{"id":700540,"date":"2024-10-16T13:47:24","date_gmt":"2024-10-16T12:47:24","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=700540"},"modified":"2024-10-16T13:47:24","modified_gmt":"2024-10-16T12:47:24","slug":"truyen-nhiet-trong-may-lam-mat-bay-hoi","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/truyen-nhiet-trong-may-lam-mat-bay-hoi\/","title":{"rendered":"Truy\u1ec1n nhi\u1ec7t trong m\u00e1y l\u00e0m m\u00e1t bay h\u01a1i"},"content":{"rendered":"

Truy\u1ec1n nhi\u1ec7t trong m\u00e1y l\u00e0m m\u00e1t bay h\u01a1i: Gi\u1ea3i th\u00edch qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p d\u1ee5ng k\u1ef9 thu\u1eadt n\u00e0y \u0111\u1ec3 l\u00e0m m\u00e1t kh\u00f4ng gian hi\u1ec7u qu\u1ea3.<\/p>\n

\"Truy\u1ec1n<\/p>\n

Truy\u1ec1n Nhi\u1ec7t Trong M\u00e1y L\u00e0m M\u00e1t Bay H\u01a1i<\/h2>\n

M\u00e1y l\u00e0m m\u00e1t bay h\u01a1i (Evaporative Cooler) l\u00e0 thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng hi\u1ec7n t\u01b0\u1ee3ng bay h\u01a1i c\u1ee7a n\u01b0\u1edbc \u0111\u1ec3 l\u00e0m m\u00e1t kh\u00f4ng kh\u00ed. Qu\u00e1 tr\u00ecnh l\u00e0m m\u00e1t bay h\u01a1i d\u1ef1a tr\u00ean nguy\u00ean l\u00fd truy\u1ec1n nhi\u1ec7t v\u00e0 s\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i c\u1ee7a n\u01b0\u1edbc t\u1eeb d\u1ea1ng l\u1ecfng sang h\u01a1i.<\/p>\n

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

Khi n\u01b0\u1edbc bay h\u01a1i, n\u00f3 h\u1ea5p th\u1ee5 nhi\u1ec7t t\u1eeb m\u00f4i tr\u01b0\u1eddng xung quanh, gi\u00fap gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 c\u1ee7a kh\u00f4ng kh\u00ed. Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y l\u00e0m m\u00e1t bay h\u01a1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 qua c\u00e1c b\u01b0\u1edbc sau:<\/p>\n

<\/p>\n

  • Kh\u00f4ng kh\u00ed n\u00f3ng \u0111\u01b0\u1ee3c h\u00fat v\u00e0o m\u00e1y qua b\u1ed9 l\u1ecdc \u1ea9m \u01b0\u1edbt.<\/li>\n
  • N\u01b0\u1edbc t\u1eeb b\u1ec3 ch\u1ee9a \u0111\u01b0\u1ee3c b\u01a1m l\u00ean v\u00e0 th\u1ea5m qua b\u1ed9 l\u1ecdc, l\u00e0m \u01b0\u1edbt b\u1ec1 m\u1eb7t b\u1ed9 l\u1ecdc.<\/li>\n
  • Kh\u00f4ng kh\u00ed \u0111i qua b\u1ed9 l\u1ecdc v\u00e0 ti\u1ebfp x\u00fac v\u1edbi n\u01b0\u1edbc tr\u00ean b\u1ec1 m\u1eb7t b\u1ed9 l\u1ecdc.<\/li>\n
  • N\u01b0\u1edbc b\u1eaft \u0111\u1ea7u bay h\u01a1i, h\u1ea5p th\u1ee5 nhi\u1ec7t t\u1eeb kh\u00f4ng kh\u00ed n\u00f3ng v\u00e0 l\u00e0m gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 c\u1ee7a kh\u00f4ng kh\u00ed.<\/li>\n
  • Kh\u00f4ng kh\u00ed m\u00e1t \u0111\u01b0\u1ee3c th\u1ed5i ra ngo\u00e0i \u0111\u1ec3 l\u00e0m m\u00e1t kh\u00f4ng gian xung quanh.<\/li>\n

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

    C\u00e1c Y\u1ebfu T\u1ed1 \u1ea2nh H\u01b0\u1edfng \u0110\u1ebfn Hi\u1ec7u Qu\u1ea3 L\u00e0m M\u00e1t<\/h2>\n

    C\u00f3 nhi\u1ec1u y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u qu\u1ea3 l\u00e0m m\u00e1t c\u1ee7a m\u00e1y l\u00e0m m\u00e1t bay h\u01a1i, bao g\u1ed3m:<\/p>\n

    <\/p>\n

  • Nhi\u1ec7t \u0110\u1ed9 M\u00f4i Tr\u01b0\u1eddng:<\/b> Hi\u1ec7u qu\u1ea3 l\u00e0m m\u00e1t t\u0103ng khi nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed \u0111\u1ea7u v\u00e0o cao.<\/li>\n
  • \u0110\u1ed9 \u1ea8m:<\/b> \u0110\u1ed9 \u1ea9m th\u1ea5p s\u1ebd l\u00e0m t\u0103ng hi\u1ec7u qu\u1ea3 l\u00e0m m\u00e1t v\u00ec n\u01b0\u1edbc d\u1ec5 bay h\u01a1i h\u01a1n.<\/li>\n
  • T\u1ed1c \u0110\u1ed9 Kh\u00f4ng Kh\u00ed:<\/b> T\u1ed1c \u0111\u1ed9 kh\u00f4ng kh\u00ed cao l\u00e0m gia t\u0103ng l\u01b0u th\u00f4ng kh\u00f4ng kh\u00ed, t\u0103ng hi\u1ec7u qu\u1ea3 l\u00e0m m\u00e1t.<\/li>\n
  • Di\u1ec7n T\u00edch B\u1ec1 M\u1eb7t Bay H\u01a1i:<\/b> Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t b\u1ed9 l\u1ecdc l\u1edbn h\u01a1n gi\u00fap t\u0103ng kh\u1ea3 n\u0103ng bay h\u01a1i, c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 l\u00e0m m\u00e1t.<\/li>\n

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

    C\u00f4ng Th\u1ee9c T\u00ednh To\u00e1n<\/h2>\n

    Hi\u1ec7u su\u1ea5t l\u00e0m m\u00e1t c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t bay h\u01a1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u01b0\u1edbc l\u01b0\u1ee3ng b\u1eb1ng c\u00e1c c\u00f4ng th\u1ee9c li\u00ean quan \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m. M\u1ed9t c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n \u0111\u1ec3 t\u00ednh to\u00e1n s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 l\u00e0:<\/p>\n

    \\( \\Delta T = T_{db,in} – T_{db,out} \\)<\/p>\n

    Trong \u0111\u00f3:<\/p>\n

    <\/p>\n

  • \\( \\Delta T \\): S\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9.<\/li>\n
  • \\( T_{db,in} \\): Nhi\u1ec7t \u0111\u1ed9 b\u1ea7u kh\u00f4 c\u1ee7a kh\u00f4ng kh\u00ed \u0111\u1ea7u v\u00e0o.<\/li>\n
  • \\( T_{db,out} \\): Nhi\u1ec7t \u0111\u1ed9 b\u1ea7u kh\u00f4 c\u1ee7a kh\u00f4ng kh\u00ed \u0111\u1ea7u ra.<\/li>\n

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

    Ngo\u00e0i ra, hi\u1ec7u n\u0103ng l\u00e0m m\u00e1t (Cooling efficiency) c\u1ee7a m\u00e1y l\u00e0m m\u00e1t bay h\u01a1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a tr\u00ean nhi\u1ec7t \u0111\u1ed9 b\u1ea7u \u01b0\u1edbt (wet bulb temperature) c\u1ee7a kh\u00f4ng kh\u00ed \u0111\u1ea7u v\u00e0o nh\u01b0 sau:<\/p>\n

    \\( \\eta = \\frac{T_{db,in} – T_{db,out}}{T_{db,in} – T_{wb}} \\times 100\\% \\)<\/p>\n

    Trong \u0111\u00f3:<\/p>\n

    <\/p>\n

  • \\( \\eta \\): Hi\u1ec7u n\u0103ng l\u00e0m m\u00e1t.<\/li>\n
  • \\( T_{wb} \\): Nhi\u1ec7t \u0111\u1ed9 b\u1ea7u \u01b0\u1edbt c\u1ee7a kh\u00f4ng kh\u00ed \u0111\u1ea7u v\u00e0o.<\/li>\n

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

    \u1ee8ng D\u1ee5ng Th\u1ef1c Ti\u1ec5n<\/h2>\n

    M\u00e1y l\u00e0m m\u00e1t bay h\u01a1i th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf c\u00e1c khu v\u1ef1c c\u00f3 kh\u00ed h\u1eadu kh\u00f4 n\u00f3ng, ch\u1eb3ng h\u1ea1n nh\u01b0 mi\u1ec1n t\u00e2y Hoa K\u1ef3, \u00dac v\u00e0 Trung \u0110\u00f4ng. M\u00e1y l\u00e0m m\u00e1t bay h\u01a1i ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng h\u01a1n so v\u1edbi m\u00e1y \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed truy\u1ec1n th\u1ed1ng v\u00e0 c\u00f2n gi\u00fap c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng kh\u00f4ng kh\u00ed b\u1eb1ng c\u00e1ch t\u0103ng \u0111\u1ed9 \u1ea9m.<\/p>\n

    Trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p, m\u00e1y l\u00e0m m\u00e1t bay h\u01a1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m m\u00e1t nh\u00e0 x\u01b0\u1edfng, nh\u00e0 m\u00e1y v\u00e0 c\u00e1c kh\u00f4ng gian l\u1edbn kh\u00e1c. Nh\u1edd chi ph\u00ed v\u1eadn h\u00e0nh th\u1ea5p v\u00e0 hi\u1ec7u qu\u1ea3 cao, m\u00e1y l\u00e0m m\u00e1t bay h\u01a1i l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p thay th\u1ebf \u0111\u00e1ng xem x\u00e9t trong vi\u1ec7c l\u00e0m m\u00e1t kh\u00f4ng gian l\u1edbn.<\/p>\n

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

    M\u00e1y l\u00e0m m\u00e1t bay h\u01a1i l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p l\u00e0m m\u00e1t hi\u1ec7u qu\u1ea3 v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng, \u0111\u1eb7c bi\u1ec7t ph\u00f9 h\u1ee3p cho c\u00e1c khu v\u1ef1c c\u00f3 kh\u00ed h\u1eadu kh\u00f4 n\u00f3ng. B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd truy\u1ec1n nhi\u1ec7t v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u qu\u1ea3 l\u00e0m m\u00e1t, ch\u00fang ta c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a h\u1ec7 th\u1ed1ng \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u qu\u1ea3 cao nh\u1ea5t.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Truy\u1ec1n nhi\u1ec7t trong m\u00e1y l\u00e0m m\u00e1t bay h\u01a1i: Gi\u1ea3i th\u00edch qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p d\u1ee5ng k\u1ef9 thu\u1eadt n\u00e0y \u0111\u1ec3 l\u00e0m m\u00e1t kh\u00f4ng gian hi\u1ec7u qu\u1ea3.<\/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":"\nTruy\u1ec1n nhi\u1ec7t trong m\u00e1y l\u00e0m m\u00e1t bay h\u01a1i<\/title>\n<meta name=\"description\" content=\"Truy\u1ec1n nhi\u1ec7t trong m\u00e1y l\u00e0m m\u00e1t bay h\u01a1i: Gi\u1ea3i th\u00edch qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p d\u1ee5ng k\u1ef9 thu\u1eadt n\u00e0y \u0111\u1ec3 l\u00e0m m\u00e1t kh\u00f4ng gian hi\u1ec7u qu\u1ea3.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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