{"id":699347,"date":"2024-11-17T12:46:58","date_gmt":"2024-11-17T11:46:58","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=699347"},"modified":"2024-11-17T12:46:58","modified_gmt":"2024-11-17T11:46:58","slug":"truyen-nhiet-trong-lo-phan-ung-sinh-hoc","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-lo-phan-ung-sinh-hoc\/","title":{"rendered":"Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng sinh h\u1ecdc"},"content":{"rendered":"<p class=\"sidekick\">Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng sinh h\u1ecdc: t\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t truy\u1ec1n qua c\u00e1c th\u00e0nh ph\u1ea7n v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn hi\u1ec7u su\u1ea5t ph\u1ea3n \u1ee9ng sinh h\u1ecdc.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/truyen_nhiet_trong_lo_phan_ung_sinh_hoc.png\" alt=\"Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng sinh h\u1ecdc\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Truy\u1ec1n Nhi\u1ec7t Trong L\u00f2 Ph\u1ea3n \u1ee8ng Sinh H\u1ecdc<\/h2>\n<p>Truy\u1ec1n nhi\u1ec7t l\u00e0 m\u1ed9t kh\u00eda c\u1ea1nh quan tr\u1ecdng trong thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh l\u00f2 ph\u1ea3n \u1ee9ng sinh h\u1ecdc. Nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng sinh h\u1ecdc v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m sinh h\u1ecdc. V\u00ec v\u1eady, hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c c\u01a1 ch\u1ebf truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng sinh h\u1ecdc l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n<h2>C\u00e1c C\u01a1 Ch\u1ebf Truy\u1ec1n Nhi\u1ec7t<\/h2>\n<ul>\n<li><u>Truy\u1ec1n nhi\u1ec7t d\u1eabn:<\/u> \u0110\u00e2y l\u00e0 qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t qua v\u1eadt li\u1ec7u r\u1eafn, t\u1eeb khu v\u1ef1c c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao sang khu v\u1ef1c c\u00f3 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n. Ph\u01b0\u01a1ng tr\u00ecnh ph\u1ed5 bi\u1ebfn cho truy\u1ec1n nhi\u1ec7t d\u1eabn l\u00e0 <em>Fourier&#8217;s Law<\/em>, th\u1ec3 hi\u1ec7n b\u1eb1ng:\n<p>\\( q = -k \\cdot A \\cdot \\frac{dT}{dx} \\)<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>q: d\u00f2ng nhi\u1ec7t (W)<\/li>\n<li>k: h\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u (W\/m\u00b7K)<\/li>\n<li>A: di\u1ec7n t\u00edch m\u1eb7t c\u1eaft ngang (m<sup>2<\/sup>)<\/li>\n<li>dT\/dx: gradient nhi\u1ec7t \u0111\u1ed9 theo h\u01b0\u1edbng truy\u1ec1n d\u1eabn<\/li>\n<\/ul>\n<\/li>\n<li><u>Truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u:<\/u> \u0110\u00e2y l\u00e0 qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t gi\u1eefa b\u1ec1 m\u1eb7t r\u1eafn v\u00e0 ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed chuy\u1ec3n \u0111\u1ed9ng. Ph\u01b0\u01a1ng tr\u00ecnh Newton cho truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u l\u00e0:\n<p>\\( q = h \\cdot A \\cdot (T_s &#8211; T_\\infty) \\)<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>q: d\u00f2ng nhi\u1ec7t (W)<\/li>\n<li>h: h\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u (W\/m<sup>2<\/sup>\u00b7K)<\/li>\n<li>A: di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t (m<sup>2<\/sup>)<\/li>\n<li>T<sub>s<\/sub>: nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t (\u00b0C)<\/li>\n<li>T<sub>\u221e<\/sub>: nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed (\u00b0C)<\/li>\n<\/ul>\n<\/li>\n<li><u>Truy\u1ec1n nhi\u1ec7t b\u1ee9c x\u1ea1:<\/u> \u0110\u00e2y l\u00e0 qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t th\u00f4ng qua b\u1ee9c x\u1ea1 \u0111i\u1ec7n t\u1eeb. Ph\u01b0\u01a1ng tr\u00ecnh Stefan-Boltzmann m\u00f4 t\u1ea3 qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0:\n<p>\\( q = \\epsilon \\cdot \\sigma \\cdot A \\cdot (T_s^4 &#8211; T_{\\infty}^4) \\)<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>q: d\u00f2ng nhi\u1ec7t (W)<\/li>\n<li>\\(\\epsilon\\): h\u1ec7 s\u1ed1 ph\u00e1t x\u1ea1 c\u1ee7a b\u1ec1 m\u1eb7t<\/li>\n<li>\\(\\sigma\\): h\u1eb1ng s\u1ed1 Stefan-Boltzmann (\\(5.67 \\times 10^{-8} W\/m^2 \\cdot K^4\\))<\/li>\n<li>A: di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t (m<sup>2<\/sup>)<\/li>\n<li>T<sub>s<\/sub>: nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t (K)<\/li>\n<li>T<sub>\u221e<\/sub>: nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh (K)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>\u1ee8ng D\u1ee5ng Trong L\u00f2 Ph\u1ea3n \u1ee8ng Sinh H\u1ecdc<\/h2>\n<p>Trong l\u00f2 ph\u1ea3n \u1ee9ng sinh h\u1ecdc, vi\u1ec7c duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 optimal l\u00e0 r\u1ea5t quan tr\u1ecdng. \u0110\u1ec3 l\u00e0m \u0111i\u1ec1u n\u00e0y, c\u00e1c k\u1ef9 s\u01b0 ph\u1ea3i t\u00ednh to\u00e1n v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng truy\u1ec1n nhi\u1ec7t hi\u1ec7u qu\u1ea3:<\/p>\n<ol>\n<li><u>H\u1ec7 Th\u1ed1ng Gia Nhi\u1ec7t:<\/u> Bao g\u1ed3m c\u00e1c b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t \u0111\u1ec3 t\u0103ng nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng ph\u1ea3n \u1ee9ng. C\u00e1c b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng n\u01b0\u1edbc n\u00f3ng, h\u01a1i n\u01b0\u1edbc ho\u1eb7c \u0111i\u1ec7n \u0111\u1ec3 gia nhi\u1ec7t.<\/li>\n<li><u>H\u1ec7 Th\u1ed1ng L\u00e0m M\u00e1t:<\/u> D\u00f9ng \u0111\u1ec3 duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 trong kho\u1ea3ng ph\u00f9 h\u1ee3p. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u00e0m m\u00e1t ph\u1ed5 bi\u1ebfn bao g\u1ed3m s\u1eed d\u1ee5ng n\u01b0\u1edbc l\u1ea1nh, kh\u00f4ng kh\u00ed l\u00e0m m\u00e1t ho\u1eb7c c\u00e1c ch\u1ea5t l\u00e0m l\u1ea1nh.<\/li>\n<li><u>C\u1ea3m Bi\u1ebfn Nhi\u1ec7t:<\/u> \u0110\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u0111\u1ec3 gi\u00e1m s\u00e1t v\u00e0 \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9 trong l\u00f2 ph\u1ea3n \u1ee9ng. C\u00e1c c\u1ea3m bi\u1ebfn n\u00e0y gi\u00fap \u0111i\u1ec1u ch\u1ec9nh k\u1ecbp th\u1eddi b\u1ea5t k\u1ef3 bi\u1ebfn \u0111\u1ed9ng nhi\u1ec7t n\u00e0o.<\/li>\n<\/ol>\n<p>T\u00f3m l\u1ea1i, vi\u1ec7c hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 c\u00e1c c\u01a1 ch\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng sinh h\u1ecdc \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m. H\u1ec7 th\u1ed1ng truy\u1ec1n nhi\u1ec7t hi\u1ec7u qu\u1ea3 gi\u00fap duy tr\u00ec \u0111i\u1ec1u ki\u1ec7n ph\u1ea3n \u1ee9ng \u1ed5n \u0111\u1ecbnh, t\u1eeb \u0111\u00f3 n\u00e2ng cao n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t sinh h\u1ecdc.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Truy\u1ec1n nhi\u1ec7t trong l\u00f2 ph\u1ea3n \u1ee9ng sinh h\u1ecdc: t\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t truy\u1ec1n qua c\u00e1c th\u00e0nh ph\u1ea7n v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn hi\u1ec7u su\u1ea5t ph\u1ea3n \u1ee9ng sinh h\u1ecdc.<\/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 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