{"id":705276,"date":"2024-11-25T01:32:21","date_gmt":"2024-11-25T00:32:21","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=705276"},"modified":"2024-11-25T01:32:21","modified_gmt":"2024-11-25T00:32:21","slug":"bo-trao-doi-nhiet-dong-cheo-dac-diem-va-ung-dung-trong-cac-nganh-cong-nghiep","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/bo-trao-doi-nhiet-dong-cheo-dac-diem-va-ung-dung-trong-cac-nganh-cong-nghiep\/","title":{"rendered":"B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o | \u0110\u1eb7c \u0111i\u1ec3m v\u00e0 \u1ee8ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p"},"content":{"rendered":"<p class=\"sidekick\">B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o: T\u00ecm hi\u1ec3u \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 h\u00f3a ch\u1ea5t, th\u1ef1c ph\u1ea9m, v\u00e0 n\u0103ng l\u01b0\u1ee3ng. Gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/bo_trao_doi_nhiet_dong_cheo_dac_diem_va_ung_dung_trong_cac_nganh_cong_nghiep.png\" alt=\"B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o | \u0110\u1eb7c \u0111i\u1ec3m v\u00e0 \u1ee8ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o | \u0110\u1eb7c \u0111i\u1ec3m v\u00e0 \u1ee8ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p<\/h2>\n<p>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb kh\u00f4ng th\u1ec3 thi\u1ebfu trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p, gi\u00fap truy\u1ec1n nhi\u1ec7t gi\u1eefa c\u00e1c ch\u1ea5t l\u01b0u (d\u00f2ng ch\u1ea3y) m\u00e0 kh\u00f4ng l\u00e0m ch\u00fang b\u1ecb tr\u1ed9n l\u1eabn. Trong s\u1ed1 c\u00e1c lo\u1ea1i b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t, b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o (cross-flow heat exchanger) n\u1ed5i b\u1eadt v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng \u0111a d\u1ea1ng. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a lo\u1ea1i thi\u1ebft b\u1ecb n\u00e0y.<\/p>\n<h2>\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o<\/h2>\n<p><u1><\/p>\n<li><b>C\u1ea5u t\u1ea1o:<\/b> B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o bao g\u1ed3m c\u00e1c t\u1ea5m ho\u1eb7c \u1ed1ng d\u1eabn, trong \u0111\u00f3 hai ch\u1ea5t l\u1ecfng (ho\u1eb7c kh\u00ed) l\u01b0u th\u00f4ng vu\u00f4ng g\u00f3c v\u1edbi nhau. T\u1ea5m ng\u0103n c\u00e1ch gi\u1eefa hai d\u00f2ng ch\u1ea5t l\u01b0u n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb kim lo\u1ea1i c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t cao nh\u01b0 \u0111\u1ed3ng, nh\u00f4m, ho\u1eb7c th\u00e9p kh\u00f4ng g\u1ec9.<\/li>\n<li><b>Hi\u1ec7u su\u1ea5t:<\/b> Hi\u1ec7u su\u1ea5t truy\u1ec1n nhi\u1ec7t c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o cao h\u01a1n so v\u1edbi b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng song song (parallel-flow heat exchanger) nh\u01b0ng th\u1ea5p h\u01a1n so v\u1edbi b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ng\u01b0\u1ee3c chi\u1ec1u (counter-flow heat exchanger).<\/li>\n<li><b>K\u00edch th\u01b0\u1edbc v\u00e0 thi c\u00f4ng:<\/b> Thi\u1ebft k\u1ebf c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o th\u01b0\u1eddng nh\u1ecf g\u1ecdn, d\u1ec5 d\u00e0ng b\u1ea3o tr\u00ec v\u00e0 v\u1ec7 sinh. H\u1ea1n ch\u1ebf l\u1edbn nh\u1ea5t c\u1ee7a c\u1ea5u tr\u00fac n\u00e0y l\u00e0 vi\u1ec7c c\u1ea7n ki\u1ec3m so\u00e1t t\u1ed1t \u0111\u1ec3 tr\u00e1nh t\u1eafc ngh\u1ebdn v\u00e0 s\u1ef1 m\u00e0i m\u00f2n c\u1ee7a ch\u1ea5t l\u01b0u.<\/li>\n<li><b>Ph\u01b0\u01a1ng tr\u00ecnh truy\u1ec1n nhi\u1ec7t:<\/b> Hi\u1ec7u su\u1ea5t c\u1ee7a thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng ph\u01b0\u01a1ng tr\u00ecnh ch\u00ednh: <br \/> \\( Q = U \\cdot A \\cdot (T_{lm}) \\)<br \/>\n    Trong \u0111\u00f3:<\/p>\n<ul>\n<li>Q: L\u01b0\u1ee3ng nhi\u1ec7t chuy\u1ec3n \u0111\u1ed5i (W)<\/li>\n<li>U: H\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t t\u1ed5ng c\u1ed9ng (W\/m\u00b2K)<\/li>\n<li>A: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t trao \u0111\u1ed5i nhi\u1ec7t (m\u00b2)<\/li>\n<li>T<sub>lm<\/sub>: Nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh logarit (K)<\/li>\n<\/ul>\n<\/li>\n<p><\/u1><\/p>\n<h2>\u1ee8ng d\u1ee5ng c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p<\/h2>\n<p>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c nh\u1edd \u0111\u1eb7c t\u00ednh hi\u1ec7u qu\u1ea3 v\u00e0 thi\u1ebft k\u1ebf linh ho\u1ea1t.<\/p>\n<p><u1><\/p>\n<li><b>C\u00f4ng nghi\u1ec7p n\u0103ng l\u01b0\u1ee3ng:<\/b> Trong c\u00e1c nh\u00e0 m\u00e1y \u0111i\u1ec7n, b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o gi\u00fap t\u0103ng hi\u1ec7u su\u1ea5t s\u1eed d\u1ee5ng nhi\u1ec7t, gi\u1ea3m ti\u00eau hao nhi\u00ean li\u1ec7u.<\/li>\n<li><b>C\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t:<\/b> Thi\u1ebft b\u1ecb n\u00e0y gi\u00fap ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 trong qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc, \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3 s\u1ea3n xu\u1ea5t.<\/li>\n<li><b>C\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m:<\/b> B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00e1c quy tr\u00ecnh l\u00e0m m\u00e1t, \u0111un n\u00f3ng, v\u00e0 thanh tr\u00f9ng s\u1ea3n ph\u1ea9m th\u1ef1c ph\u1ea9m, gi\u1eef cho ph\u1ea9m ch\u1ea5t v\u00e0 h\u01b0\u01a1ng v\u1ecb c\u1ee7a s\u1ea3n ph\u1ea9m lu\u00f4n \u1ed5n \u0111\u1ecbnh.<\/li>\n<li><b>C\u00f4ng nghi\u1ec7p HVAC:<\/b> Trong h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed v\u00e0 th\u00f4ng gi\u00f3, b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o gi\u00fap ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng b\u1eb1ng vi\u1ec7c tham gia v\u00e0o qu\u00e1 tr\u00ecnh thu h\u1ed3i nhi\u1ec7t.<\/li>\n<p><\/u1><\/p>\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng \u0111i\u1ec3m n\u1ed5i b\u1eadt v\u1ec1 b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n c\u1ee7a ch\u00fang. Nh\u1edd v\u00e0o kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t hi\u1ec7u qu\u1ea3 v\u00e0 kh\u1ea3 n\u0103ng \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i, thi\u1ebft b\u1ecb n\u00e0y \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh c\u00f4ng nghi\u1ec7p.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o: T\u00ecm hi\u1ec3u \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 h\u00f3a ch\u1ea5t, th\u1ef1c ph\u1ea9m, v\u00e0 n\u0103ng l\u01b0\u1ee3ng. Gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng.<\/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>B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o | \u0110\u1eb7c \u0111i\u1ec3m v\u00e0 \u1ee8ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p<\/title>\n<meta name=\"description\" content=\"B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t d\u00f2ng ch\u00e9o: T\u00ecm hi\u1ec3u \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 \u1ee9ng d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 h\u00f3a ch\u1ea5t, th\u1ef1c ph\u1ea9m, v\u00e0 n\u0103ng l\u01b0\u1ee3ng. 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