{"id":705139,"date":"2024-11-09T04:13:01","date_gmt":"2024-11-09T03:13:01","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=705139"},"modified":"2024-11-09T04:13:01","modified_gmt":"2024-11-09T03:13:01","slug":"ky-thuat-cach-nhiet-tiet-kiem-nang-luong","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/ky-thuat-cach-nhiet-tiet-kiem-nang-luong\/","title":{"rendered":"K\u1ef9 thu\u1eadt c\u00e1ch nhi\u1ec7t ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng"},"content":{"rendered":"<p class=\"sidekick\">K\u1ef9 thu\u1eadt c\u00e1ch nhi\u1ec7t ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng: Gi\u1ea3i ph\u00e1p b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng v\u00e0 gi\u1ea3m chi ph\u00ed b\u1eb1ng c\u00e1ch c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t nhi\u1ec7t trong c\u00e1c c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/ky_thuat_cach_nhiet_tiet_kiem_nang_luong.png\" alt=\"K\u1ef9 thu\u1eadt c\u00e1ch nhi\u1ec7t ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>K\u1ef9 thu\u1eadt c\u00e1ch nhi\u1ec7t ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng<\/h2>\n<p>K\u1ef9 thu\u1eadt c\u00e1ch nhi\u1ec7t \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng v\u00e0 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng. B\u1eb1ng c\u00e1ch gi\u1ea3m l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m l\u1ea1nh ho\u1eb7c gi\u1eef \u1ea5m, c\u00e1c h\u1ec7 th\u1ed1ng c\u00e1ch nhi\u1ec7t gi\u00fap gi\u1ea3m chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng v\u00e0 l\u01b0\u1ee3ng kh\u00ed th\u1ea3i nh\u00e0 k\u00ednh.<\/p>\n<h2>C\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t<\/h2>\n<p>C\u00e1c v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>B\u00f4ng th\u1ee7y tinh<\/strong>: D\u1ea1ng s\u1ee3i l\u00e0m t\u1eeb th\u1ee7y tinh t\u00e1i ch\u1ebf, d\u1ec5 l\u1eafp \u0111\u1eb7t v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng c\u00e1ch nhi\u1ec7t t\u1ed1t.<\/li>\n<li><strong>B\u1ecdt polyurethane (PU)<\/strong>: Lo\u1ea1i b\u1ecdt c\u00f3 kh\u1ea3 n\u0103ng c\u00e1ch nhi\u1ec7t cao, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong x\u00e2y d\u1ef1ng v\u00e0 c\u00f4ng nghi\u1ec7p.<\/li>\n<li><strong>V\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t ch\u00e2n kh\u00f4ng (VIP)<\/strong>: VIP l\u00e0 l\u1edbp v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t m\u00e0 b\u00ean trong c\u00f3 kh\u00f4ng gian ch\u00e2n kh\u00f4ng, gi\u00fap h\u1ea1n ch\u1ebf s\u1ef1 truy\u1ec1n nhi\u1ec7t qua kh\u00f4ng gian.<\/li>\n<li><strong>Polystyrene<\/strong>: C\u00f3 d\u1ea1ng t\u1ea5m ho\u1eb7c h\u1ea1t, nh\u1eb9 v\u00e0 c\u00f3 \u0111\u1ed9 b\u1ec1n t\u1ed1t.<\/li>\n<\/ul>\n<h2>Ph\u01b0\u01a1ng ph\u00e1p c\u00e1ch nhi\u1ec7t<\/h2>\n<p>C\u00e1c k\u1ef9 thu\u1eadt c\u00e1ch nhi\u1ec7t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau:<\/p>\n<ol>\n<li><strong>C\u00e1ch nhi\u1ec7t b\u00ean trong<\/strong>: S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t l\u1eafp \u0111\u1eb7t tr\u1ef1c ti\u1ebfp v\u00e0o t\u01b0\u1eddng, tr\u1ea7n hay s\u00e0n nh\u00e0.<\/li>\n<li><strong>C\u00e1ch nhi\u1ec7t b\u00ean ngo\u00e0i<\/strong>: \u00c1p d\u1ee5ng l\u1edbp v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t b\u00ean ngo\u00e0i b\u1ec1 m\u1eb7t c\u00f4ng tr\u00ecnh.<\/li>\n<li><strong>K\u1ebft c\u1ea5u k\u00e9p<\/strong>: S\u1eed d\u1ee5ng hai l\u1edbp v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t, c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p v\u1edbi l\u1edbp kh\u00f4ng kh\u00ed gi\u1eefa ch\u00fang \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng hi\u1ec7u qu\u1ea3.<\/li>\n<\/ol>\n<h2>L\u1ee3i \u00edch c\u1ee7a k\u1ef9 thu\u1eadt c\u00e1ch nhi\u1ec7t<\/h2>\n<p>K\u1ef9 thu\u1eadt c\u00e1ch nhi\u1ec7t mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch nh\u01b0:<\/p>\n<ul>\n<li><strong>Ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng<\/strong>: Gi\u1ea3m nhu c\u1ea7u s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng \u0111\u1ec3 duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 l\u00fd t\u01b0\u1edfng, d\u1eabn \u0111\u1ebfn chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng th\u1ea5p h\u01a1n.<\/li>\n<li><strong>B\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng<\/strong>: Gi\u1ea3m l\u01b0\u1ee3ng kh\u00ed th\u1ea3i CO<sub>2<\/sub>, g\u00f3p ph\u1ea7n gi\u1ea3m t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng.<\/li>\n<li><strong>T\u0103ng ch\u1ea5t l\u01b0\u1ee3ng kh\u00f4ng kh\u00ed<\/strong>: Gi\u1ea3m thi\u1ec3u s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a kh\u00f4ng kh\u00ed l\u1ea1nh ho\u1eb7c n\u00f3ng t\u1eeb b\u00ean ngo\u00e0i.<\/li>\n<li><strong>T\u0103ng gi\u00e1 tr\u1ecb t\u00e0i s\u1ea3n<\/strong>: C\u00e1c c\u00f4ng tr\u00ecnh c\u00f3 h\u1ec7 th\u1ed1ng c\u00e1ch nhi\u1ec7t t\u1ed1t th\u01b0\u1eddng c\u00f3 gi\u00e1 tr\u1ecb cao h\u01a1n.<\/li>\n<\/ul>\n<h2>C\u00e1ch t\u00ednh to\u00e1n hi\u1ec7u qu\u1ea3 c\u00e1ch nhi\u1ec7t<\/h2>\n<p>\u0110\u1ec3 t\u00ednh to\u00e1n hi\u1ec7u qu\u1ea3 c\u00e1ch nhi\u1ec7t, ch\u00fang ta s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c truy\u1ec1n nhi\u1ec7t c\u01a1 b\u1ea3n:<\/p>\n<p><em>Q = U * A * (T<sub>i<\/sub> &#8211; T<sub>o<\/sub>)<\/em><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><em>Q<\/em> l\u00e0 l\u01b0\u1ee3ng nhi\u1ec7t truy\u1ec1n qua v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t (W)<\/li>\n<li><em>U<\/em> l\u00e0 h\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u (W\/m<sup>2<\/sup>K)<sup>-1<\/sup><\/li>\n<li><em>A<\/em> l\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t truy\u1ec1n nhi\u1ec7t (m<sup>2<\/sup>)<\/li>\n<li><em>T<sub>i<\/sub><\/em> l\u00e0 nhi\u1ec7t \u0111\u1ed9 b\u00ean trong (\u00b0C)<\/li>\n<li><em>T<sub>o<\/sub><\/em> l\u00e0 nhi\u1ec7t \u0111\u1ed9 b\u00ean ngo\u00e0i (\u00b0C)<\/li>\n<\/ul>\n<p>T\u1eeb c\u00f4ng th\u1ee9c n\u00e0y, ch\u00fang ta c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng \u0111\u1ec3 gi\u1ea3m l\u01b0\u1ee3ng nhi\u1ec7t truy\u1ec1n qua, c\u1ea7n s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u c\u00f3 h\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t <em>U<\/em> th\u1ea5p v\u00e0 t\u0103ng di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>K\u1ef9 thu\u1eadt c\u00e1ch nhi\u1ec7t l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong vi\u1ec7c thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng. B\u1eb1ng c\u00e1ch ch\u1ecdn l\u1ef1a v\u00e0 s\u1eed d\u1ee5ng c\u00e1c v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t ph\u00f9 h\u1ee3p, ch\u00fang ta c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng, b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng v\u00e0 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng cu\u1ed9c s\u1ed1ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>K\u1ef9 thu\u1eadt c\u00e1ch nhi\u1ec7t ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng: Gi\u1ea3i ph\u00e1p b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng v\u00e0 gi\u1ea3m chi ph\u00ed b\u1eb1ng c\u00e1ch c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t nhi\u1ec7t trong c\u00e1c c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng.<\/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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