{"id":678150,"date":"2024-07-23T21:48:44","date_gmt":"2024-07-23T20:48:44","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=678150"},"modified":"2024-07-23T21:48:44","modified_gmt":"2024-07-23T20:48:44","slug":"lam-the-nao-canh-tan-nhiet-cai-thien-khoi-tan-nhiet","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/lam-the-nao-canh-tan-nhiet-cai-thien-khoi-tan-nhiet\/","title":{"rendered":"L\u00e0m th\u1ebf n\u00e0o c\u00e1nh t\u1ea3n nhi\u1ec7t c\u1ea3i thi\u1ec7n kh\u1ed1i t\u1ea3n nhi\u1ec7t?"},"content":{"rendered":"<p class=\"sidekick\">C\u00e1nh t\u1ea3n nhi\u1ec7t trong kh\u1ed1i t\u1ea3n nhi\u1ec7t gi\u00fap t\u0103ng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t tho\u00e1t nhi\u1ec7t, c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t l\u00e0m m\u00e1t cho c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed v\u00e0 c\u00f4ng nghi\u1ec7p.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/lam_the_nao_canh_tan_nhiet_cai_thien_khoi_tan_nhiet.png\" alt=\"L\u00e0m th\u1ebf n\u00e0o c\u00e1nh t\u1ea3n nhi\u1ec7t c\u1ea3i thi\u1ec7n kh\u1ed1i t\u1ea3n nhi\u1ec7t?\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>L\u00e0m th\u1ebf n\u00e0o c\u00e1nh t\u1ea3n nhi\u1ec7t c\u1ea3i thi\u1ec7n kh\u1ed1i t\u1ea3n nhi\u1ec7t?<\/h2>\n<p>Trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t, c\u00e1nh t\u1ea3n nhi\u1ec7t \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c n\u00e2ng cao hi\u1ec7u su\u1ea5t c\u1ee7a kh\u1ed1i t\u1ea3n nhi\u1ec7t. Kh\u1ed1i t\u1ea3n nhi\u1ec7t l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb d\u00f9ng \u0111\u1ec3 truy\u1ec1n nhi\u1ec7t t\u1eeb m\u1ed9t v\u1eadt c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng xung quanh, th\u01b0\u1eddng l\u00e0 kh\u00f4ng kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng. Qu\u00e1 tr\u00ecnh t\u1ea3n nhi\u1ec7t hi\u1ec7u qu\u1ea3 gi\u00fap gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 c\u1ee7a v\u1eadt c\u1ea7n l\u00e0m m\u00e1t, b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a n\u00f3.<\/p>\n<h2>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1nh t\u1ea3n nhi\u1ec7t<\/h2>\n<p>C\u00e1nh t\u1ea3n nhi\u1ec7t ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd t\u0103ng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t \u0111\u1ec3 t\u0103ng kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t. Khi di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t l\u1edbn, nhi\u1ec7t c\u00f3 th\u1ec3 truy\u1ec1n \u0111i nhanh h\u01a1n t\u1eeb b\u1ec1 m\u1eb7t n\u00f3ng t\u1edbi m\u00f4i tr\u01b0\u1eddng xung quanh. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 c\u1ee7a b\u1ec1 m\u1eb7t n\u00f3ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<p>C\u00f4ng th\u1ee9c ch\u1ee7 y\u1ebfu li\u00ean quan \u0111\u1ebfn qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t l\u00e0:<\/p>\n<p>Q = h * A * \u0394T<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>Q l\u00e0 l\u01b0\u1ee3ng nhi\u1ec7t \u0111\u01b0\u1ee3c truy\u1ec1n (W)<\/li>\n<li>h l\u00e0 h\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t b\u1ec1 m\u1eb7t (W\/m<sup>2<\/sup>K)<\/li>\n<li>A l\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac (m<sup>2<\/sup>)<\/li>\n<li>\u0394T l\u00e0 s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa b\u1ec1 m\u1eb7t v\u00e0 m\u00f4i tr\u01b0\u1eddng xung quanh (K)<\/li>\n<\/ul>\n<p>R\u00f5 r\u00e0ng, khi di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t <em>A<\/em> t\u0103ng l\u00ean, l\u01b0\u1ee3ng nhi\u1ec7t truy\u1ec1n <em>Q<\/em> s\u1ebd t\u0103ng theo, n\u1ebfu c\u00e1c y\u1ebfu t\u1ed1 c\u00f2n l\u1ea1i kh\u00f4ng \u0111\u1ed5i.<\/p>\n<h2>L\u1ee3i \u00edch c\u1ee7a c\u00e1nh t\u1ea3n nhi\u1ec7t<\/h2>\n<ol>\n<li><strong>T\u0103ng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t:<\/strong> C\u00e1nh t\u1ea3n nhi\u1ec7t c\u00f3 thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t m\u00e0 kh\u00f4ng t\u0103ng qu\u00e1 nhi\u1ec1u kh\u1ed1i l\u01b0\u1ee3ng. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u0103ng kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t c\u1ee7a kh\u1ed1i t\u1ea3n nhi\u1ec7t.<\/li>\n<li><strong>C\u1ea3i thi\u1ec7n lu\u1ed3ng kh\u00f4ng kh\u00ed:<\/strong> C\u00e1c c\u00e1nh t\u1ea3n nhi\u1ec7t \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp \u0111\u1ec3 t\u1ea1o ra c\u00e1c k\u00eanh lu\u1ed3ng kh\u00f4ng kh\u00ed, gi\u00fap kh\u00f4ng kh\u00ed m\u00e1t \u0111i qua d\u1ec5 d\u00e0ng v\u00e0 mang nhi\u1ec7t ra kh\u1ecfi kh\u1ed1i t\u1ea3n nhi\u1ec7t nhanh h\u01a1n.<\/li>\n<li><strong>Ki\u1ec3u d\u00e1ng linh ho\u1ea1t:<\/strong> T\u00f9y thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u c\u1ee5 th\u1ec3, c\u00e1nh t\u1ea3n nhi\u1ec7t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi nhi\u1ec1u h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc kh\u00e1c nhau \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t t\u1ea3n nhi\u1ec7t cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/li>\n<\/ol>\n<h2>\u1ee8ng d\u1ee5ng trong th\u1ef1c t\u1ebf<\/h2>\n<p>C\u00e1nh t\u1ea3n nhi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau. V\u00ed d\u1ee5:<\/p>\n<ul>\n<li>Trong \u0111i\u1ec7n t\u1eed, c\u00e1nh t\u1ea3n nhi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m m\u00e1t c\u00e1c linh ki\u1ec7n nh\u01b0 vi x\u1eed l\u00fd, t\u1ee5 \u0111i\u1ec7n v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn nhi\u1ec7t cao kh\u00e1c.<\/li>\n<li>Trong \u00f4 t\u00f4, c\u00e1nh t\u1ea3n nhi\u1ec7t gi\u00fap l\u00e0m m\u00e1t \u0111\u1ed9ng c\u01a1 v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u su\u1ea5t cao.<\/li>\n<li>Trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed v\u00e0 l\u00e0m m\u00e1t c\u00f4ng nghi\u1ec7p, c\u00e1nh t\u1ea3n nhi\u1ec7t gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t n\u0103ng l\u01b0\u1ee3ng v\u00e0 gi\u1ea3m chi ph\u00ed v\u1eadn h\u00e0nh.<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, c\u00e1nh t\u1ea3n nhi\u1ec7t l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t c\u1ee7a kh\u1ed1i t\u1ea3n nhi\u1ec7t b\u1eb1ng c\u00e1ch t\u0103ng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t v\u00e0 c\u1ea3i thi\u1ec7n lu\u1ed3ng kh\u00f4ng kh\u00ed. Nh\u1edd v\u00e0o c\u00f4ng ngh\u1ec7 v\u00e0 thi\u1ebft k\u1ebf ti\u00ean ti\u1ebfn, c\u00e1nh t\u1ea3n nhi\u1ec7t kh\u00f4ng ch\u1ec9 gi\u00fap l\u00e0m m\u00e1t hi\u1ec7u qu\u1ea3 m\u00e0 c\u00f2n t\u0103ng \u0111\u1ed9 b\u1ec1n v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a c\u1ea3 h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00e1nh t\u1ea3n nhi\u1ec7t trong kh\u1ed1i t\u1ea3n nhi\u1ec7t gi\u00fap t\u0103ng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t tho\u00e1t nhi\u1ec7t, c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t l\u00e0m m\u00e1t cho c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed v\u00e0 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>L\u00e0m 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