{"id":683187,"date":"2024-08-23T02:57:41","date_gmt":"2024-08-23T01:57:41","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=683187"},"modified":"2024-08-23T02:57:41","modified_gmt":"2024-08-23T01:57:41","slug":"4-phuong-phap-do-do-khuech-tan-nhiet-do","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/4-phuong-phap-do-do-khuech-tan-nhiet-do\/","title":{"rendered":"4 Ph\u01b0\u01a1ng Ph\u00e1p \u0110o \u0110\u1ed9 Khu\u1ebfch T\u00e1n Nhi\u1ec7t \u0110\u1ed9"},"content":{"rendered":"<p class=\"sidekick\">4 Ph\u01b0\u01a1ng Ph\u00e1p \u0110o \u0110\u1ed9 Khu\u1ebfch T\u00e1n Nhi\u1ec7t \u0110\u1ed9: Gi\u1edbi thi\u1ec7u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111o l\u01b0\u1eddng hi\u1ec7u qu\u1ea3 v\u00e0 c\u00f4ng ngh\u1ec7 s\u1eed d\u1ee5ng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/4_phuong_phap_do_do_khuech_tan_nhiet_do.png\" alt=\"4 Ph\u01b0\u01a1ng Ph\u00e1p \u0110o \u0110\u1ed9 Khu\u1ebfch T\u00e1n Nhi\u1ec7t \u0110\u1ed9\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>4 Ph\u01b0\u01a1ng Ph\u00e1p \u0110o \u0110\u1ed9 Khu\u1ebfch T\u00e1n Nhi\u1ec7t \u0110\u1ed9<\/h2>\n<p>\u0110\u1ed9 khu\u1ebfch t\u00e1n nhi\u1ec7t \u0111\u1ed9 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, gi\u00fap x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng chuy\u1ec3n nhi\u1ec7t c\u1ee7a m\u1ed9t v\u1eadt li\u1ec7u. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ed1n ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn \u0111\u1ec3 \u0111o \u0111\u1ed9 khu\u1ebfch t\u00e1n nhi\u1ec7t \u0111\u1ed9:<\/p>\n<ul>\n<li>Ph\u01b0\u01a1ng ph\u00e1p xung nhi\u1ec7t<\/li>\n<li>Ph\u01b0\u01a1ng ph\u00e1p s\u1eed d\u1ee5ng c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n<\/li>\n<li>Ph\u01b0\u01a1ng ph\u00e1p s\u1eed d\u1ee5ng \u1ed1ng nhi\u1ec7t<\/li>\n<li>Ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng s\u1ed1<\/li>\n<\/ul>\n<h2>1. Ph\u01b0\u01a1ng Ph\u00e1p Xung Nhi\u1ec7t<\/h2>\n<p>Ph\u01b0\u01a1ng ph\u00e1p xung nhi\u1ec7t d\u1ef1a tr\u00ean vi\u1ec7c \u00e1p d\u1ee5ng m\u1ed9t xung nhi\u1ec7t v\u00e0o b\u1ec1 m\u1eb7t c\u1ee7a v\u1eadt li\u1ec7u v\u00e0 \u0111o ph\u1ea3n \u1ee9ng nhi\u1ec7t c\u1ee7a n\u00f3 theo th\u1eddi gian. Quy tr\u00ecnh n\u00e0y bao g\u1ed3m:<\/p>\n<ol>\n<li>\u00c1p d\u1ee5ng m\u1ed9t xung nhi\u1ec7t ng\u1eafn l\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u.<\/li>\n<li>\u0110o nhi\u1ec7t \u0111\u1ed9 theo th\u1eddi gian t\u1ea1i m\u1ed9t \u0111i\u1ec3m kh\u00e1c tr\u00ean c\u00f9ng b\u1ec1 m\u1eb7t ho\u1eb7c \u1edf m\u1eb7t \u0111\u1ed1i di\u1ec7n.<\/li>\n<li>S\u1eed d\u1ee5ng ph\u01b0\u01a1ng tr\u00ecnh Fourier \u0111\u1ec3 t\u00ednh to\u00e1n \u0111\u1ed9 khu\u1ebfch t\u00e1n nhi\u1ec7t \u0111\u1ed9.<\/li>\n<\/ol>\n<p>C\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9 khu\u1ebfch t\u00e1n nhi\u1ec7t \u0111\u1ed9 \\( \\alpha \\) l\u00e0:<\/p>\n<p>\\[ \\alpha = \\frac{k}{\\rho c_p} \\]\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>k: \u0111\u1ed9 d\u1eabn nhi\u1ec7t (W\/m\u00b7K)<\/li>\n<li>\\( \\rho \\): kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang (kg\/m<sup>3<\/sup>)<\/li>\n<li>c_p: nhi\u1ec7t dung ri\u00eang (J\/kg\u00b7K)<\/li>\n<\/ul>\n<h2>2. Ph\u01b0\u01a1ng Ph\u00e1p S\u1eed D\u1ee5ng C\u1eb7p Nhi\u1ec7t \u0110i\u1ec7n<\/h2>\n<p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1eed d\u1ee5ng c\u00e1c \u0111\u1ea7u \u0111o nhi\u1ec7t \u0111i\u1ec7n \u0111\u1ec3 \u0111o gradient nhi\u1ec7t \u0111\u1ed9 tr\u00ean v\u1eadt li\u1ec7u. Quy tr\u00ecnh bao g\u1ed3m:<\/p>\n<ol>\n<li>C\u1ed1 \u0111\u1ecbnh c\u00e1c c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n t\u1ea1i hai \u0111i\u1ec3m kh\u00e1c nhau tr\u00ean v\u1eadt li\u1ec7u.<\/li>\n<li>Gia nhi\u1ec7t cho m\u1ed9t \u0111\u1ea7u \u0111\u1ec3 t\u1ea1o ra gradient nhi\u1ec7t \u0111\u1ed9.<\/li>\n<li>\u0110o s\u1ef1 thay \u0111\u1ed5i \u0111i\u1ec7n \u00e1p \u0111\u1ec3 t\u00ednh \u0111\u1ed9 khu\u1ebfch t\u00e1n nhi\u1ec7t \u0111\u1ed9.<\/li>\n<\/ol>\n<p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y cho ph\u00e9p \u0111o \u0111\u1ed9 khu\u1ebfch t\u00e1n nhi\u1ec7t \u0111\u1ed9 nhanh ch\u00f3ng v\u00e0 ch\u00ednh x\u00e1c nh\u01b0ng y\u00eau c\u1ea7u hi\u1ec7u ch\u1ec9nh ch\u00ednh x\u00e1c c\u00e1c thi\u1ebft b\u1ecb \u0111o.<\/p>\n<h2>3. Ph\u01b0\u01a1ng Ph\u00e1p S\u1eed D\u1ee5ng \u1ed0ng Nhi\u1ec7t<\/h2>\n<p>\u1ed0ng nhi\u1ec7t l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng c\u00f3 kh\u1ea3 n\u0103ng chuy\u1ec3n nhi\u1ec7t r\u1ea5t hi\u1ec7u qu\u1ea3. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y bao g\u1ed3m:<\/p>\n<ol>\n<li>S\u1eed d\u1ee5ng m\u1ed9t \u1ed1ng nhi\u1ec7t \u0111\u1ec3 t\u1ea1o ra m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn nhi\u1ec7t hi\u1ec7u qu\u1ea3 gi\u1eefa hai \u0111i\u1ec3m.<\/li>\n<li>\u0110\u1eb7t c\u00e1c c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9 t\u1ea1i hai \u0111\u1ea7u \u1ed1ng nhi\u1ec7t.<\/li>\n<li>\u0110o s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 v\u00e0 t\u00ednh to\u00e1n \u0111\u1ed9 khu\u1ebfch t\u00e1n nhi\u1ec7t \u0111\u1ed9.<\/li>\n<\/ol>\n<p>\u1ed0ng nhi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt nhi\u1ec7t do kh\u1ea3 n\u0103ng d\u1eabn nhi\u1ec7t si\u00eau vi\u1ec7t c\u1ee7a ch\u00fang.<\/p>\n<h2>4. Ph\u01b0\u01a1ng Ph\u00e1p M\u00f4 Ph\u1ecfng S\u1ed1<\/h2>\n<p>M\u00f4 ph\u1ecfng s\u1ed1 l\u00e0 ph\u01b0\u01a1ng ph\u00e1p s\u1eed d\u1ee5ng c\u00e1c ph\u1ea7n m\u1ec1m m\u00e1y t\u00ednh \u0111\u1ec3 m\u00f4 ph\u1ecfng s\u1ef1 truy\u1ec1n nhi\u1ec7t trong v\u1eadt li\u1ec7u. C\u00e1c b\u01b0\u1edbc th\u1ef1c hi\u1ec7n bao g\u1ed3m:<\/p>\n<ol>\n<li>X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh s\u1ed1 c\u1ee7a v\u1eadt li\u1ec7u v\u00e0 \u0111i\u1ec1u ki\u1ec7n bi\u00ean.<\/li>\n<li>S\u1eed d\u1ee5ng ph\u01b0\u01a1ng tr\u00ecnh nhi\u1ec7t Fourier \u0111\u1ec3 m\u00f4 ph\u1ecfng s\u1ef1 truy\u1ec1n nhi\u1ec7t.<\/li>\n<li>Ph\u00e2n t\u00edch k\u1ebft qu\u1ea3 m\u00f4 ph\u1ecfng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 khu\u1ebfch t\u00e1n nhi\u1ec7t \u0111\u1ed9.<\/li>\n<\/ol>\n<p>Ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng s\u1ed1 r\u1ea5t linh ho\u1ea1t v\u00e0 c\u00f3 th\u1ec3 \u1ee9ng d\u1ee5ng cho nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u v\u00e0 \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau, nh\u01b0ng \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c chuy\u00ean s\u00e2u v\u1ec1 c\u00e1c ph\u1ea7n m\u1ec1m m\u00f4 ph\u1ecfng v\u00e0 m\u00e1y t\u00ednh.<\/p>\n<p>Nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p tr\u00ean m\u1ed7i ph\u01b0\u01a1ng c\u00f3 \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang, t\u00f9y v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 m\u00e0 ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111o \u0111\u1ed9 khu\u1ebfch t\u00e1n nhi\u1ec7t \u0111\u1ed9.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>4 Ph\u01b0\u01a1ng Ph\u00e1p \u0110o \u0110\u1ed9 Khu\u1ebfch T\u00e1n Nhi\u1ec7t \u0110\u1ed9: Gi\u1edbi thi\u1ec7u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111o l\u01b0\u1eddng hi\u1ec7u qu\u1ea3 v\u00e0 c\u00f4ng ngh\u1ec7 s\u1eed d\u1ee5ng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t.<\/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>4 Ph\u01b0\u01a1ng Ph\u00e1p \u0110o \u0110\u1ed9 Khu\u1ebfch T\u00e1n 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