{"id":698185,"date":"2024-11-28T22:23:01","date_gmt":"2024-11-28T21:23:01","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=698185"},"modified":"2024-11-28T22:23:01","modified_gmt":"2024-11-28T21:23:01","slug":"phan-tich-nang-suat-trong-vat-lieu-cach-nhiet","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/phan-tich-nang-suat-trong-vat-lieu-cach-nhiet\/","title":{"rendered":"Ph\u00e2n t\u00edch n\u0103ng su\u1ea5t trong v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t"},"content":{"rendered":"<p class=\"sidekick\">Ph\u00e2n t\u00edch n\u0103ng su\u1ea5t trong v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t: Hi\u1ec3u r\u00f5 c\u00e1ch c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 t\u1ed1i \u01b0u ho\u00e1 hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng v\u00e0 gi\u1ea3m chi ph\u00ed.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/phan_tich_nang_suat_trong_vat_lieu_cach_nhiet.png\" alt=\"Ph\u00e2n t\u00edch n\u0103ng su\u1ea5t trong v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Ph\u00e2n T\u00edch N\u0103ng Su\u1ea5t Trong V\u1eadt Li\u1ec7u C\u00e1ch Nhi\u1ec7t<\/h2>\n<p>V\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c gi\u1ea3m thi\u1ec3u s\u1ef1 truy\u1ec1n nhi\u1ec7t, t\u1eeb \u0111\u00f3 gi\u00fap duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng. N\u0103ng su\u1ea5t c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c nhau, t\u1eeb thu\u1ed9c t\u00ednh v\u1eadt l\u00fd cho \u0111\u1ebfn \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd ph\u00e2n t\u00edch c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng v\u00e0 c\u00e1ch \u0111o l\u01b0\u1eddng n\u0103ng su\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t.<\/p>\n<h2>\u0110\u1eb7c T\u00ednh V\u1eadt L\u00fd<\/h2>\n<ul>\n<li><b>\u0110\u1ed9 d\u1eabn nhi\u1ec7t (\\(k\\)):<\/b> \u0110\u00e2y l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t v\u1eadt li\u1ec7u truy\u1ec1n nhi\u1ec7t. V\u1eadt li\u1ec7u c\u00f3 \\(k\\) th\u1ea5p th\u00ec kh\u1ea3 n\u0103ng c\u00e1ch nhi\u1ec7t t\u1ed1t h\u01a1n. \u0110\u01a1n v\u1ecb \u0111o th\u01b0\u1eddng l\u00e0 W\/m\u00b7K.<\/li>\n<li><b>\u0110\u1ed9 d\u00e0y (\\(d\\)):<\/b> \u0110\u1ed9 d\u00e0y c\u1ee7a v\u1eadt li\u1ec7u \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn kh\u1ea3 n\u0103ng c\u00e1ch nhi\u1ec7t. V\u1eadt li\u1ec7u c\u00e0ng d\u00e0y th\u00ec kh\u1ea3 n\u0103ng c\u1ea3n nhi\u1ec7t c\u00e0ng t\u1ed1t.<\/li>\n<li><b>Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang (\\(\u03c1\\)):<\/b> Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u00e0ng th\u1ea5p th\u00ec v\u1eadt li\u1ec7u c\u00e0ng nh\u1eb9 v\u00e0 c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng l\u1eafp \u0111\u1eb7t.<\/li>\n<\/ul>\n<h2>Y\u1ebfu T\u1ed1 \u1ea2nh H\u01b0\u1edfng \u0110\u1ebfn N\u0103ng Su\u1ea5t<\/h2>\n<ol>\n<li><b>Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng:<\/b> M\u1ee9c \u0111\u1ed9 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa hai m\u1eb7t c\u1ee7a v\u1eadt li\u1ec7u s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn n\u0103ng su\u1ea5t c\u00e1ch nhi\u1ec7t.<\/li>\n<li><b>\u0110\u1ed9 \u1ea9m:<\/b> \u0110\u1ed9 \u1ea9m cao c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t.<\/li>\n<li><b>S\u1ef1 l\u1eafp \u0111\u1eb7t:<\/b> Vi\u1ec7c l\u1eafp \u0111\u1eb7t kh\u00f4ng \u0111\u00fang c\u00e1ch c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ea5t hi\u1ec7u qu\u1ea3 c\u00e1ch nhi\u1ec7t, th\u1eadm ch\u00ed gi\u1ea3m tu\u1ed5i th\u1ecd c\u1ee7a v\u1eadt li\u1ec7u.<\/li>\n<\/ol>\n<h2>Ph\u01b0\u01a1ng Ph\u00e1p \u0110o L\u01b0\u1eddng<\/h2>\n<p>Vi\u1ec7c \u0111o l\u01b0\u1eddng n\u0103ng su\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t th\u01b0\u1eddng d\u1ef1a tr\u00ean m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p sau:<\/p>\n<ol>\n<li><b>Th\u00ed nghi\u1ec7m truy\u1ec1n nhi\u1ec7t:<\/b> Th\u1eed nghi\u1ec7m n\u00e0y \u0111o l\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 truy\u1ec1n nhi\u1ec7t qua v\u1eadt li\u1ec7u d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n ki\u1ec3m so\u00e1t.<\/li>\n<li><b>Th\u1eed nghi\u1ec7m t\u1ea1i ch\u1ed7:<\/b> \u0110\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 c\u00e1ch nhi\u1ec7t khi v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t th\u1ef1c t\u1ebf, th\u01b0\u1eddng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb \u0111o nhi\u1ec7t \u0111\u1ed9 chuy\u00ean d\u1ee5ng.<\/li>\n<\/ol>\n<h2>Ph\u01b0\u01a1ng Tr\u00ecnh C\u01a1 B\u1ea3n<\/h2>\n<p>M\u1ed9t ph\u01b0\u01a1ng tr\u00ecnh c\u01a1 b\u1ea3n \u0111\u1ec3 t\u00ednh to\u00e1n hi\u1ec7u qu\u1ea3 c\u00e1ch nhi\u1ec7t l\u00e0:<\/p>\n<p>\\[<br \/>\nQ = \\frac{k \\cdot A \\cdot \\Delta T}{d}<br \/>\n\\]\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>Q: Nhi\u1ec7t l\u01b0\u1ee3ng truy\u1ec1n qua v\u1eadt li\u1ec7u (W)<\/li>\n<li>k: \u0110\u1ed9 d\u1eabn nhi\u1ec7t (W\/m\u00b7K)<\/li>\n<li>A: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t (m\u00b2)<\/li>\n<li>\\Delta T: Ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 (K)<\/li>\n<li>d: \u0110\u1ed9 d\u00e0y c\u1ee7a v\u1eadt li\u1ec7u (m)<\/li>\n<\/ul>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>Hi\u1ec3u r\u00f5 v\u1ec1 n\u0103ng su\u1ea5t c\u00e1ch nhi\u1ec7t c\u00f9ng v\u1edbi c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng v\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111o l\u01b0\u1eddng s\u1ebd gi\u00fap ch\u00fang ta l\u1ef1a ch\u1ecdn v\u00e0 s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t hi\u1ec7u qu\u1ea3 h\u01a1n. \u0110\u00e2y l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong vi\u1ec7c thi\u1ebft k\u1ebf c\u00e1c c\u00f4ng tr\u00ecnh ki\u1ebfn tr\u00fac v\u00e0 h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt nh\u1eb1m ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng v\u00e0 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ph\u00e2n t\u00edch n\u0103ng su\u1ea5t trong v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t: Hi\u1ec3u r\u00f5 c\u00e1ch c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 t\u1ed1i \u01b0u ho\u00e1 hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng v\u00e0 gi\u1ea3m 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 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