{"id":710829,"date":"2024-10-22T01:56:26","date_gmt":"2024-10-22T00:56:26","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=710829"},"modified":"2024-10-22T01:56:26","modified_gmt":"2024-10-22T00:56:26","slug":"cach-bo-trao-doi-nhiet-chuyen-nhiet-nang","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/cach-bo-trao-doi-nhiet-chuyen-nhiet-nang\/","title":{"rendered":"C\u00e1ch b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t chuy\u1ec3n nhi\u1ec7t n\u0103ng"},"content":{"rendered":"

C\u00e1ch b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t chuy\u1ec3n nhi\u1ec7t n\u0103ng: t\u00ecm hi\u1ec3u c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t trong vi\u1ec7c chuy\u1ec3n nhi\u1ec7t n\u0103ng gi\u1eefa hai ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed.<\/p>\n

\"C\u00e1ch<\/p>\n

C\u00e1ch B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t Chuy\u1ec3n Nhi\u1ec7t N\u0103ng<\/h2>\n

Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u00e0 \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y, vi\u1ec7c chuy\u1ec3n nhi\u1ec7t n\u0103ng t\u1eeb n\u01a1i n\u00e0y sang n\u01a1i kh\u00e1c r\u1ea5t quan tr\u1ecdng. M\u1ed9t trong nh\u1eefng thi\u1ebft b\u1ecb ph\u1ed5 bi\u1ebfn nh\u1ea5t th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 n\u00e0y l\u00e0 b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t. B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t gi\u00fap chuy\u1ec3n nhi\u1ec7t t\u1eeb m\u1ed9t ngu\u1ed3n n\u00f3ng sang m\u1ed9t ngu\u1ed3n l\u1ea1nh m\u00e0 kh\u00f4ng c\u1ea7n hai ngu\u1ed3n ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi nhau. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t th\u00f4ng qua c\u1ea5u t\u1ea1o v\u00e0 nguy\u00ean l\u00fd l\u00e0m vi\u1ec7c c\u1ee7a n\u00f3.<\/p>\n

Nguy\u00ean L\u00fd Ho\u1ea1t \u0110\u1ed9ng<\/h2>\n

B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd truy\u1ec1n nhi\u1ec7t, l\u00e0 qu\u00e1 tr\u00ecnh m\u00e0 nhi\u1ec7t n\u0103ng \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1eeb v\u1eadt c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n sang v\u1eadt c\u00f3 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n. C\u00f3 ba ph\u01b0\u01a1ng th\u1ee9c truy\u1ec1n nhi\u1ec7t ch\u00ednh:<\/p>\n

<\/p>\n

  • Truy\u1ec1n D\u1eabn (Conduction):<\/b> Nhi\u1ec7t n\u0103ng chuy\u1ec3n qua v\u1eadt ch\u1ea5t, t\u1eeb ph\u00e2n t\u1eed n\u00e0y sang ph\u00e2n t\u1eed kh\u00e1c.<\/li>\n
  • \u0110\u1ed1i L\u01b0u (Convection):<\/b> Nhi\u1ec7t n\u0103ng chuy\u1ec3n do s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed.<\/li>\n
  • B\u1ee9c X\u1ea1 (Radiation):<\/b> Nhi\u1ec7t n\u0103ng \u0111\u01b0\u1ee3c truy\u1ec1n qua kh\u00f4ng gian d\u01b0\u1edbi d\u1ea1ng s\u00f3ng \u0111i\u1ec7n t\u1eeb.<\/li>\n

    <\/u1><\/p>\n

    C\u00e1c b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t ch\u1ee7 y\u1ebfu s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n d\u1eabn v\u00e0 \u0111\u1ed1i l\u01b0u \u0111\u1ec3 chuy\u1ec3n nhi\u1ec7t n\u0103ng. V\u00ed d\u1ee5, trong m\u1ed9t b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t \u1ed1ng ch\u00f9m, ch\u1ea5t l\u1ecfng n\u00f3ng ch\u1ea3y qua c\u00e1c \u1ed1ng, truy\u1ec1n nhi\u1ec7t qua th\u00e0nh \u1ed1ng t\u1edbi ch\u1ea5t l\u1ecfng l\u1ea1nh b\u00ean ngo\u00e0i ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n

    C\u00e1c Lo\u1ea1i B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t<\/h2>\n

    D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t ph\u1ed5 bi\u1ebfn:<\/p>\n

    <\/p>\n

  • B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t T\u1ea5m (Plate Heat Exchanger):<\/b> S\u1eed d\u1ee5ng c\u00e1c t\u1ea5m kim lo\u1ea1i m\u1ecfng \u0111\u01b0\u1ee3c x\u1ebfp ch\u1ed3ng l\u00ean nhau, t\u1ea1o th\u00e0nh nhi\u1ec1u k\u00eanh cho ch\u1ea5t l\u1ecfng n\u00f3ng v\u00e0 l\u1ea1nh ch\u1ea3y qua. C\u1ea5u tr\u00fac n\u00e0y gi\u00fap t\u0103ng di\u1ec7n t\u00edch ti\u1ebfp x\u00fac v\u00e0 hi\u1ec7u su\u1ea5t trao \u0111\u1ed5i nhi\u1ec7t.<\/li>\n
  • B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t \u1ed0ng Ch\u00f9m (Shell and Tube Heat Exchanger):<\/b> Bao g\u1ed3m m\u1ed9t c\u00e1i v\u1ecf l\u1edbn ch\u1ee9a nhi\u1ec1u \u1ed1ng nh\u1ecf b\u00ean trong. M\u1ed9t ch\u1ea5t l\u1ecfng ch\u1ea3y qua c\u00e1c \u1ed1ng, trong khi ch\u1ea5t l\u1ecfng th\u1ee9 hai ch\u1ea3y quanh c\u00e1c \u1ed1ng b\u00ean trong v\u1ecf l\u1edbn.<\/li>\n
  • B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t H\u01a1i N\u01b0\u1edbc (Air Cooled Heat Exchanger):<\/b> S\u1eed d\u1ee5ng kh\u00f4ng kh\u00ed l\u00e0m m\u00f4i ch\u1ea5t \u0111\u1ec3 l\u00e0m m\u00e1t ch\u1ea5t l\u1ecfng n\u00f3ng. Th\u01b0\u1eddng th\u1ea5y trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a v\u00e0 qu\u1ea1t l\u00e0m m\u00e1t m\u00e1y m\u00f3c.<\/li>\n

    <\/u1><\/p>\n

    Hi\u1ec7u Su\u1ea5t C\u1ee7a B\u1ed9 Trao \u0110\u1ed5i Nhi\u1ec7t<\/h2>\n

    Hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1:<\/p>\n

    <\/p>\n

  • Di\u1ec7n T\u00edch B\u1ec1 M\u1eb7t:<\/b> Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t l\u1edbn th\u01b0\u1eddng gi\u00fap t\u0103ng kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t.<\/li>\n
  • Ch\u00eanh L\u1ec7ch Nhi\u1ec7t \u0110\u1ed9 (\u0394T):<\/b> Ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa hai ch\u1ea5t l\u1ecfng c\u00e0ng l\u1edbn, qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t c\u00e0ng hi\u1ec7u qu\u1ea3.<\/li>\n
  • Lo\u1ea1i Ch\u1ea5t L\u1ecfng:<\/b> \u0110\u1eb7c t\u00ednh v\u1eadt l\u00fd c\u1ee7a ch\u1ea5t l\u1ecfng nh\u01b0 \u0111\u1ed9 d\u1eabn nhi\u1ec7t, \u0111\u1ed9 nh\u1edbt c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t trao \u0111\u1ed5i nhi\u1ec7t.<\/li>\n
  • Thi\u1ebft K\u1ebf:<\/b> C\u1ea5u tr\u00fac v\u00e0 v\u1eadt li\u1ec7u c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn t\u1edbi kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t.<\/li>\n

    <\/u1><\/p>\n

    K\u1ebft Lu\u1eadn<\/h2>\n

    B\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb quan tr\u1ecdng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt, t\u1eeb h\u1ec7 th\u1ed1ng s\u01b0\u1edfi \u1ea5m trong nh\u00e0 \u0111\u1ebfn c\u00e1c quy tr\u00ecnh c\u00f4ng nghi\u1ec7p ph\u1ee9c t\u1ea1p. Hi\u1ec3u r\u00f5 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t s\u1ebd gi\u00fap ch\u00fang ta \u1ee9ng d\u1ee5ng ch\u00fang m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 trong th\u1ef1c t\u1ebf.<\/p>\n","protected":false},"excerpt":{"rendered":"

    C\u00e1ch b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t chuy\u1ec3n nhi\u1ec7t n\u0103ng: t\u00ecm hi\u1ec3u c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t trong vi\u1ec7c chuy\u1ec3n nhi\u1ec7t n\u0103ng gi\u1eefa hai ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed.<\/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":"\nC\u00e1ch b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t chuy\u1ec3n nhi\u1ec7t n\u0103ng<\/title>\n<meta name=\"description\" content=\"C\u00e1ch b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t chuy\u1ec3n nhi\u1ec7t n\u0103ng: t\u00ecm hi\u1ec3u c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t trong vi\u1ec7c chuy\u1ec3n nhi\u1ec7t n\u0103ng gi\u1eefa hai ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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