{"id":699265,"date":"2024-10-25T16:29:03","date_gmt":"2024-10-25T15:29:03","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=699265"},"modified":"2024-10-25T16:29:03","modified_gmt":"2024-10-25T15:29:03","slug":"hieu-suat-cua-lop-phu-chan-nhiet","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/hieu-suat-cua-lop-phu-chan-nhiet\/","title":{"rendered":"Hi\u1ec7u su\u1ea5t c\u1ee7a l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t"},"content":{"rendered":"<p class=\"sidekick\">Hi\u1ec7u su\u1ea5t c\u1ee7a l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t: Kh\u00e1m ph\u00e1 c\u00e1ch l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t ho\u1ea1t \u0111\u1ed9ng, c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t n\u0103ng l\u01b0\u1ee3ng v\u00e0 b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t kh\u1ecfi t\u00e1c \u0111\u1ed9ng nhi\u1ec7t.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/hieu_suat_cua_lop_phu_chan_nhiet.png\" alt=\"Hi\u1ec7u su\u1ea5t c\u1ee7a l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Hi\u1ec7u su\u1ea5t c\u1ee7a l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t<\/h2>\n<p>Trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 c\u00e1ch nhi\u1ec7t v\u00e0 t\u0103ng c\u01b0\u1eddng hi\u1ec7u su\u1ea5t nhi\u1ec7t c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng v\u00e0 thi\u1ebft b\u1ecb. Hi\u1ec7u su\u1ea5t c\u1ee7a l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 d\u1ef1a tr\u00ean kh\u1ea3 n\u0103ng c\u1ee7a ch\u00fang trong vi\u1ec7c gi\u1ea3m thi\u1ec3u s\u1ef1 truy\u1ec1n nhi\u1ec7t v\u00e0 b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t kh\u1ecfi t\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 cao.<\/p>\n<h2>L\u00fd thuy\u1ebft c\u0103n b\u1ea3n<\/h2>\n<p>L\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t c\u00f3 ch\u1ee9c n\u0103ng ch\u00ednh l\u00e0 gi\u1ea3m thi\u1ec3u s\u1ef1 trao \u0111\u1ed5i nhi\u1ec7t gi\u1eefa hai b\u1ec1 m\u1eb7t ho\u1eb7c gi\u1eefa b\u1ec1 m\u1eb7t v\u00e0 m\u00f4i tr\u01b0\u1eddng xung quanh. Hi\u1ec7u su\u1ea5t nhi\u1ec7t c\u1ee7a l\u1edbp ph\u1ee7 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi hai y\u1ebfu t\u1ed1 ch\u00ednh:<\/p>\n<ul>\n<li>\u0110\u1ed9 d\u1eabn nhi\u1ec7t (k): \u0110\u1ea1i l\u01b0\u1ee3ng ch\u1ec9 s\u1ef1 kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t qua v\u1eadt li\u1ec7u.<\/li>\n<li>\u0110\u1ed9 c\u00e1ch nhi\u1ec7t (R): \u0110\u1ea1i l\u01b0\u1ee3ng \u0111o l\u01b0\u1eddng s\u1ef1 c\u1ea3n tr\u1edf qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t.<\/li>\n<\/ul>\n<p>Hi\u1ec7u su\u1ea5t c\u1ee7a l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 b\u1eb1ng c\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n:<\/p>\n<p><i>R = \\frac{d}{k}<\/i><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><i>R<\/i>: \u0110\u1ed9 c\u00e1ch nhi\u1ec7t (m\u00b2K\/W)<\/li>\n<li><i>d<\/i>: \u0110\u1ed9 d\u00e0y l\u1edbp ph\u1ee7 (m)<\/li>\n<li><i>k<\/i>: H\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t (W\/mK)<\/li>\n<\/ul>\n<h2>\u1ee8ng d\u1ee5ng th\u1ef1c ti\u1ec5n<\/h2>\n<p>L\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau, t\u1eeb c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng cho \u0111\u1ebfn c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t c\u00f4ng nghi\u1ec7p. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 ti\u00eau bi\u1ec3u:<\/p>\n<h3>C\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng<\/h3>\n<p>Trong c\u00e1c c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng, l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean t\u01b0\u1eddng, m\u00e1i, v\u00e0 s\u00e0n nh\u00e0 \u0111\u1ec3 gi\u1ea3m thi\u1ec3u nhi\u1ec7t \u0111\u1ed9 b\u00ean trong v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng cho h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed.<\/p>\n<ul>\n<li>T\u01b0\u1eddng v\u00e0 m\u00e1i nh\u00e0 c\u00e1ch nhi\u1ec7t b\u1eb1ng b\u00f4ng kho\u00e1ng ho\u1eb7c polystyrene \u0111\u1ec3 gi\u1ea3m hao ph\u00ed nhi\u1ec7t.<\/li>\n<li>S\u1eed d\u1ee5ng l\u1edbp ph\u1ee7 g\u01b0\u01a1ng ph\u1ea3n chi\u1ebfu tr\u00ean k\u00ednh c\u1eeda s\u1ed5 \u0111\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ef1 truy\u1ec1n nhi\u1ec7t t\u1eeb m\u1eb7t tr\u1eddi.<\/li>\n<\/ul>\n<h3>Ng\u00e0nh c\u00f4ng nghi\u1ec7p<\/h3>\n<p>Trong c\u00f4ng nghi\u1ec7p, l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb kh\u1ecfi nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 gi\u1ea3m thi\u1ec3u hao ph\u00ed n\u0103ng l\u01b0\u1ee3ng trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n<ul>\n<li>L\u1edbp ph\u1ee7 g\u1ed1m s\u1ee9 tr\u00ean turbine kh\u00ed \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao m\u00e0 kh\u00f4ng b\u1ecb h\u01b0 h\u1ecfng.<\/li>\n<li>\u1ed0ng d\u1eabn nhi\u1ec7t v\u00e0 thi\u1ebft b\u1ecb trao \u0111\u1ed5i nhi\u1ec7t \u0111\u01b0\u1ee3c ph\u1ee7 l\u1edbp c\u00e1ch nhi\u1ec7t nh\u1eb1m gi\u1ea3m thi\u1ec3u s\u1ef1 m\u1ea5t m\u00e1t nhi\u1ec7t.<\/li>\n<\/ul>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Hi\u1ec7u su\u1ea5t c\u1ee7a l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c thi\u1ebft b\u1ecb kh\u1ecfi t\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 cao. B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 c\u00e1c \u0111\u1eb7c t\u00ednh v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t, ta c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec7u su\u1ea5t c\u1ee7a l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t: Kh\u00e1m ph\u00e1 c\u00e1ch l\u1edbp ph\u1ee7 ch\u1eafn nhi\u1ec7t ho\u1ea1t \u0111\u1ed9ng, c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t n\u0103ng l\u01b0\u1ee3ng v\u00e0 b\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t kh\u1ecfi t\u00e1c \u0111\u1ed9ng nhi\u1ec7t.<\/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\/ 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