{"id":707993,"date":"2024-09-01T18:26:16","date_gmt":"2024-09-01T17:26:16","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=707993"},"modified":"2024-09-01T18:26:16","modified_gmt":"2024-09-01T17:26:16","slug":"kien-thuc-co-ban-ve-nhiet-dong-luc-hoc-trong-ky-thuat","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/kien-thuc-co-ban-ve-nhiet-dong-luc-hoc-trong-ky-thuat\/","title":{"rendered":"Ki\u1ebfn Th\u1ee9c C\u01a1 B\u1ea3n V\u1ec1 Nhi\u1ec7t \u0110\u1ed9ng L\u1ef1c H\u1ecdc Trong K\u1ef9 Thu\u1eadt"},"content":{"rendered":"<p class=\"sidekick\">Ki\u1ebfn Th\u1ee9c C\u01a1 B\u1ea3n V\u1ec1 Nhi\u1ec7t \u0110\u1ed9ng L\u1ef1c H\u1ecdc Trong K\u1ef9 Thu\u1eadt: T\u00ecm hi\u1ec3u nguy\u00ean l\u00fd c\u01a1 b\u1ea3n, \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf v\u00e0 vai tr\u00f2 quan tr\u1ecdng c\u1ee7a nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc trong k\u1ef9 thu\u1eadt.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/kien_thuc_co_ban_ve_nhiet_dong_luc_hoc_trong_ky_thuat.png\" alt=\"Ki\u1ebfn Th\u1ee9c C\u01a1 B\u1ea3n V\u1ec1 Nhi\u1ec7t \u0110\u1ed9ng L\u1ef1c H\u1ecdc Trong K\u1ef9 Thu\u1eadt\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Ki\u1ebfn Th\u1ee9c C\u01a1 B\u1ea3n V\u1ec1 Nhi\u1ec7t \u0110\u1ed9ng L\u1ef1c H\u1ecdc Trong K\u1ef9 Thu\u1eadt<\/h2>\n<p>Nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc l\u00e0 m\u1ed9t nh\u00e1nh quan tr\u1ecdng trong k\u1ef9 thu\u1eadt, nghi\u00ean c\u1ee9u v\u1ec1 nhi\u1ec7t \u0111\u1ed9, n\u0103ng l\u01b0\u1ee3ng v\u00e0 c\u00e1ch ch\u00fang t\u00e1c \u0111\u1ed9ng l\u1eabn nhau. \u0110\u00e2y l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c c\u01a1 b\u1ea3n trong c\u1ea3 v\u1eadt l\u00fd v\u00e0 k\u1ef9 thu\u1eadt, \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh c\u1ee7a nhi\u1ec1u h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt kh\u00e1c nhau nh\u01b0 \u0111\u1ed9ng c\u01a1, m\u00e1y l\u00e0m l\u1ea1nh v\u00e0 l\u00f2 \u0111\u1ed1t. H\u00e3y kh\u00e1m ph\u00e1 nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc.<\/p>\n<h2>1. Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc th\u1ee9 nh\u1ea5t<\/h2>\n<p>Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc th\u1ee9 nh\u1ea5t c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ecbnh lu\u1eadt b\u1ea3o to\u00e0n n\u0103ng l\u01b0\u1ee3ng. Nguy\u00ean l\u00fd n\u00e0y kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng n\u0103ng l\u01b0\u1ee3ng kh\u00f4ng th\u1ec3 t\u1ef1 nhi\u00ean sinh ra ho\u1eb7c m\u1ea5t \u0111i, n\u00f3 ch\u1ec9 c\u00f3 th\u1ec3 chuy\u1ec3n t\u1eeb d\u1ea1ng n\u00e0y sang d\u1ea1ng kh\u00e1c. C\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc m\u00f4 t\u1ea3 nguy\u00ean l\u00fd n\u00e0y l\u00e0:<\/p>\n<p><i>dQ = dU + dW<\/i><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><i>dQ<\/i> l\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng m\u00e0 h\u1ec7 th\u1ed1ng nh\u1eadn \u0111\u01b0\u1ee3c.<\/li>\n<li><i>dU<\/i> l\u00e0 s\u1ef1 thay \u0111\u1ed5i n\u1ed9i n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng.<\/li>\n<li><i>dW<\/i> l\u00e0 c\u00f4ng su\u1ea5t m\u00e0 h\u1ec7 th\u1ed1ng th\u1ef1c hi\u1ec7n.<\/li>\n<\/ul>\n<h2>2. Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc th\u1ee9 hai<\/h2>\n<p>Nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc th\u1ee9 hai li\u00ean quan \u0111\u1ebfn t\u00ednh ch\u1ea5t kh\u00f4ng thu\u1eadn ngh\u1ecbch c\u1ee7a c\u00e1c qu\u00e1 tr\u00ecnh t\u1ef1 nhi\u00ean. N\u00f3 kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng m\u1ee9c \u0111\u1ed9 h\u1ed7n lo\u1ea1n, hay entropy, c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng k\u00edn lu\u00f4n lu\u00f4n t\u0103ng l\u00ean ho\u1eb7c kh\u00f4ng thay \u0111\u1ed5i theo th\u1eddi gian. C\u00f4ng th\u1ee9c ph\u1ed5 bi\u1ebfn m\u00f4 t\u1ea3 nguy\u00ean l\u00fd n\u00e0y l\u00e0:<\/p>\n<p><i>dS \u2265 \\frac{dQ}{T}<\/i><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><i>dS<\/i> l\u00e0 s\u1ef1 thay \u0111\u1ed5i entropy.<\/li>\n<li><i>dQ<\/i> l\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng trao \u0111\u1ed5i.<\/li>\n<li><i>T<\/i> l\u00e0 nhi\u1ec7t \u0111\u1ed9 tuy\u1ec7t \u0111\u1ed1i c\u1ee7a h\u1ec7 th\u1ed1ng.<\/li>\n<\/ul>\n<h2>3. \u1ee8ng d\u1ee5ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc trong k\u1ef9 thu\u1eadt<\/h2>\n<p>Nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt kh\u00e1c nhau, bao g\u1ed3m:<\/p>\n<ul>\n<li><b>C\u00f4ng ngh\u1ec7 nhi\u1ec7t \u0111i\u1ec7n:<\/b> Nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc gi\u00fap thi\u1ebft k\u1ebf v\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u00e1c nh\u00e0 m\u00e1y nhi\u1ec7t \u0111i\u1ec7n, \u0111\u1ea3m b\u1ea3o ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng hi\u1ec7u qu\u1ea3 v\u00e0 gi\u1ea3m thi\u1ec3u kh\u00ed th\u1ea3i.<\/li>\n<li><b>K\u1ef9 thu\u1eadt l\u00e0m l\u1ea1nh:<\/b> C\u00e1c nguy\u00ean l\u00fd nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc \u00e1p d\u1ee5ng \u0111\u1ec3 c\u1ea3i ti\u1ebfn hi\u1ec7u qu\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh v\u00e0 \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed.<\/li>\n<li><b>K\u1ef9 thu\u1eadt xe c\u1ed9:<\/b> \u0110\u1ed9ng c\u01a1 \u0111\u1ed1t trong c\u1ee7a \u00f4 t\u00f4 v\u00e0 m\u00e1y bay d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean t\u1eafc nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i nhi\u00ean li\u1ec7u th\u00e0nh \u0111\u1ed9ng l\u1ef1c.<\/li>\n<\/ul>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>Nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c c\u01a1 b\u1ea3n c\u1ee7a k\u1ef9 thu\u1eadt, cung c\u1ea5p nh\u1eefng nguy\u00ean l\u00fd c\u01a1 b\u1ea3n v\u1ec1 c\u00e1ch m\u00e0 nhi\u1ec7t v\u00e0 n\u0103ng l\u01b0\u1ee3ng ho\u1ea1t \u0111\u1ed9ng. B\u1eb1ng c\u00e1ch n\u1eafm r\u00f5 nh\u1eefng nguy\u00ean l\u00fd n\u00e0y, k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 thi\u1ebft k\u1ebf v\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ec1n v\u1eefng, t\u1eeb \u0111\u00f3 \u0111\u00f3ng g\u00f3p to l\u1edbn cho s\u1ef1 ti\u1ebfn b\u1ed9 c\u1ee7a c\u00f4ng ngh\u1ec7 v\u00e0 x\u00e3 h\u1ed9i.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ki\u1ebfn Th\u1ee9c C\u01a1 B\u1ea3n V\u1ec1 Nhi\u1ec7t \u0110\u1ed9ng L\u1ef1c H\u1ecdc Trong K\u1ef9 Thu\u1eadt: T\u00ecm hi\u1ec3u nguy\u00ean l\u00fd c\u01a1 b\u1ea3n, \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf v\u00e0 vai tr\u00f2 quan tr\u1ecdng c\u1ee7a nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc trong k\u1ef9 thu\u1eadt.<\/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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