{"id":678856,"date":"2024-11-22T05:50:18","date_gmt":"2024-11-22T04:50:18","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=678856"},"modified":"2024-11-22T05:50:18","modified_gmt":"2024-11-22T04:50:18","slug":"nguyen-ly-nhiet-dong-luc-hoc-trong-viec-nau-an-sous-vide-la-gi","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/nguyen-ly-nhiet-dong-luc-hoc-trong-viec-nau-an-sous-vide-la-gi\/","title":{"rendered":"Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc trong vi\u1ec7c n\u1ea5u \u0103n sous vide l\u00e0 g\u00ec"},"content":{"rendered":"<p class=\"sidekick\">Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc trong vi\u1ec7c n\u1ea5u \u0103n sous vide gi\u1ea3i th\u00edch c\u00e1ch ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 ch\u00ednh x\u00e1c gi\u00fap th\u1ef1c ph\u1ea9m ch\u00edn \u0111\u1ec1u v\u00e0 gi\u1eef h\u01b0\u01a1ng v\u1ecb t\u1ef1 nhi\u00ean.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/nguyen_ly_nhiet_dong_luc_hoc_trong_viec_nau_an_sous_vide_la_gi.png\" alt=\"Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc trong vi\u1ec7c n\u1ea5u \u0103n sous vide l\u00e0 g\u00ec\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc trong vi\u1ec7c n\u1ea5u \u0103n sous vide l\u00e0 g\u00ec?<\/h2>\n<p>Sous vide l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p n\u1ea5u \u0103n ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn, trong \u0111\u00f3 th\u1ef1c ph\u1ea9m \u0111\u01b0\u1ee3c n\u1ea5u \u1edf m\u1ed9t nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh trong th\u1eddi gian d\u00e0i, th\u01b0\u1eddng l\u00e0 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng n\u01b0\u1edbc n\u00f3ng. \u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, ch\u00fang ta c\u1ea7n t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc li\u00ean quan.<\/p>\n<h2>Nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc v\u00e0 s\u1ef1 truy\u1ec1n nhi\u1ec7t<\/h2>\n<p>Nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc l\u00e0 m\u1ed9t ng\u00e0nh khoa h\u1ecdc nghi\u00ean c\u1ee9u v\u1ec1 s\u1ef1 chuy\u1ec3n h\u00f3a v\u00e0 truy\u1ec1n nhi\u1ec7t. Trong vi\u1ec7c n\u1ea5u \u0103n sous vide, nguy\u00ean l\u00fd ch\u00ednh c\u1ee7a nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng l\u00e0 s\u1ef1 truy\u1ec1n nhi\u1ec7t t\u1eeb n\u01b0\u1edbc \u0111\u1ebfn th\u1ef1c ph\u1ea9m.<\/p>\n<ul>\n<li><b>\u0110\u1ed1i l\u01b0u:<\/b> N\u01b0\u1edbc n\u00f3ng truy\u1ec1n nhi\u1ec7t \u0111\u1ebfn th\u1ef1c ph\u1ea9m th\u00f4ng qua chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc.<\/li>\n<li><b>D\u1eabn nhi\u1ec7t:<\/b> Th\u1ef1c ph\u1ea9m h\u1ea5p th\u1ee5 nhi\u1ec7t t\u1eeb n\u01b0\u1edbc tr\u1ef1c ti\u1ebfp qua b\u1ec1 m\u1eb7t c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n<p>C\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 s\u1ef1 truy\u1ec1n nhi\u1ec7t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 b\u1eb1ng ph\u01b0\u01a1ng tr\u00ecnh Fourier:<\/p>\n<p>Q = -k * A * \\frac{dT}{dx}<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>Q: Nhi\u1ec7t l\u01b0\u1ee3ng truy\u1ec1n qua m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian (W)<\/li>\n<li>k: H\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t (W\/m*K)<\/li>\n<li>A: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac (m\u00b2)<\/li>\n<li>\\frac{dT}{dx}: \u0110\u1ed9 d\u1ed1c nhi\u1ec7t \u0111\u1ed9 (K\/m)<\/li>\n<\/ul>\n<h2>L\u00fd do nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh<\/h2>\n<p>M\u1ed9t \u0111i\u1ec3m quan tr\u1ecdng c\u1ee7a sous vide l\u00e0 n\u1ea5u \u0103n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh. Vi\u1ec7c n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap tr\u00e1nh vi\u1ec7c n\u1ea5u qu\u00e1 ch\u00edn m\u00e0 c\u00f2n duy tr\u00ec h\u01b0\u01a1ng v\u1ecb v\u00e0 k\u1ebft c\u1ea5u t\u1ef1 nhi\u00ean c\u1ee7a th\u1ef1c ph\u1ea9m.<\/p>\n<ul>\n<li><b>B\u1ea3o t\u1ed3n dinh d\u01b0\u1ee1ng:<\/b> Nhi\u1ec7t \u0111\u1ed9 th\u1ea5p gi\u00fap b\u1ea3o qu\u1ea3n c\u00e1c ch\u1ea5t dinh d\u01b0\u1ee1ng m\u00e0 kh\u00f4ng b\u1ecb ph\u00e1 h\u1ee7y nh\u01b0 trong c\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u1ea5u \u0103n nhi\u1ec7t \u0111\u1ed9 cao.<\/li>\n<li><b>\u0110\u1ed3ng nh\u1ea5t:<\/b> N\u1ec1n nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh \u0111\u1ea3m b\u1ea3o th\u1ef1c ph\u1ea9m \u0111\u01b0\u1ee3c n\u1ea5u ch\u00edn \u0111\u1ed3ng \u0111\u1ec1u.<\/li>\n<\/ul>\n<h2>Nguy\u00ean l\u00fd th\u1ee9 nh\u1ea5t v\u00e0 th\u1ee9 hai c\u1ee7a nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc<\/h2>\n<p>B\u00e2y gi\u1edd, ch\u00fang ta h\u00e3y xem x\u00e9t hai nguy\u00ean l\u00fd quan tr\u1ecdng trong nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc:<\/p>\n<ol>\n<li><b>Nguy\u00ean l\u00fd th\u1ee9 nh\u1ea5t:<\/b> N\u0103ng l\u01b0\u1ee3ng kh\u00f4ng th\u1ec3 t\u1ef1 h\u00ecnh th\u00e0nh ho\u1eb7c t\u1ef1 m\u1ea5t \u0111i m\u00e0 ch\u1ec9 c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i t\u1eeb d\u1ea1ng n\u00e0y sang d\u1ea1ng kh\u00e1c. Trong sous vide, n\u0103ng l\u01b0\u1ee3ng d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t t\u1eeb n\u01b0\u1edbc \u0111\u01b0\u1ee3c chuy\u1ec3n v\u00e0o th\u1ef1c ph\u1ea9m.<\/li>\n<li><b>Nguy\u00ean l\u00fd th\u1ee9 hai:<\/b> Nhi\u1ec7t lu\u00f4n di chuy\u1ec3n t\u1eeb v\u1eadt c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n sang v\u1eadt c\u00f3 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n. Trong ph\u01b0\u01a1ng ph\u00e1p sous vide, nhi\u1ec7t \u0111\u1ed9 c\u1ee7a n\u01b0\u1edbc cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 c\u1ee7a th\u1ef1c ph\u1ea9m, do \u0111\u00f3 nhi\u1ec7t l\u01b0\u1ee3ng truy\u1ec1n t\u1eeb n\u01b0\u1edbc v\u00e0o th\u1ef1c ph\u1ea9m.<\/li>\n<\/ol>\n<p>C\u0169ng theo nguy\u00ean l\u00fd th\u1ee9 hai, h\u1ec7 th\u1ed1ng lu\u00f4n c\u00f3 khuynh h\u01b0\u1edbng ti\u1ebfn t\u1edbi tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng nhi\u1ec7t, trong \u0111\u00f3 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a th\u1ef1c ph\u1ea9m v\u00e0 n\u01b0\u1edbc s\u1ebd b\u1eb1ng nhau sau m\u1ed9t th\u1eddi gian \u0111\u1ee7 d\u00e0i.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Sous vide l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a c\u00e1c nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc. B\u1eb1ng c\u00e1ch ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c v\u00e0 hi\u1ec3u v\u1ec1 c\u00e1ch th\u1ee9c nhi\u1ec7t truy\u1ec1n \u0111\u1ebfn th\u1ef1c ph\u1ea9m, ch\u00fang ta c\u00f3 th\u1ec3 n\u1ea5u \u0103n m\u1ed9t c\u00e1ch chu\u1ea9n x\u00e1c v\u00e0 gi\u1eef \u0111\u01b0\u1ee3c h\u01b0\u01a1ng v\u1ecb, c\u0169ng nh\u01b0 ch\u1ea5t dinh d\u01b0\u1ee1ng c\u1ee7a th\u1ef1c ph\u1ea9m.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc trong vi\u1ec7c n\u1ea5u \u0103n sous vide gi\u1ea3i th\u00edch c\u00e1ch ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 ch\u00ednh x\u00e1c gi\u00fap th\u1ef1c ph\u1ea9m ch\u00edn \u0111\u1ec1u v\u00e0 gi\u1eef h\u01b0\u01a1ng v\u1ecb t\u1ef1 nhi\u00ean.<\/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>Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc trong vi\u1ec7c n\u1ea5u \u0103n sous vide l\u00e0 g\u00ec<\/title>\n<meta name=\"description\" content=\"Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc trong vi\u1ec7c n\u1ea5u \u0103n sous vide gi\u1ea3i th\u00edch c\u00e1ch ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 ch\u00ednh x\u00e1c gi\u00fap th\u1ef1c ph\u1ea9m ch\u00edn \u0111\u1ec1u v\u00e0 gi\u1eef h\u01b0\u01a1ng v\u1ecb t\u1ef1 nhi\u00ean.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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