 tr\u00ecnh nhi\u1ec7t \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb v\u00f9ng c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao sang v\u00f9ng c\u00f3 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n qua v\u1eadt ch\u1ea5t, m\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 d\u1ecbch chuy\u1ec3n c\u1ee7a v\u1eadt ch\u1ea5t \u0111\u00f3. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng x\u1ea3y ra trong c\u00e1c v\u1eadt th\u1ec3 r\u1eafn. C\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n c\u1ee7a truy\u1ec1n nhi\u1ec7t d\u1eabn l\u00e0:<\/p>\n<p>Q = k * A * \\(\\frac{dT}{dx}\\)<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><o1><\/p>\n<li>Q: Nhi\u1ec7t l\u01b0\u1ee3ng truy\u1ec1n qua (Watt)<\/li>\n<li>k: H\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t (W\/mK)<\/li>\n<li>A: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t truy\u1ec1n nhi\u1ec7t (m<sup>2<\/sup>)<\/li>\n<li>dT\/dx: Gradient nhi\u1ec7t \u0111\u1ed9 (K\/m)<\/li>\n<p><\/o1><\/p>\n<p><strong>Truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u (Convection)<\/strong> l\u00e0 qu\u00e1 tr\u00ecnh nhi\u1ec7t \u0111\u01b0\u1ee3c truy\u1ec1n qua ch\u1ea5t l\u1ecfng ho\u1eb7c ch\u1ea5t kh\u00ed. Qu\u00e1 tr\u00ecnh n\u00e0y c\u00f3 th\u1ec3 l\u00e0 t\u1ef1 nhi\u00ean ho\u1eb7c c\u01b0\u1ee1ng b\u1ee9c. C\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n c\u1ee7a truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u l\u00e0:<\/p>\n<p>Q = h * A * (T<sub>surface<\/sub> &#8211; T<sub>fluid<\/sub>)<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><o1><\/p>\n<li>Q: Nhi\u1ec7t l\u01b0\u1ee3ng truy\u1ec1n qua (Watt)<\/li>\n<li>h: H\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u (W\/m<sup>2<\/sup>K)<\/li>\n<li>A: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t truy\u1ec1n nhi\u1ec7t (m<sup>2<\/sup>)<\/li>\n<li>T<sub>surface<\/sub>: Nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t (K)<\/li>\n<li>T<sub>fluid<\/sub>: Nhi\u1ec7t \u0111\u1ed9 ch\u1ea5t l\u1ecfng (K)<\/li>\n<p><\/o1><\/p>\n<p><strong>B\u1ee9c x\u1ea1 nhi\u1ec7t (Radiation)<\/strong> l\u00e0 qu\u00e1 tr\u00ecnh nhi\u1ec7t \u0111\u01b0\u1ee3c truy\u1ec1n qua s\u00f3ng \u0111i\u1ec7n t\u1eeb m\u00e0 kh\u00f4ng c\u1ea7n m\u00f4i tr\u01b0\u1eddng v\u1eadt ch\u1ea5t. M\u1ecdi v\u1eadt th\u1ec3 c\u00f3 nhi\u1ec7t \u0111\u1ed9 tr\u00ean tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u1ec1u ph\u00e1t ra b\u1ee9c x\u1ea1 nhi\u1ec7t. C\u00f4ng th\u1ee9c b\u1ee9c x\u1ea1 nhi\u1ec7t \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 b\u1edfi \u0111\u1ecbnh lu\u1eadt Stefan-Boltzmann:<\/p>\n<p>Q = \u03b5 * \u03c3 * A * (T<sup>4<\/sup><sub>1<\/sub> &#8211; T<sup>4<\/sup><sub>2<\/sub>)<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><o1><\/p>\n<li>Q: Nhi\u1ec7t l\u01b0\u1ee3ng truy\u1ec1n qua (Watt)<\/li>\n<li>\u03b5: H\u1ec7 s\u1ed1 ph\u00e1t x\u1ea1 c\u1ee7a b\u1ec1 m\u1eb7t<\/li>\n<li>\u03c3: H\u1ec7 s\u1ed1 Stefan-Boltzmann (5.67 x 10<sup>-8<\/sup> W\/m<sup>2<\/sup>K<sup>4<\/sup>)<\/li>\n<li>A: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t truy\u1ec1n nhi\u1ec7t (m<sup>2<\/sup>)<\/li>\n<li>T<sub>1<\/sub>: Nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t 1 (K)<\/li>\n<li>T<sub>2<\/sub>: Nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t 2 (K)<\/li>\n<p><\/o1><\/p>\n<h2>\u1ee8ng d\u1ee5ng trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m<\/h2>\n<p>Trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, c\u1ea3 ba ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng:<\/p>\n<p><u1><\/p>\n<li><strong>N\u1ea5u n\u01b0\u1edbng:<\/strong> Qu\u00e1 tr\u00ecnh n\u1ea5u n\u01b0\u1edbng th\u01b0\u1eddng s\u1eed d\u1ee5ng ch\u1ee7 y\u1ebfu truy\u1ec1n nhi\u1ec7t d\u1eabn v\u00e0 \u0111\u1ed1i l\u01b0u. Khi n\u1ea5u tr\u00ean b\u1ebfp, nhi\u1ec7t t\u1eeb b\u1ebfp \u0111\u01b0\u1ee3c truy\u1ec1n qua d\u1ee5ng c\u1ee5 n\u1ea5u \u0111\u1ebfn th\u1ef1c ph\u1ea9m.<\/li>\n<li><strong>L\u00e0m l\u1ea1nh v\u00e0 \u0111\u00f4ng l\u1ea1nh:<\/strong> Qu\u00e1 tr\u00ecnh n\u00e0y s\u1eed d\u1ee5ng truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u \u0111\u1ec3 lo\u1ea1i b\u1ecf nhi\u1ec7t t\u1eeb th\u1ef1c ph\u1ea9m. H\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh c\u01b0\u1ee1ng b\u1ee9c gi\u00fap th\u1ef1c ph\u1ea9m ngu\u1ed9i l\u1ea1nh \u0111\u1ec1u, \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 an to\u00e0n.<\/li>\n<li><strong>S\u1ea5y kh\u00f4:<\/strong> S\u1ea5y kh\u00f4 th\u1ef1c ph\u1ea9m s\u1eed d\u1ee5ng c\u1ea3 truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u v\u00e0 b\u1ee9c x\u1ea1 \u0111\u1ec3 lo\u1ea1i b\u1ecf n\u01b0\u1edbc t\u1eeb th\u1ef1c ph\u1ea9m.<\/li>\n<p><\/u1><\/p>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c nguy\u00ean l\u00fd truy\u1ec1n nhi\u1ec7t gi\u00fap t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn v\u00e0 b\u1ea3o qu\u1ea3n th\u1ef1c ph\u1ea9m, \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng \u0111\u1ea1t y\u00eau c\u1ea7u an to\u00e0n v\u00e0 dinh d\u01b0\u1ee1ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Truy\u1ec1n nhi\u1ec7t trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m gi\u00fap duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 h\u01b0\u01a1ng v\u1ecb. T\u00ecm hi\u1ec3u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t quan tr\u1ecdng trong ng\u00e0nh th\u1ef1c ph\u1ea9m.<\/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>S\u1ef1 truy\u1ec1n nhi\u1ec7t trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m<\/title>\n<meta name=\"description\" content=\"Truy\u1ec1n nhi\u1ec7t trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m gi\u00fap duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 h\u01b0\u01a1ng v\u1ecb. T\u00ecm hi\u1ec3u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t quan tr\u1ecdng trong ng\u00e0nh th\u1ef1c ph\u1ea9m.\" \/>\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\/su-truyen-nhiet-trong-che-bien-thuc-pham\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"S\u1ef1 truy\u1ec1n nhi\u1ec7t trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m\" \/>\n<meta property=\"og:description\" content=\"Truy\u1ec1n nhi\u1ec7t trong ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m gi\u00fap duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 h\u01b0\u01a1ng v\u1ecb. T\u00ecm hi\u1ec3u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t quan tr\u1ecdng trong ng\u00e0nh th\u1ef1c ph\u1ea9m.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.thermal-engineering.org\/vi\/su-truyen-nhiet-trong-che-bien-thuc-pham\/\" \/>\n<meta property=\"og:site_name\" content=\"Thermal Engineering\" \/>\n<meta property=\"article:published_time\" content=\"2024-11-26T19:17:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/su_truyen_nhiet_trong_che_bien_thuc_pham.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\/su-truyen-nhiet-trong-che-bien-thuc-pham\/#primaryimage\",\"inLanguage\":\"vi-VN\",\"url\":\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/su_truyen_nhiet_trong_che_bien_thuc_pham.png\",\"width\":1000,\"height\":1000,\"caption\":\"S\\u1ef1 truy\\u1ec1n nhi\\u1ec7t trong ch\\u1ebf bi\\u1ebfn th\\u1ef1c ph\\u1ea9m\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.thermal-engineering.org\/vi\/su-truyen-nhiet-trong-che-bien-thuc-pham\/#webpage\",\"url\":\"https:\/\/www.thermal-engineering.org\/vi\/su-truyen-nhiet-trong-che-bien-thuc-pham\/\",\"name\":\"S\\u1ef1 truy\\u1ec1n nhi\\u1ec7t trong ch\\u1ebf bi\\u1ebfn th\\u1ef1c ph\\u1ea9m\",\"isPartOf\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/vi\/su-truyen-nhiet-trong-che-bien-thuc-pham\/#primaryimage\"},\"datePublished\":\"2024-11-26T19:17:11+00:00\",\"dateModified\":\"2024-11-26T19:17:11+00:00\",\"author\":{\"@id\":\"https:\/\/www.thermal-engineering.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb\"},\"description\":\"Truy\\u1ec1n nhi\\u1ec7t trong ch\\u1ebf bi\\u1ebfn th\\u1ef1c ph\\u1ea9m gi\\u00fap duy tr\\u00ec ch\\u1ea5t l\\u01b0\\u1ee3ng v\\u00e0 h\\u01b0\\u01a1ng v\\u1ecb. T\\u00ecm hi\\u1ec3u c\\u00e1c ph\\u01b0\\u01a1ng ph\\u00e1p truy\\u1ec1n nhi\\u1ec7t quan tr\\u1ecdng trong ng\\u00e0nh th\\u1ef1c ph\\u1ea9m.\",\"inLanguage\":\"vi-VN\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.thermal-engineering.org\/vi\/su-truyen-nhiet-trong-che-bien-thuc-pham\/\"]}]},{\"@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\/699637"}],"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=699637"}],"version-history":[{"count":0,"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/posts\/699637\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/media?parent=699637"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/categories?post=699637"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thermal-engineering.org\/vi\/wp-json\/wp\/v2\/tags?post=699637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}