{"id":708920,"date":"2024-11-20T11:46:31","date_gmt":"2024-11-20T10:46:31","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=708920"},"modified":"2024-11-20T11:46:31","modified_gmt":"2024-11-20T10:46:31","slug":"duong-cong-lam-lanh-trong-phan-tich-nhiet-la-gi","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/duong-cong-lam-lanh-trong-phan-tich-nhiet-la-gi\/","title":{"rendered":"\u0110\u01b0\u1eddng Cong L\u00e0m L\u1ea1nh Trong Ph\u00e2n T\u00edch Nhi\u1ec7t L\u00e0 G\u00ec?"},"content":{"rendered":"<p class=\"sidekick\">\u0110\u01b0\u1eddng cong l\u00e0m l\u1ea1nh trong ph\u00e2n t\u00edch nhi\u1ec7t l\u00e0 bi\u1ec3u \u0111\u1ed3 bi\u1ec3u di\u1ec5n s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 theo th\u1eddi gian khi v\u1eadt li\u1ec7u ngu\u1ed9i, gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c t\u00ednh ch\u1ea5t nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/duong_cong_lam_lanh_trong_phan_tich_nhiet_la_gi.png\" alt=\"\u0110\u01b0\u1eddng Cong L\u00e0m L\u1ea1nh Trong Ph\u00e2n T\u00edch Nhi\u1ec7t L\u00e0 G\u00ec?\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>\u0110\u01b0\u1eddng Cong L\u00e0m L\u1ea1nh Trong Ph\u00e2n T\u00edch Nhi\u1ec7t L\u00e0 G\u00ec?<\/h2>\n<p>\u0110\u01b0\u1eddng cong l\u00e0m l\u1ea1nh l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng trong ph\u00e2n t\u00edch nhi\u1ec7t, m\u1ed9t nh\u00e1nh c\u1ee7a k\u1ef9 thu\u1eadt nhi\u1ec7t. N\u00f3 gi\u00fap bi\u1ec3u di\u1ec5n s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u1ed9t v\u1eadt th\u1ec3 ho\u1eb7c m\u1ed9t h\u1ec7 th\u1ed1ng qua th\u1eddi gian khi n\u00f3 \u0111\u01b0\u1ee3c l\u00e0m l\u1ea1nh t\u1eeb m\u1ed9t nhi\u1ec7t \u0111\u1ed9 cao \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n.<\/p>\n<h2>Nguy\u00ean l\u00fd c\u1ee7a \u0110\u01b0\u1eddng Cong L\u00e0m L\u1ea1nh<\/h2>\n<p>\u0110\u01b0\u1eddng cong l\u00e0m l\u1ea1nh th\u1ec3 hi\u1ec7n qu\u00e1 tr\u00ecnh m\u1ea5t nhi\u1ec7t c\u1ee7a m\u1ed9t ch\u1ea5t, th\u01b0\u1eddng l\u00e0 ch\u1ea5t r\u1eafn ho\u1eb7c ch\u1ea5t l\u1ecfng, khi n\u00f3 \u0111\u01b0\u1ee3c l\u00e0m l\u1ea1nh. Trong qu\u00e1 tr\u00ecnh n\u00e0y, nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u1ea5t \u0111\u01b0\u1ee3c ghi l\u1ea1i t\u1ea1i nhi\u1ec1u th\u1eddi \u0111i\u1ec3m kh\u00e1c nhau t\u1ea1o th\u00e0nh m\u1ed9t bi\u1ec3u \u0111\u1ed3 nhi\u1ec7t \u0111\u1ed9 &#8211; th\u1eddi gian. \u0110\u00e2y l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng \u0111\u1ec3 ph\u00e2n t\u00edch c\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a ch\u1ea5t li\u1ec7u, ch\u1eb3ng h\u1ea1n nh\u01b0 nhi\u1ec7t dung, nhi\u1ec7t d\u1eabn v\u00e0 c\u00e1c bi\u1ebfn \u0111\u1ed5i pha.<\/p>\n<h2>C\u00e1ch V\u1ebd \u0110\u01b0\u1eddng Cong L\u00e0m L\u1ea1nh<\/h2>\n<ul>\n<li>M\u1ed9t m\u1eabu ch\u1ea5t li\u1ec7u \u0111\u01b0\u1ee3c gia nhi\u1ec7t \u0111\u1ebfn m\u1ed9t nhi\u1ec7t \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh.<\/li>\n<li>M\u1eabu ch\u1ea5t li\u1ec7u sau \u0111\u00f3 \u0111\u01b0\u1ee3c \u0111\u1ec3 ngu\u1ed9i trong m\u00f4i tr\u01b0\u1eddng ki\u1ec3m so\u00e1t.<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 c\u1ee7a m\u1eabu \u0111\u01b0\u1ee3c \u0111o t\u1ea1i nhi\u1ec1u kho\u1ea3ng th\u1eddi gian kh\u00e1c nhau v\u00e0 c\u00e1c d\u1eef li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 t\u1ea1o ra bi\u1ec3u \u0111\u1ed3, v\u1edbi tr\u1ee5c X l\u00e0 th\u1eddi gian v\u00e0 tr\u1ee5c Y l\u00e0 nhi\u1ec7t \u0111\u1ed9.<\/li>\n<\/ul>\n<h2>\u1ee8ng D\u1ee5ng c\u1ee7a \u0110\u01b0\u1eddng Cong L\u00e0m L\u1ea1nh<\/h2>\n<p>\u0110\u01b0\u1eddng cong l\u00e0m l\u1ea1nh c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n trong c\u00f4ng nghi\u1ec7p v\u00e0 nghi\u00ean c\u1ee9u:<\/p>\n<ol>\n<li><b>Ph\u00e2n t\u00edch bi\u1ebfn \u0111\u1ed5i pha:<\/b> Gi\u00fap nh\u1eadn bi\u1ebft nh\u1eefng \u0111i\u1ec3m nhi\u1ec7t \u0111\u1ed9 m\u00e0 \u1edf \u0111\u00f3 ch\u1ea5t li\u1ec7u chuy\u1ec3n t\u1eeb pha n\u00e0y sang pha kh\u00e1c, v\u00ed d\u1ee5 nh\u01b0 t\u1eeb r\u1eafn sang l\u1ecfng.<\/li>\n<li><b>\u0110o nhi\u1ec7t dung c\u1ee5 th\u1ec3:<\/b> Gi\u00fap x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng nhi\u1ec7t c\u1ea7n thi\u1ebft \u0111\u1ec3 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 c\u1ee7a ch\u1ea5t li\u1ec7u m\u1ed9t \u0111\u01a1n v\u1ecb \u0111\u1ed9.<\/li>\n<li><b>Ph\u00e2n t\u00edch c\u00e1c qu\u00e1 tr\u00ecnh l\u00e0m l\u1ea1nh:<\/b> \u0110\u01b0\u1ee3c \u00e1p d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m, d\u01b0\u1ee3c ph\u1ea9m \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 an to\u00e0n s\u1ea3n ph\u1ea9m.<\/li>\n<\/ol>\n<h2>C\u00f4ng Th\u1ee9c Li\u00ean Quan<\/h2>\n<p>Trong qu\u00e1 tr\u00ecnh l\u00e0m l\u1ea1nh, nhi\u1ec7t l\u01b0\u1ee3ng \\( Q \\) th\u1ea5t tho\u00e1t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n b\u1eb1ng c\u00f4ng th\u1ee9c:<\/p>\n<p>\n\\[ Q = m \\cdot C_p \\cdot \\Delta T \\]\n<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>\\( Q \\): Nhi\u1ec7t l\u01b0\u1ee3ng th\u1ea5t tho\u00e1t (Joules)<\/li>\n<li>\\( m \\): Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a ch\u1ea5t (kg)<\/li>\n<li>\\( C_p \\): Nhi\u1ec7t dung ri\u00eang (J\/(kg*K))<\/li>\n<li>\\( \\Delta T \\): S\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 (K)<\/li>\n<\/ul>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>\u0110\u01b0\u1eddng cong l\u00e0m l\u1ea1nh l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng trong ph\u00e2n t\u00edch nhi\u1ec7t v\u00e0 c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng trong k\u1ef9 thu\u1eadt v\u00e0 c\u00f4ng nghi\u1ec7p. B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 c\u00e1ch m\u1ed9t ch\u1ea5t li\u1ec7u m\u1ea5t nhi\u1ec7t qua th\u1eddi gian, ch\u00fang ta c\u00f3 th\u1ec3 ph\u00e2n t\u00edch v\u00e0 t\u1ed1i \u01b0u h\u00f3a nhi\u1ec1u qu\u00e1 tr\u00ecnh li\u00ean quan \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 v\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u01b0\u1eddng cong l\u00e0m l\u1ea1nh trong ph\u00e2n t\u00edch nhi\u1ec7t l\u00e0 bi\u1ec3u \u0111\u1ed3 bi\u1ec3u di\u1ec5n s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 theo th\u1eddi gian khi v\u1eadt li\u1ec7u ngu\u1ed9i, gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c t\u00ednh ch\u1ea5t nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u.<\/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 - 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