{"id":684320,"date":"2024-07-29T01:14:43","date_gmt":"2024-07-29T00:14:43","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=684320"},"modified":"2024-07-29T01:14:43","modified_gmt":"2024-07-29T00:14:43","slug":"6-loai-chuyen-nhiet-khi-nong-chay-trong-san-xuat","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/6-loai-chuyen-nhiet-khi-nong-chay-trong-san-xuat\/","title":{"rendered":"6 Lo\u1ea1i Chuy\u1ec3n Nhi\u1ec7t Khi N\u00f3ng Ch\u1ea3y Trong S\u1ea3n Xu\u1ea5t"},"content":{"rendered":"<p class=\"sidekick\">B\u00e0i vi\u1ebft gi\u1ea3i th\u00edch 6 lo\u1ea1i chuy\u1ec3n nhi\u1ec7t khi n\u00f3ng ch\u1ea3y trong s\u1ea3n xu\u1ea5t, gi\u00fap \u0111\u1ed9c gi\u1ea3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 qu\u00e1 tr\u00ecnh nhi\u1ec7t trong ng\u00e0nh c\u00f4ng nghi\u1ec7p.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/6_loai_chuyen_nhiet_khi_nong_chay_trong_san_xuat.png\" alt=\"6 Lo\u1ea1i Chuy\u1ec3n Nhi\u1ec7t Khi N\u00f3ng Ch\u1ea3y Trong S\u1ea3n Xu\u1ea5t\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>6 Lo\u1ea1i Chuy\u1ec3n Nhi\u1ec7t Khi N\u00f3ng Ch\u1ea3y Trong S\u1ea3n Xu\u1ea5t<\/h2>\n<p>Trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t, chuy\u1ec3n nhi\u1ec7t khi n\u00f3ng ch\u1ea3y \u0111\u00f3ng vai tr\u00f2 v\u00f4 c\u00f9ng quan tr\u1ecdng. Qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng ch\u1ec9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t m\u00e0 c\u00f2n quy\u1ebft \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a s\u1ea3n ph\u1ea9m. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 s\u00e1u lo\u1ea1i chuy\u1ec3n nhi\u1ec7t khi n\u00f3ng ch\u1ea3y ph\u1ed5 bi\u1ebfn trong s\u1ea3n xu\u1ea5t:<\/p>\n<h2>1. D\u1eabn Nhi\u1ec7t<\/h2>\n<p>D\u1eabn nhi\u1ec7t (hay c\u00f2n g\u1ecdi l\u00e0 truy\u1ec1n nhi\u1ec7t) l\u00e0 qu\u00e1 tr\u00ecnh chuy\u1ec3n nhi\u1ec7t t\u1eeb v\u00f9ng c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao sang v\u00f9ng c\u00f3 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p qua c\u00e1c v\u1eadt li\u1ec7u r\u1eafn, l\u1ecfng ho\u1eb7c kh\u00ed. Trong s\u1ea3n xu\u1ea5t, ch\u1ea5t d\u1eabn nhi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o nhi\u1ec7t \u0111\u1ed9 ph\u00e2n b\u1ed1 \u0111\u1ec1u kh\u1eafp v\u1eadt li\u1ec7u.<\/p>\n<ul>\n<li>Ph\u01b0\u01a1ng tr\u00ecnh d\u1eabn nhi\u1ec7t c\u01a1 b\u1ea3n: <br \/> <br \/>\n        \\( Q = k \\cdot A \\cdot \\frac{dT}{dx} \\)<\/p>\n<p>Trong \u0111\u00f3: Q l\u00e0 l\u01b0\u1ee3ng nhi\u1ec7t truy\u1ec1n qua, k l\u00e0 h\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t, A l\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac, v\u00e0 \\( \\frac{dT}{dx} \\) l\u00e0 \u0111\u1ed9 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 tr\u00ean kho\u1ea3ng c\u00e1ch nh\u1ecf dx.<\/p>\n<\/li>\n<\/ul>\n<h2>2. \u0110\u1ed1i L\u01b0u<\/h2>\n<p>\u0110\u1ed1i l\u01b0u l\u00e0 h\u00ecnh th\u1ee9c chuy\u1ec3n nhi\u1ec7t qua ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed do s\u1ef1 di chuy\u1ec3n c\u1ee7a ch\u00ednh c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed \u0111\u00f3. \u0110\u1ed1i l\u01b0u c\u00f3 th\u1ec3 l\u00e0 t\u1ef1 nhi\u00ean ho\u1eb7c c\u01b0\u1ee1ng b\u1ee9c (nh\u01b0 s\u1eed d\u1ee5ng qu\u1ea1t ho\u1eb7c b\u01a1m).<\/p>\n<ul>\n<li>Ph\u01b0\u01a1ng tr\u00ecnh \u0111\u1ed1i l\u01b0u c\u01a1 b\u1ea3n: <br \/>\n        \\( Q = h \\cdot A \\cdot (T_s &#8211; T_{\\infty}) \\)<\/p>\n<p>Trong \u0111\u00f3: h l\u00e0 h\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u, A l\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t, \\( T_s \\) l\u00e0 nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t, v\u00e0 \\( T_{\\infty} \\) l\u00e0 nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh.<\/p>\n<\/li>\n<\/ul>\n<h2>3. B\u1ee9c X\u1ea1<\/h2>\n<p>B\u1ee9c x\u1ea1 nhi\u1ec7t l\u00e0 s\u1ef1 truy\u1ec1n nhi\u1ec7t qua kh\u00f4ng gian d\u01b0\u1edbi d\u1ea1ng tia h\u1ed3ng ngo\u1ea1i m\u00e0 kh\u00f4ng c\u1ea7n ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n qua. T\u1ea5t c\u1ea3 c\u00e1c v\u1eadt c\u00f3 nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec1u ph\u00e1t ra b\u1ee9c x\u1ea1 nhi\u1ec7t.<\/p>\n<ul>\n<li>Ph\u01b0\u01a1ng tr\u00ecnh b\u1ee9c x\u1ea1 c\u01a1 b\u1ea3n: <br \/> <br \/>\n        \\( Q = \\sigma \\cdot A \\cdot (T_s^4 &#8211; T_{\\infty}^4) \\)<\/p>\n<p>Trong \u0111\u00f3: \\( \\sigma \\) l\u00e0 h\u1eb1ng s\u1ed1 Stefan-Boltzmann, A l\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t, \\( T_s \\) l\u00e0 nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t, v\u00e0  \\(T_{\\infty} \\) l\u00e0 nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng.<\/p>\n<\/li>\n<\/ul>\n<h2>4. N\u00f3ng Ch\u1ea3y<\/h2>\n<p>N\u00f3ng ch\u1ea3y l\u00e0 giai \u0111o\u1ea1n chuy\u1ec3n tr\u1ea1ng th\u00e1i t\u1eeb r\u1eafn sang l\u1ecfng c\u1ee7a v\u1eadt li\u1ec7u, c\u1ea7n cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t \u0111\u1ec3 ph\u00e1 v\u1ee1 c\u1ea5u tr\u00fac tinh th\u1ec3 r\u1eafn.<\/p>\n<ul>\n<li>C\u00f4ng th\u1ee9c nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 n\u00f3ng ch\u1ea3y: <br \/>\n        \\( Q = m \\cdot L_f \\)<\/p>\n<p>Trong \u0111\u00f3: Q l\u00e0 l\u01b0\u1ee3ng nhi\u1ec7t, m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt li\u1ec7u, v\u00e0 \\( L_f \\) l\u00e0 nhi\u1ec7t n\u00f3ng ch\u1ea3y ri\u00eang c\u1ee7a ch\u1ea5t.<\/p>\n<\/li>\n<\/ul>\n<h2>5. \u0110\u00f4ng \u0110\u1eb7c<\/h2>\n<p>\u0110\u00f4ng \u0111\u1eb7c l\u00e0 qu\u00e1 tr\u00ecnh chuy\u1ec3n t\u1eeb tr\u1ea1ng th\u00e1i l\u1ecfng sang r\u1eafn. Qu\u00e1 tr\u00ecnh n\u00e0y th\u1ea3i nhi\u1ec7t ra m\u00f4i tr\u01b0\u1eddng.<\/p>\n<ul>\n<li>C\u00f4ng th\u1ee9c nhi\u1ec7t l\u01b0\u1ee3ng th\u1ea3i ra khi \u0111\u00f4ng \u0111\u1eb7c: <br \/>\n        \\( Q = m \\cdot L_f \\)<\/p>\n<p>Trong \u0111\u00f3: Q l\u00e0 l\u01b0\u1ee3ng nhi\u1ec7t th\u1ea3i ra, m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt li\u1ec7u, v\u00e0 \\( L_f \\) l\u00e0 nhi\u1ec7t \u0111\u00f4ng \u0111\u1eb7c ri\u00eang c\u1ee7a ch\u1ea5t.<\/p>\n<\/li>\n<\/ul>\n<h2>6. Bay H\u01a1i<\/h2>\n<p>Bay h\u01a1i l\u00e0 qu\u00e1 tr\u00ecnh chuy\u1ec3n t\u1eeb tr\u1ea1ng th\u00e1i l\u1ecfng sang h\u01a1i. Qu\u00e1 tr\u00ecnh n\u00e0y c\u1ea7n cung c\u1ea5p nhi\u1ec7t l\u01b0\u1ee3ng \u0111\u1ec3 v\u01b0\u1ee3t qua l\u1ef1c li\u00ean k\u1ebft ph\u00e2n t\u1eed ch\u1ea5t l\u1ecfng.<\/p>\n<ul>\n<li>C\u00f4ng th\u1ee9c nhi\u1ec7t l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 bay h\u01a1i: <br \/>\n        \\( Q = m \\cdot L_v \\)<\/p>\n<p>Trong \u0111\u00f3: Q l\u00e0 l\u01b0\u1ee3ng nhi\u1ec7t, m l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt li\u1ec7u, v\u00e0 \\( L_v \\) l\u00e0 nhi\u1ec7t bay h\u01a1i ri\u00eang c\u1ee7a ch\u1ea5t.<\/p>\n<\/li>\n<\/ul>\n<p>Nh\u1eefng hi\u1ec3u bi\u1ebft v\u1ec1 c\u00e1c lo\u1ea1i chuy\u1ec3n nhi\u1ec7t khi n\u00f3ng ch\u1ea3y n\u00e0y gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m trong s\u1ea3n xu\u1ea5t. N\u1eafm v\u1eefng nh\u1eefng nguy\u00ean l\u00fd c\u01a1 b\u1ea3n n\u00e0y, ch\u00fang ta c\u00f3 th\u1ec3 thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng h\u01a1n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u00e0i vi\u1ebft gi\u1ea3i th\u00edch 6 lo\u1ea1i chuy\u1ec3n nhi\u1ec7t khi n\u00f3ng ch\u1ea3y trong s\u1ea3n xu\u1ea5t, gi\u00fap \u0111\u1ed9c gi\u1ea3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 qu\u00e1 tr\u00ecnh nhi\u1ec7t trong ng\u00e0nh 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>6 Lo\u1ea1i Chuy\u1ec3n Nhi\u1ec7t Khi N\u00f3ng Ch\u1ea3y 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