{"id":700407,"date":"2024-11-07T20:56:09","date_gmt":"2024-11-07T19:56:09","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=700407"},"modified":"2024-11-07T20:56:09","modified_gmt":"2024-11-07T19:56:09","slug":"truyen-nhiet-trong-qua-trinh-khu-muoi-nhiet","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-qua-trinh-khu-muoi-nhiet\/","title":{"rendered":"Truy\u1ec1n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh kh\u1eed mu\u1ed1i nhi\u1ec7t"},"content":{"rendered":"<p class=\"sidekick\">Truy\u1ec1n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh kh\u1eed mu\u1ed1i nhi\u1ec7t gi\u00fap hi\u1ec3u c\u00e1ch nhi\u1ec7t \u0111\u1ed9 v\u00e0 n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 lo\u1ea1i b\u1ecf mu\u1ed1i t\u1eeb n\u01b0\u1edbc bi\u1ec3n, c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 cung c\u1ea5p n\u01b0\u1edbc s\u1ea1ch.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/truyen_nhiet_trong_qua_trinh_khu_muoi_nhiet.png\" alt=\"Truy\u1ec1n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh kh\u1eed mu\u1ed1i nhi\u1ec7t\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Truy\u1ec1n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh kh\u1eed mu\u1ed1i nhi\u1ec7t<\/h2>\n<p>Qu\u00e1 tr\u00ecnh kh\u1eed mu\u1ed1i nhi\u1ec7t l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u1ebfn n\u01b0\u1edbc bi\u1ec3n th\u00e0nh n\u01b0\u1edbc ng\u1ecdt. Truy\u1ec1n nhi\u1ec7t \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong c\u00e1c qu\u00e1 tr\u00ecnh kh\u1eed mu\u1ed1i b\u1eb1ng nhi\u1ec7t n\u00e0y. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 kh\u00e1i ni\u1ec7m v\u00e0 nguy\u00ean l\u00fd c\u01a1 b\u1ea3n v\u1ec1 truy\u1ec1n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh kh\u1eed mu\u1ed1i nhi\u1ec7t.<\/p>\n<h2>Nguy\u00ean l\u00fd truy\u1ec1n nhi\u1ec7t<\/h2>\n<p>Truy\u1ec1n nhi\u1ec7t \u0111\u1ec1 c\u1eadp \u0111\u1ebfn s\u1ef1 chuy\u1ec3n \u0111\u1ed5i nhi\u1ec7t n\u0103ng gi\u1eefa c\u00e1c v\u1eadt th\u1ec3 ho\u1eb7c m\u00f4i tr\u01b0\u1eddng. C\u00f3 ba c\u01a1 ch\u1ebf ch\u00ednh c\u1ee7a truy\u1ec1n nhi\u1ec7t: d\u1eabn nhi\u1ec7t, \u0111\u1ed1i l\u01b0u v\u00e0 b\u1ee9c x\u1ea1.<\/p>\n<p><u1><\/p>\n<li>D\u1eabn nhi\u1ec7t: S\u1ef1 truy\u1ec1n n\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t th\u00f4ng qua m\u1ed9t ch\u1ea5t r\u1eafn do s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 b\u00ean trong v\u1eadt ch\u1ea5t. <img src=\"thermal_conduction.jpg\" alt=\"H\u00ecnh minh h\u1ecda d\u1eabn nhi\u1ec7t\"><\/li>\n<li>\u0110\u1ed1i l\u01b0u: S\u1ef1 truy\u1ec1n nhi\u1ec7t qua ch\u1ea5t l\u01b0u (ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed) b\u1eb1ng d\u00f2ng ch\u1ea3y c\u1ee7a ch\u1ea5t l\u01b0u. <img src=\"convection.jpg\" alt=\"H\u00ecnh minh h\u1ecda \u0111\u1ed1i l\u01b0u\"><\/li>\n<li>B\u1ee9c x\u1ea1: Truy\u1ec1n nhi\u1ec7t th\u00f4ng qua s\u1ef1 ph\u00e1t ra c\u00e1c s\u00f3ng ho\u1eb7c h\u1ea1t n\u0103ng l\u01b0\u1ee3ng t\u1eeb b\u1ec1 m\u1eb7t c\u1ee7a v\u1eadt th\u1ec3. <img src=\"radiation.jpg\" alt=\"H\u00ecnh minh h\u1ecda b\u1ee9c x\u1ea1 nhi\u1ec7t\"><\/li>\n<p><\/u1><\/p>\n<h2>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u1eed mu\u1ed1i nhi\u1ec7t<\/h2>\n<p>C\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p kh\u1eed mu\u1ed1i nhi\u1ec7t, nh\u01b0ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t bao g\u1ed3m ch\u01b0ng c\u1ea5t \u0111a t\u1ea7ng (MSF) v\u00e0 ch\u01b0ng c\u1ea5t m\u00e0ng m\u1ecfng (MED).<\/p>\n<p><u1><\/p>\n<li><b>Ch\u01b0ng c\u1ea5t \u0111a t\u1ea7ng (MSF):<\/b> S\u1eed d\u1ee5ng nhi\u1ec7t \u0111\u1ec3 l\u00e0m bay h\u01a1i n\u01b0\u1edbc bi\u1ec3n trong nhi\u1ec1u t\u1ea7ng (b\u01b0\u1edbc), sau \u0111\u00f3 ng\u01b0ng t\u1ee5 h\u01a1i n\u01b0\u1edbc n\u00e0y th\u00e0nh n\u01b0\u1edbc ng\u1ecdt. Qu\u00e1 tr\u00ecnh MSF t\u1eadn d\u1ee5ng s\u1ef1 truy\u1ec1n nhi\u1ec7t qua d\u1eabn nhi\u1ec7t v\u00e0 \u0111\u1ed1i l\u01b0u \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u qu\u1ea3.<br \/>\n  <img src=\"msf.jpg\" alt=\"H\u00ecnh minh h\u1ecda ch\u01b0ng c\u1ea5t \u0111a t\u1ea7ng\"><\/li>\n<li><b>Ch\u01b0ng c\u1ea5t m\u00e0ng m\u1ecfng (MED):<\/b> N\u01b0\u1edbc bi\u1ec3n \u0111\u01b0\u1ee3c l\u00e0m bay h\u01a1i b\u1eb1ng c\u00e1ch cho ch\u1ea3y qua m\u1ed9t lo\u1ea1t c\u00e1c m\u00e0ng m\u1ecfng, n\u01a1i n\u00f3 ti\u1ebfp x\u00fac v\u1edbi b\u1ec1 m\u1eb7t n\u00f3ng. H\u01a1i n\u01b0\u1edbc \u0111\u01b0\u1ee3c ng\u01b0ng t\u1ee5 th\u00e0nh n\u01b0\u1edbc ng\u1ecdt khi g\u1eb7p b\u1ec1 m\u1eb7t l\u1ea1nh. Qu\u00e1 tr\u00ecnh MED ch\u1ee7 y\u1ebfu d\u1ef1a v\u00e0o d\u1eabn nhi\u1ec7t v\u00e0 b\u1ee9c x\u1ea1 \u0111\u1ec3 th\u1ef1c hi\u1ec7n vi\u1ec7c truy\u1ec1n nhi\u1ec7t.<br \/>\n  <img src=\"med.jpg\" alt=\"H\u00ecnh minh h\u1ecda ch\u01b0ng c\u1ea5t m\u00e0ng m\u1ecfng\"><\/li>\n<p><\/u1><\/p>\n<h2>V\u00ed d\u1ee5 v\u1ec1 t\u00ednh to\u00e1n truy\u1ec1n nhi\u1ec7t trong kh\u1eed mu\u1ed1i<\/h2>\n<p>\u0110\u1ec3 t\u00ednh to\u00e1n truy\u1ec1n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh kh\u1eed mu\u1ed1i, ta s\u1eed d\u1ee5ng ph\u01b0\u01a1ng tr\u00ecnh truy\u1ec1n nhi\u1ec7t. V\u00ed d\u1ee5, \u0111\u1ed1i v\u1edbi qu\u00e1 tr\u00ecnh ch\u01b0ng c\u1ea5t, c\u00f4ng th\u1ee9c t\u00ednh l\u01b0\u1ee3ng nhi\u1ec7t c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m bay h\u01a1i m\u1ed9t kh\u1ed1i l\u01b0\u1ee3ng n\u01b0\u1edbc \\( m \\) v\u1edbi nhi\u1ec7t dung ri\u00eang \\( c \\) v\u00e0 s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 \\( \\Delta T \\) l\u00e0:<\/p>\n<p> \\( Q = m * c * \\Delta T \\) <\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><u1><\/p>\n<li><b>Q:<\/b> L\u01b0\u1ee3ng nhi\u1ec7t (Joule)<\/li>\n<li><b>m:<\/b> Kh\u1ed1i l\u01b0\u1ee3ng (kg)<\/li>\n<li><b>c:<\/b> Nhi\u1ec7t dung ri\u00eang (J\/kg*K)<\/li>\n<li><b>\\Delta T:<\/b> S\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 (K)<\/li>\n<p><\/u1><\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Hi\u1ec3u bi\u1ebft v\u1ec1 truy\u1ec1n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh kh\u1eed mu\u1ed1i nhi\u1ec7t gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 gi\u1ea3m thi\u1ec3u n\u0103ng l\u01b0\u1ee3ng ti\u00eau t\u1ed1n. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap ti\u1ebft ki\u1ec7m chi ph\u00ed m\u00e0 c\u00f2n g\u00f3p ph\u1ea7n b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng. S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa l\u00fd thuy\u1ebft v\u00e0 th\u1ef1c ti\u1ec5n v\u1ec1 truy\u1ec1n nhi\u1ec7t l\u00e0 n\u1ec1n t\u1ea3ng quan tr\u1ecdng cho c\u00e1c k\u1ef9 s\u01b0 v\u00e0 nh\u00e0 khoa h\u1ecdc trong l\u0129nh v\u1ef1c n\u00e0y.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Truy\u1ec1n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh kh\u1eed mu\u1ed1i nhi\u1ec7t gi\u00fap hi\u1ec3u c\u00e1ch nhi\u1ec7t \u0111\u1ed9 v\u00e0 n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 lo\u1ea1i b\u1ecf mu\u1ed1i t\u1eeb n\u01b0\u1edbc bi\u1ec3n, c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 cung c\u1ea5p n\u01b0\u1edbc s\u1ea1ch.<\/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\/ 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