{"id":709762,"date":"2024-10-03T09:38:21","date_gmt":"2024-10-03T08:38:21","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=709762"},"modified":"2024-10-03T09:38:21","modified_gmt":"2024-10-03T08:38:21","slug":"chuyen-dong-cuong-buc-trong-truyen-nhiet-la-gi","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/chuyen-dong-cuong-buc-trong-truyen-nhiet-la-gi\/","title":{"rendered":"Chuy\u1ec3n \u0110\u1ed9ng C\u01b0\u1ee1ng B\u1ee9c Trong Truy\u1ec1n Nhi\u1ec7t L\u00e0 G\u00ec?"},"content":{"rendered":"<p class=\"sidekick\">Chuy\u1ec3n \u0110\u1ed9ng C\u01b0\u1ee1ng B\u1ee9c Trong Truy\u1ec1n Nhi\u1ec7t l\u00e0 qu\u00e1 tr\u00ecnh nhi\u1ec7t di chuy\u1ec3n do \u00e1p d\u1ee5ng l\u1ef1c t\u1eeb b\u00ean ngo\u00e0i, gi\u00fap t\u0103ng hi\u1ec7u qu\u1ea3 trong c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/chuyen_dong_cuong_buc_trong_truyen_nhiet_la_gi.png\" alt=\"Chuy\u1ec3n \u0110\u1ed9ng C\u01b0\u1ee1ng B\u1ee9c Trong Truy\u1ec1n Nhi\u1ec7t L\u00e0 G\u00ec?\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Chuy\u1ec3n \u0110\u1ed9ng C\u01b0\u1ee1ng B\u1ee9c Trong Truy\u1ec1n Nhi\u1ec7t L\u00e0 G\u00ec?<\/h2>\n<p>Trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t, chuy\u1ec3n \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c (forced convection) l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t. \u0110\u00e2y l\u00e0 qu\u00e1 tr\u00ecnh m\u00e0 ch\u1ea5t l\u1ecfng (ch\u1eb3ng h\u1ea1n nh\u01b0 kh\u00f4ng kh\u00ed ho\u1eb7c n\u01b0\u1edbc) \u0111\u01b0\u1ee3c \u00e9p bu\u1ed9c di chuy\u1ec3n qua m\u1ed9t b\u1ec1 m\u1eb7t \u0111\u1ec3 t\u0103ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n nhi\u1ec7t t\u1eeb ho\u1eb7c \u0111\u1ebfn b\u1ec1 m\u1eb7t \u0111\u00f3.<\/p>\n<h2>C\u00e1ch Chuy\u1ec3n \u0110\u1ed9ng C\u01b0\u1ee1ng B\u1ee9c Ho\u1ea1t \u0110\u1ed9ng<\/h2>\n<ul>\n<li>Trong chuy\u1ec3n \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c, ch\u1ea5t l\u1ecfng \u0111\u01b0\u1ee3c di chuy\u1ec3n th\u00f4ng qua c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 qu\u1ea1t, b\u01a1m, ho\u1eb7c c\u00e1c c\u01a1 ch\u1ebf kh\u00e1c, thay v\u00ec l\u01b0u th\u00f4ng t\u1ef1 nhi\u00ean b\u1eb1ng ch\u00ednh n\u00f3.<\/li>\n<li>Qu\u00e1 tr\u00ecnh n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t ho\u1eb7c s\u01b0\u1edfi \u1ea5m \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t truy\u1ec1n nhi\u1ec7t.<\/li>\n<\/ul>\n<h2>C\u00e1c Ph\u01b0\u01a1ng Tr\u00ecnh Li\u00ean Quan<\/h2>\n<p>M\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng tr\u00ecnh quan tr\u1ecdng nh\u1ea5t trong chuy\u1ec3n \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh Newton v\u1ec1 l\u00e0m m\u00e1t, \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n nh\u01b0 sau:<\/p>\n<p><em>Q<\/em> = <em>h<\/em> * <em>A<\/em> * (<em>T<sub>s<\/sub><\/em> &#8211; <em>T<sub>\u221e<\/sub><\/em>)<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><em>Q<\/em>: Nhi\u1ec7t l\u01b0\u1ee3ng truy\u1ec1n qua \u0111\u01a1n v\u1ecb th\u1eddi gian (W)<\/li>\n<li><em>h<\/em>: H\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t c\u01b0\u1ee1ng b\u1ee9c (W\/m<sup>2<\/sup>K)<\/li>\n<li><em>A<\/em>: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t truy\u1ec1n nhi\u1ec7t (m<sup>2<\/sup>)<\/li>\n<li><em>T<sub>s<\/sub><\/em>: Nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t (K ho\u1eb7c \u00b0C)<\/li>\n<li><em>T<sub>\u221e<\/sub><\/em>: Nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u1ea5t l\u1ecfng kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng (K ho\u1eb7c \u00b0C)<\/li>\n<\/ul>\n<h2>Th\u00ed D\u1ee5 V\u1ec1 \u1ee8ng D\u1ee5ng<\/h2>\n<ol>\n<li><strong>L\u00e0m m\u00e1t \u0111\u1ed9ng c\u01a1:<\/strong> S\u1eed d\u1ee5ng qu\u1ea1t \u0111\u1ec3 th\u1ed5i gi\u00f3 qua b\u1ec1 m\u1eb7t \u0111\u1ed9ng c\u01a1, gi\u00fap t\u1ea3n nhi\u1ec7t nhanh ch\u00f3ng.<\/li>\n<li><strong>\u0110i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed:<\/strong> M\u00e1y n\u00e9n v\u00e0 qu\u1ea1t gi\u00fap c\u01b0\u1ee1ng b\u1ee9c kh\u00f4ng kh\u00ed l\u1ea1nh ho\u1eb7c n\u00f3ng l\u01b0u th\u00f4ng qua kh\u00f4ng gian c\u1ea7n \u0111i\u1ec1u h\u00f2a.<\/li>\n<li><strong>L\u00e0m m\u00e1t \u0111i\u1ec7n t\u1eed:<\/strong> Qu\u1ea1t t\u1ea3n nhi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m m\u00e1t c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed nh\u01b0 CPU trong m\u00e1y t\u00ednh.<\/li>\n<\/ol>\n<h2>L\u1ee3i \u00cdch C\u1ee7a Chuy\u1ec3n \u0110\u1ed9ng C\u01b0\u1ee1ng B\u1ee9c<\/h2>\n<ul>\n<li>T\u0103ng t\u1ed1c \u0111\u1ed9 truy\u1ec1n nhi\u1ec7t, gi\u00fap hi\u1ec7u qu\u1ea3 h\u01a1n so v\u1edbi truy\u1ec1n nhi\u1ec7t t\u1ef1 nhi\u00ean.<\/li>\n<li>Khi\u1ebfn h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t ho\u1eb7c s\u01b0\u1edfi \u1ea5m ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 h\u01a1n, ti\u00eau th\u1ee5 \u00edt n\u0103ng l\u01b0\u1ee3ng h\u01a1n.<\/li>\n<li>Cho ph\u00e9p \u0111i\u1ec1u khi\u1ec3n ch\u00ednh x\u00e1c nhi\u1ec7t \u0111\u1ed9 c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb v\u00e0 m\u00f4i tr\u01b0\u1eddng.<\/li>\n<\/ul>\n<p>Hi\u1ec3u r\u00f5 v\u1ec1 chuy\u1ec3n \u0111\u1ed9ng c\u01b0\u1ee1ng b\u1ee9c v\u00e0 c\u00e1ch th\u1ee9c n\u00f3 ho\u1ea1t \u0111\u1ed9ng s\u1ebd gi\u00fap b\u1ea1n \u00e1p d\u1ee5ng ki\u1ebfn th\u1ee9c n\u00e0y v\u00e0o th\u1ef1c t\u1ebf, t\u1eeb vi\u1ec7c thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t, \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, \u0111\u1ebfn qu\u1ea3n l\u00fd nhi\u1ec7t \u0111\u1ed9 trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 \u0111i\u1ec7n t\u1eed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Chuy\u1ec3n \u0110\u1ed9ng C\u01b0\u1ee1ng B\u1ee9c Trong Truy\u1ec1n Nhi\u1ec7t l\u00e0 qu\u00e1 tr\u00ecnh nhi\u1ec7t di chuy\u1ec3n do \u00e1p d\u1ee5ng l\u1ef1c t\u1eeb b\u00ean ngo\u00e0i, gi\u00fap t\u0103ng hi\u1ec7u qu\u1ea3 trong c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t.<\/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>Chuy\u1ec3n \u0110\u1ed9ng C\u01b0\u1ee1ng B\u1ee9c Trong Truy\u1ec1n Nhi\u1ec7t L\u00e0 G\u00ec?<\/title>\n<meta name=\"description\" content=\"Chuy\u1ec3n \u0110\u1ed9ng C\u01b0\u1ee1ng B\u1ee9c Trong Truy\u1ec1n Nhi\u1ec7t l\u00e0 qu\u00e1 tr\u00ecnh nhi\u1ec7t di chuy\u1ec3n do \u00e1p d\u1ee5ng l\u1ef1c t\u1eeb b\u00ean ngo\u00e0i, gi\u00fap t\u0103ng hi\u1ec7u qu\u1ea3 trong c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t.\" \/>\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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