{"id":701200,"date":"2024-09-13T12:52:11","date_gmt":"2024-09-13T11:52:11","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=701200"},"modified":"2024-09-13T12:52:11","modified_gmt":"2024-09-13T11:52:11","slug":"bo-trao-doi-nhiet-cac-loai-nguyen-ly-cong-nghiep","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/bo-trao-doi-nhiet-cac-loai-nguyen-ly-cong-nghiep\/","title":{"rendered":"B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t | C\u00e1c Lo\u1ea1i &#038; Nguy\u00ean L\u00fd C\u00f4ng Nghi\u1ec7p"},"content":{"rendered":"<p class=\"sidekick\">B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t | C\u00e1c lo\u1ea1i &#038; nguy\u00ean l\u00fd c\u00f4ng nghi\u1ec7p: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 c\u00e1c lo\u1ea1i b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t ph\u1ed5 bi\u1ebfn v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng trong c\u00f4ng nghi\u1ec7p.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/bo_trao_doi_nhiet_cac_loai_nguyen_ly_cong_nghiep.png\" alt=\"B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t | C\u00e1c Lo\u1ea1i &#038; Nguy\u00ean L\u00fd C\u00f4ng Nghi\u1ec7p\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t | C\u00e1c Lo\u1ea1i &#038; Nguy\u00ean L\u00fd C\u00f4ng Nghi\u1ec7p<\/h2>\n<p>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb chuy\u1ec3n h\u00f3a nhi\u1ec7t t\u1eeb m\u1ed9t ch\u1ea5t l\u1ecfng sang m\u1ed9t ch\u1ea5t kh\u00e1c m\u00e0 kh\u00f4ng l\u00e0m hai d\u00f2ng ch\u1ea5t l\u1ecfng \u0111i qua tr\u1ed9n l\u1eabn v\u1edbi nhau. Ch\u00fang \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 nhi\u1ec7t \u0111i\u1ec7n, h\u00f3a ch\u1ea5t, d\u1ea7u kh\u00ed v\u00e0 c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m. D\u01b0\u1edbi \u0111\u00e2y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u c\u00e1c lo\u1ea1i b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t ph\u1ed5 bi\u1ebfn v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u00fang.<\/p>\n<h2>C\u00e1c Lo\u1ea1i B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t<\/h2>\n<p><u1><\/p>\n<li><b>B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t T\u1ea5m<\/b><\/li>\n<p>Lo\u1ea1i n\u00e0y g\u1ed3m nhi\u1ec1u t\u1ea5m th\u00e9p kh\u00f4ng g\u1ec9 x\u1ebfp ch\u1ed3ng l\u00ean nhau t\u1ea1o ra m\u1ed9t lo\u1ea1t c\u00e1c k\u00eanh nh\u1ecf cho ch\u1ea5t l\u1ecfng ch\u1ea3y qua. Nhi\u1ec7t t\u1eeb m\u1ed7i d\u00f2ng ch\u1ea5t l\u1ecfng \u0111\u01b0\u1ee3c chuy\u1ec3n qua t\u1ea5m, kh\u00f4ng c\u00f3 s\u1ef1 tr\u1ed9n l\u1eabn gi\u1eefa c\u00e1c d\u00f2ng ch\u1ea5t l\u1ecfng.<\/p>\n<li><b>B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t \u1ed0ng L\u1ed3ng<\/b><\/li>\n<p>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t n\u00e0y s\u1eed d\u1ee5ng m\u1ed9t \u1ed1ng b\u00ean trong m\u1ed9t \u1ed1ng kh\u00e1c. Ch\u1ea5t l\u1ecfng n\u00f3ng \u0111i qua \u1ed1ng b\u00ean trong, trong khi ch\u1ea5t l\u1ecfng l\u1ea1nh \u0111i qua kho\u1ea3ng kh\u00f4ng gi\u1eefa hai \u1ed1ng, cho ph\u00e9p truy\u1ec1n nhi\u1ec7t.<\/p>\n<li><b>B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t L\u01b0u L\u01b0\u1ee3ng Ngang<\/b><\/li>\n<p>\u0110\u00e2y l\u00e0 lo\u1ea1i b\u1ed1 tr\u00ed theo h\u01b0\u1edbng d\u00f2ng ch\u1ea5t l\u1ecfng ch\u1ea3y ngang qua nhau, nhi\u1ec7t chuy\u1ec3n t\u1eeb d\u00f2ng n\u00f3ng sang d\u00f2ng l\u1ea1nh v\u1edbi h\u01b0\u1edbng ng\u01b0\u1ee3c chi\u1ec1u ho\u1eb7c song song.<\/p>\n<li><b>B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t Ki\u1ec3u \u1ed0ng Ch\u00f9m<\/b><\/li>\n<p>C\u00f3 c\u1ea5u tr\u00fac ph\u1ee9c t\u1ea1p h\u01a1n v\u1edbi nhi\u1ec1u \u1ed1ng nh\u1ecf n\u1eb1m trong m\u1ed9t v\u1ecf b\u1ecdc l\u1edbn. Ch\u1ea5t l\u1ecfng n\u00f3ng ch\u1ea3y qua nh\u1eefng \u1ed1ng nh\u1ecf, c\u00f2n ch\u1ea5t l\u1ecfng l\u1ea1nh \u0111i qua kho\u1ea3ng kh\u00f4ng b\u00ean ngo\u00e0i \u1ed1ng, mang l\u1ea1i kh\u1ea3 n\u0103ng trao \u0111\u1ed5i nhi\u1ec7t hi\u1ec7u qu\u1ea3 cao.<\/p>\n<p><\/u1><\/p>\n<h2>Nguy\u00ean L\u00fd Ho\u1ea1t \u0110\u1ed9ng<\/h2>\n<p>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u01a1 b\u1ea3n c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t l\u00e0 s\u1ef1 truy\u1ec1n nhi\u1ec7t qua m\u1ed9t b\u1ec1 m\u1eb7t ph\u00e2n c\u00e1ch hai ch\u1ea5t l\u1ecfng. Nhi\u1ec7t chuy\u1ec3n t\u1eeb ch\u1ea5t l\u1ecfng c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao sang ch\u1ea5t l\u1ecfng c\u00f3 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p nh\u1edd hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111\u1ed9 ch\u00eanh l\u1ec7ch.<\/p>\n<ol>\n<li>\u0110i\u1ec1u ki\u1ec7n c\u00e2n b\u1eb1ng nhi\u1ec7t: Nhi\u1ec7t truy\u1ec1n t\u1eeb ch\u1ea5t n\u00f3ng \u0111\u1ebfn ch\u1ea5t l\u1ea1nh cho \u0111\u1ebfn khi \u0111\u1ea1t tr\u1ea1ng th\u00e1i c\u00e2n b\u1eb1ng. C\u00f4ng th\u1ee9c t\u00ednh nhi\u1ec7t truy\u1ec1n:\n<p>Q = mc\\Delta T<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>Q = L\u01b0\u1ee3ng nhi\u1ec7t truy\u1ec1n (J)<\/li>\n<li>m = Kh\u1ed1i l\u01b0\u1ee3ng ch\u1ea5t l\u1ecfng (kg)<\/li>\n<li>c = Nhi\u1ec7t dung ri\u00eang c\u1ee7a ch\u1ea5t l\u1ecfng (J\/kg\u00b0C)<\/li>\n<li>\\(\\Delta T\\) = \u0110\u1ed9 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 (\u00b0C)<\/li>\n<\/ul>\n<\/li>\n<li>Truy\u1ec1n nhi\u1ec7t d\u1eabn qua b\u1ec1 m\u1eb7t: Nhi\u1ec7t d\u1eabn qua b\u1ec1 m\u1eb7t kim lo\u1ea1i ho\u1eb7c c\u00e1c v\u1eadt li\u1ec7u trao \u0111\u1ed5i nhi\u1ec7t kh\u00e1c. \u0110\u1ecbnh lu\u1eadt Fourier c\u00f3 th\u1ec3 m\u00f4 t\u1ea3 qu\u00e1 tr\u00ecnh n\u00e0y b\u1eb1ng c\u00f4ng th\u1ee9c:\n<p> q = -kA\\frac{dT}{dx}<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>q = L\u01b0\u1ee3ng nhi\u1ec7t d\u1eabn truy\u1ec1n (W)<\/li>\n<li>k = H\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t (W\/mK)<\/li>\n<li>A = Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t truy\u1ec1n nhi\u1ec7t (m\u00b2)<\/li>\n<li>\\(\\frac{dT}{dx}\\) = \u0110\u1ed9 d\u1ed1c nhi\u1ec7t \u0111\u1ed9 theo kho\u1ea3ng c\u00e1ch x (\u00b0C\/m)<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c nguy\u00ean l\u00fd v\u00e0 lo\u1ea1i b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t n\u0103ng l\u01b0\u1ee3ng v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t | C\u00e1c lo\u1ea1i &#038; nguy\u00ean l\u00fd c\u00f4ng nghi\u1ec7p: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 c\u00e1c lo\u1ea1i b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t ph\u1ed5 bi\u1ebfn v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng trong 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>B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t | C\u00e1c Lo\u1ea1i &amp; Nguy\u00ean L\u00fd C\u00f4ng Nghi\u1ec7p<\/title>\n<meta name=\"description\" content=\"B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t | C\u00e1c lo\u1ea1i &amp; nguy\u00ean l\u00fd c\u00f4ng nghi\u1ec7p: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 c\u00e1c lo\u1ea1i b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t ph\u1ed5 bi\u1ebfn v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng trong c\u00f4ng nghi\u1ec7p.\" \/>\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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