{"id":705508,"date":"2024-10-16T00:37:42","date_gmt":"2024-10-15T23:37:42","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=705508"},"modified":"2024-10-16T00:37:42","modified_gmt":"2024-10-15T23:37:42","slug":"bo-trao-doi-nhiet-tam-han-kin-hieu-suat-cau-truc","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/bo-trao-doi-nhiet-tam-han-kin-hieu-suat-cau-truc\/","title":{"rendered":"B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t T\u1ea5m H\u00e0n K\u00edn | Hi\u1ec7u Su\u1ea5t, C\u1ea5u Tr\u00fac"},"content":{"rendered":"<p class=\"sidekick\">B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t t\u1ea5m h\u00e0n k\u00edn: T\u00ecm hi\u1ec3u v\u1ec1 hi\u1ec7u su\u1ea5t, c\u1ea5u tr\u00fac v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t. Gi\u00fap t\u1ed1i \u01b0u h\u00f3a n\u0103ng l\u01b0\u1ee3ng v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/bo_trao_doi_nhiet_tam_han_kin_hieu_suat_cau_truc.png\" alt=\"B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t T\u1ea5m H\u00e0n K\u00edn | Hi\u1ec7u Su\u1ea5t, C\u1ea5u Tr\u00fac\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t T\u1ea5m H\u00e0n K\u00edn | Hi\u1ec7u Su\u1ea5t, C\u1ea5u Tr\u00fac<\/h2>\n<p><strong>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t t\u1ea5m h\u00e0n k\u00edn<\/strong> l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p th\u00f4ng minh v\u00e0 hi\u1ec7u qu\u1ea3 trong ng\u00e0nh c\u00f4ng nghi\u1ec7p nhi\u1ec7t, gi\u00fap chuy\u1ec3n \u0111\u1ed5i nhi\u1ec7t gi\u1eefa hai ho\u1eb7c nhi\u1ec1u ch\u1ea5t l\u01b0u m\u00e0 kh\u00f4ng c\u1ea7n ch\u00fang ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp. Lo\u1ea1i b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t n\u00e0y \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1edd v\u00e0o hi\u1ec7u su\u1ea5t cao v\u00e0 thi\u1ebft k\u1ebf nh\u1ecf g\u1ecdn.<\/p>\n<h2>Hi\u1ec7u Su\u1ea5t<\/h2>\n<p>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t t\u1ea5m h\u00e0n k\u00edn c\u00f3 hi\u1ec7u su\u1ea5t cao nh\u1edd v\u00e0o thi\u1ebft k\u1ebf \u0111\u1ed9c \u0111\u00e1o c\u1ee7a ch\u00fang. C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t<\/strong>: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c t\u1ea5m gi\u00fap t\u1ed1i \u0111a h\u00f3a s\u1ef1 trao \u0111\u1ed5i nhi\u1ec7t.<\/li>\n<li><strong>L\u01b0u l\u01b0\u1ee3ng ch\u1ea5t l\u1ecfng<\/strong>: T\u1ec9 su\u1ea5t l\u01b0u l\u01b0\u1ee3ng c\u1ee7a ch\u1ea5t l\u01b0u qua c\u00e1c k\u00eanh t\u1ea5m \u1ea3nh h\u01b0\u1edfng m\u1ea1nh \u0111\u1ebfn hi\u1ec7u su\u1ea5t trao \u0111\u1ed5i nhi\u1ec7t. L\u01b0u l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u1ed3ng \u0111\u1ec1u gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t.<\/li>\n<li><strong>Ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9<\/strong>: Ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 c\u00e0ng l\u1edbn gi\u1eefa c\u00e1c ch\u1ea5t l\u01b0u th\u00ec hi\u1ec7u su\u1ea5t trao \u0111\u1ed5i nhi\u1ec7t c\u00e0ng cao.<\/li>\n<\/ul>\n<p>Hi\u1ec7u su\u1ea5t nhi\u1ec7t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng c\u00f4ng th\u1ee9c hi\u1ec7u su\u1ea5t truy\u1ec1n nhi\u1ec7t:<\/p>\n<p><em>Q = U * A * \u0394T<\/em><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>Q: L\u01b0\u1ee3ng nhi\u1ec7t truy\u1ec1n (W)<\/li>\n<li>U: H\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t (W\/m\u00b2\u00b7K)<\/li>\n<li>A: Di\u1ec7n t\u00edch trao \u0111\u1ed5i nhi\u1ec7t (m\u00b2)<\/li>\n<li>\u0394T: Ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh (K)<\/li>\n<\/ul>\n<h2>C\u1ea5u Tr\u00fac<\/h2>\n<p>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t t\u1ea5m h\u00e0n k\u00edn \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb nhi\u1ec1u t\u1ea5m kim lo\u1ea1i x\u1ebfp ch\u1ed3ng l\u00ean nhau, t\u1ea1o th\u00e0nh c\u00e1c k\u00eanh gi\u1eef ch\u1ea5t l\u01b0u. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh:<\/p>\n<ol>\n<li><strong>T\u1ea5m kim lo\u1ea1i<\/strong>: Nh\u1eefng t\u1ea5m n\u00e0y th\u01b0\u1eddng l\u00e0m t\u1eeb th\u00e9p kh\u00f4ng g\u1ec9 hay ti\u00eau chu\u1ea9n kh\u00e1c c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0103n m\u00f2n cao.<\/li>\n<li><strong>K\u00eanh l\u00e0m m\u00e1t v\u00e0 n\u00f3ng<\/strong>: C\u00e1c k\u00eanh n\u00e0y \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh b\u1edfi kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c t\u1ea5m, cho ph\u00e9p ch\u1ea5t l\u01b0u \u0111i qua v\u00e0 trao \u0111\u1ed5i nhi\u1ec7t.<\/li>\n<li><strong>M\u1ed1i h\u00e0n<\/strong>: C\u00e1c t\u1ea5m \u0111\u01b0\u1ee3c h\u00e0n k\u00edn t\u1ea1i c\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 ch\u1ea5t l\u01b0u r\u00f2 r\u1ec9 gi\u1eefa c\u00e1c k\u00eanh.<\/li>\n<\/ol>\n<p>Thi\u1ebft k\u1ebf t\u1ea5m h\u00e0n k\u00edn gi\u00fap t\u1ed1i \u01b0u h\u00f3a di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac v\u00e0 t\u0103ng c\u01b0\u1eddng qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t. C\u00e1c t\u1ea5m kim lo\u1ea1i th\u01b0\u1eddng c\u00f3 b\u1ec1 m\u1eb7t g\u1ee3n s\u00f3ng ho\u1eb7c c\u00f3 d\u1ea1ng hoa v\u0103n \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng hi\u1ec7u su\u1ea5t truy\u1ec1n nhi\u1ec7t v\u00e0 t\u1ea1o ra r\u1ed1i lo\u1ea1n d\u00f2ng ch\u1ea3y (turbulent flow), h\u1ea1n ch\u1ebf s\u1ef1 t\u00edch t\u1ee5 c\u1eb7n b\u1ea9n.<\/p>\n<h2>\u1ee8ng D\u1ee5ng Th\u1ef1c T\u1ebf<\/h2>\n<p>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t t\u1ea5m h\u00e0n k\u00edn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0:<\/p>\n<ul>\n<li><strong>C\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m v\u00e0 \u0111\u1ed3 u\u1ed1ng<\/strong>: S\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh ti\u1ec7t tr\u00f9ng v\u00e0 l\u00e0m l\u1ea1nh nhanh.<\/li>\n<li><strong>Ng\u00e0nh h\u00f3a ch\u1ea5t<\/strong>: D\u00f9ng \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i nhi\u1ec7t trong qu\u00e1 tr\u00ecnh pha tr\u1ed9n v\u00e0 ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc.<\/li>\n<li><strong>Ng\u00e0nh d\u1ea7u kh\u00ed<\/strong>: \u1ee8ng d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t v\u00e0 gia nhi\u1ec7t d\u1ea7u.<\/li>\n<li><strong>C\u00f4ng nghi\u1ec7p HVAC<\/strong>: D\u00f9ng trong h\u1ec7 th\u1ed1ng s\u01b0\u1edfi \u1ea5m, th\u00f4ng gi\u00f3 v\u00e0 \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed.<\/li>\n<\/ul>\n<p>V\u1edbi c\u1ea5u tr\u00fac ch\u1eafn ch\u1eafn, hi\u1ec7u su\u1ea5t cao v\u00e0 kh\u1ea3 n\u0103ng t\u00f9y ch\u1ec9nh linh ho\u1ea1t, b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t t\u1ea5m h\u00e0n k\u00edn kh\u00f4ng ng\u1eebng kh\u1eb3ng \u0111\u1ecbnh vai tr\u00f2 quan tr\u1ecdng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t t\u1ea5m h\u00e0n k\u00edn: T\u00ecm hi\u1ec3u v\u1ec1 hi\u1ec7u su\u1ea5t, c\u1ea5u tr\u00fac v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t. Gi\u00fap t\u1ed1i \u01b0u h\u00f3a n\u0103ng l\u01b0\u1ee3ng v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed.<\/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>B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t T\u1ea5m H\u00e0n K\u00edn | Hi\u1ec7u Su\u1ea5t, C\u1ea5u Tr\u00fac<\/title>\n<meta name=\"description\" content=\"B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t t\u1ea5m h\u00e0n k\u00edn: T\u00ecm hi\u1ec3u v\u1ec1 hi\u1ec7u su\u1ea5t, c\u1ea5u tr\u00fac v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf trong c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t. 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