{"id":689920,"date":"2024-08-31T01:31:41","date_gmt":"2024-08-31T00:31:41","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=689920"},"modified":"2024-08-31T01:31:41","modified_gmt":"2024-08-31T00:31:41","slug":"cach-nhiet-voi-aerogel-trong-cac-ung-dung-nhiet","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/cach-nhiet-voi-aerogel-trong-cac-ung-dung-nhiet\/","title":{"rendered":"C\u00e1ch nhi\u1ec7t v\u1edbi aerogel trong c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t"},"content":{"rendered":"<p class=\"sidekick\">C\u00e1ch nhi\u1ec7t v\u1edbi aerogel trong c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t: T\u00ecm hi\u1ec3u v\u1ec1 v\u1eadt li\u1ec7u nh\u1eb9, hi\u1ec7u qu\u1ea3 cao n\u00e0y trong vi\u1ec7c c\u00e1ch nhi\u1ec7t v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng trong c\u00f4ng nghi\u1ec7p v\u00e0 x\u00e2y d\u1ef1ng.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/cach_nhiet_voi_aerogel_trong_cac_ung_dung_nhiet.png\" alt=\"C\u00e1ch nhi\u1ec7t v\u1edbi aerogel trong c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>C\u00e1ch Nhi\u1ec7t v\u1edbi Aerogel trong C\u00e1c \u1ee8ng D\u1ee5ng Nhi\u1ec7t<\/h2>\n<p>Aerogel l\u00e0 m\u1ed9t trong nh\u1eefng v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t ti\u00ean ti\u1ebfn nh\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t ng\u00e0y nay. V\u1eadt li\u1ec7u n\u00e0y n\u1ed5i b\u1eadt v\u1edbi kh\u1ea3 n\u0103ng c\u00e1ch nhi\u1ec7t tuy\u1ec7t v\u1eddi v\u00e0 c\u1ea5u tr\u00fac si\u00eau nh\u1eb9.<\/p>\n<h2>Aerogel l\u00e0 g\u00ec?<\/h2>\n<p>Aerogel l\u00e0 m\u1ed9t v\u1eadt li\u1ec7u r\u1eafn nh\u01b0ng g\u1ea7n nh\u01b0 ho\u00e0n to\u00e0n r\u1ed7ng, ch\u1ee9a kh\u00f4ng kh\u00ed trong c\u00e1c l\u1ed7 nh\u1ecf li ti. N\u00f3 \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean t\u1eeb m\u1ed9t khung k\u1ebft c\u1ea5u r\u1ea5t m\u1ecfng v\u00e0 nh\u1eb9, th\u01b0\u1eddng l\u00e0 t\u1eeb c\u00e1c ph\u00e2n t\u1eed silica (SiO<sub>2<\/sub>), carbon, ho\u1eb7c c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c.<\/p>\n<h2>T\u00ednh Ch\u1ea5t N\u1ed5i B\u1eadt c\u1ee7a Aerogel<\/h2>\n<p><u1><\/p>\n<li>\u0110\u1ed9 d\u1eabn nhi\u1ec7t r\u1ea5t th\u1ea5p: Aerogel c\u00f3 \u0111\u1ed9 d\u1eabn nhi\u1ec7t th\u1ea5p nh\u1ea5t trong c\u00e1c v\u1eadt li\u1ec7u r\u1eafn, ch\u1ec9 kho\u1ea3ng 0.013 \u0111\u1ebfn 0.018 W\/m\u00b7K.<\/li>\n<li>Si\u00eau nh\u1eb9: V\u1edbi m\u1eadt \u0111\u1ed9 c\u1ee7a n\u00f3 ch\u1ec9 kho\u1ea3ng 3 kg\/m<sup>3<\/sup> \u0111\u1ebfn 350 kg\/m<sup>3<\/sup>, aerogel g\u1ea7n nh\u01b0 nh\u1eb9 nh\u1ea5t trong c\u00e1c v\u1eadt li\u1ec7u r\u1eafn.<\/li>\n<li>Kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u00e1y cao: Aerogel c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao m\u00e0 kh\u00f4ng m\u1ea5t \u0111i t\u00ednh ch\u1ea5t c\u00e1ch nhi\u1ec7t.<\/li>\n<li>Kh\u00f4ng th\u1ea5m n\u01b0\u1edbc: Aerogel c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m ch\u1ed1ng n\u01b0\u1edbc, gi\u00fap n\u00f3 b\u1ec1n b\u1ec9 trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u1ea9m \u01b0\u1edbt.<\/li>\n<p><\/u1><\/p>\n<h2>\u1ee8ng D\u1ee5ng c\u1ee7a Aerogel trong Nhi\u1ec7t<\/h2>\n<p>Aerogel \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau nh\u1edd v\u00e0o t\u00ednh ch\u1ea5t c\u00e1ch nhi\u1ec7t \u01b0u vi\u1ec7t c\u1ee7a n\u00f3.<\/p>\n<p><u1><\/p>\n<li><b>T\u00f2a nh\u00e0 v\u00e0 c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng:<\/b> Aerogel \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u00e1ch nhi\u1ec7t cho t\u01b0\u1eddng, c\u1eeda s\u1ed5 v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c c\u1ee7a c\u00f4ng tr\u00ecnh. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1eef \u1ea5m v\u00e0o m\u00f9a \u0111\u00f4ng v\u00e0 m\u00e1t v\u00e0o m\u00f9a h\u00e8, ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng \u0111\u00e1ng k\u1ec3.<\/li>\n<li><b>C\u00e1ch nhi\u1ec7t trong c\u00f4ng nghi\u1ec7p:<\/b> Aerogel \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u00e1ch nhi\u1ec7t cho \u1ed1ng d\u1eabn, b\u1ec3 ch\u1ee9a v\u00e0 c\u00e1c thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p kh\u00e1c. C\u00e1c \u0111\u1eb7c t\u00ednh c\u00e1ch nhi\u1ec7t c\u1ee7a aerogel l\u00e0m gi\u1ea3m t\u1ed5n th\u1ea5t nhi\u1ec7t v\u00e0 t\u0103ng hi\u1ec7u qu\u1ea3 l\u00e0m vi\u1ec7c c\u1ee7a thi\u1ebft b\u1ecb.<\/li>\n<li><b>Aerospace v\u00e0 h\u00e0ng kh\u00f4ng:<\/b> Trong ng\u00e0nh h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, aerogel \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u00e1ch nhi\u1ec7t v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c thi\u1ebft b\u1ecb kh\u1ecfi nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t trong kh\u00f4ng gian.<\/li>\n<li><b>Trang ph\u1ee5c v\u00e0 d\u1ee5ng c\u1ee5 b\u1ea3o h\u1ed9:<\/b> Aerogel c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 trang ph\u1ee5c b\u1ea3o h\u1ed9 nh\u1eb1m c\u00e1ch nhi\u1ec7t v\u00e0 b\u1ea3o v\u1ec7 ng\u01b0\u1eddi m\u1eb7c kh\u1ecfi nhi\u1ec7t \u0111\u1ed9 c\u1ef1c \u0111oan.<\/li>\n<p><\/u1><\/p>\n<h2>\u0110\u1ed9 D\u1eabn Nhi\u1ec7t Th\u1ea5p v\u00e0 C\u00e1ch Nhi\u1ec7t Hi\u1ec7u Qu\u1ea3<\/h2>\n<p>T\u00ednh ch\u1ea5t c\u00e1ch nhi\u1ec7t \u01b0u vi\u1ec7t c\u1ee7a aerogel ch\u1ee7 y\u1ebfu d\u1ef1a v\u00e0o \u0111\u1ed9 d\u1eabn nhi\u1ec7t r\u1ea5t th\u1ea5p c\u1ee7a n\u00f3. C\u00f4ng th\u1ee9c t\u00ednh truy\u1ec1n nhi\u1ec7t qua v\u1eadt li\u1ec7u l\u00e0:<\/p>\n<p><i>Q = \\(\\frac{k \\cdot A \\cdot \\Delta T}{d}\\)<\/i><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><u1><\/p>\n<li>Q l\u00e0 l\u01b0\u1ee3ng nhi\u1ec7t (W)<\/li>\n<li>k l\u00e0 h\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t (W\/m\u00b7K)<\/li>\n<li>A l\u00e0 di\u1ec7n t\u00edch (m<sup>2<\/sup>)<\/li>\n<li>\u0394T l\u00e0 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 (K)<\/li>\n<li>d l\u00e0 \u0111\u1ed9 d\u00e0y c\u1ee7a v\u1eadt li\u1ec7u (m)<\/li>\n<p><\/u1><\/p>\n<p>V\u1edbi k r\u1ea5t th\u1ea5p, aerogel gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 l\u01b0\u1ee3ng nhi\u1ec7t truy\u1ec1n qua, \u0111\u1ea3m b\u1ea3o c\u00e1ch nhi\u1ec7t hi\u1ec7u qu\u1ea3.<\/p>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>Aerogel l\u00e0 m\u1ed9t v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t ti\u00ean ti\u1ebfn v\u1edbi nhi\u1ec1u \u01b0u \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i nh\u01b0 \u0111\u1ed9 d\u1eabn nhi\u1ec7t th\u1ea5p, nh\u1eb9, v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u00e1y cao. C\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a aerogel trong x\u00e2y d\u1ef1ng, c\u00f4ng nghi\u1ec7p, h\u00e0ng kh\u00f4ng v\u00e0 nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c \u0111ang ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn v\u00e0 ch\u1ee9ng t\u1ecf t\u00ednh hi\u1ec7u qu\u1ea3 cao. Vi\u1ec7c hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng aerogel trong c\u00e1c d\u1ef1 \u00e1n c\u00e1ch nhi\u1ec7t s\u1ebd mang l\u1ea1i l\u1ee3i \u00edch to l\u1edbn v\u1ec1 m\u1eb7t 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>C\u00e1ch nhi\u1ec7t v\u1edbi aerogel trong c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t: T\u00ecm hi\u1ec3u v\u1ec1 v\u1eadt li\u1ec7u nh\u1eb9, hi\u1ec7u qu\u1ea3 cao n\u00e0y trong vi\u1ec7c c\u00e1ch nhi\u1ec7t v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng trong c\u00f4ng nghi\u1ec7p v\u00e0 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 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00e1ch nhi\u1ec7t 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