{"id":708072,"date":"2024-08-21T02:10:25","date_gmt":"2024-08-21T01:10:25","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=708072"},"modified":"2024-08-21T02:10:25","modified_gmt":"2024-08-21T01:10:25","slug":"nguyen-ly-gia-nhiet-doi-luu-duoc-giai-thich","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/nguyen-ly-gia-nhiet-doi-luu-duoc-giai-thich\/","title":{"rendered":"Nguy\u00ean L\u00fd Gia Nhi\u1ec7t \u0110\u1ed1i L\u01b0u \u0110\u01b0\u1ee3c Gi\u1ea3i Th\u00edch"},"content":{"rendered":"

Nguy\u00ean l\u00fd gia nhi\u1ec7t \u0111\u1ed1i l\u01b0u \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch: t\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t l\u01b0u chuy\u1ec3n trong kh\u00f4ng kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng \u0111\u1ec3 l\u00e0m n\u00f3ng \u0111\u1ec1u c\u00e1c v\u1eadt th\u1ec3 v\u00e0 kh\u00f4ng gian.<\/p>\n

\"Nguy\u00ean<\/p>\n

Nguy\u00ean L\u00fd Gia Nhi\u1ec7t \u0110\u1ed1i L\u01b0u \u0110\u01b0\u1ee3c Gi\u1ea3i Th\u00edch<\/h2>\n

Gia nhi\u1ec7t \u0111\u1ed1i l\u01b0u l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t. N\u00f3 x\u1ea3y ra khi nhi\u1ec7t \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb m\u1ed9t b\u1ec1 m\u1eb7t n\u00f3ng \u0111\u1ebfn ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed l\u01b0u th\u00f4ng, c\u0169ng nh\u01b0 t\u1eeb ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed \u0111\u1ebfn b\u1ec1 m\u1eb7t l\u1ea1nh. \u0110\u00e2y l\u00e0 c\u01a1 ch\u1ebf truy\u1ec1n nhi\u1ec7t ch\u00ednh trong nhi\u1ec1u quy tr\u00ecnh c\u00f4ng nghi\u1ec7p v\u00e0 h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh, s\u01b0\u1edfi \u1ea5m.<\/p>\n

Kh\u00e1i Ni\u1ec7m C\u01a1 B\u1ea3n v\u1ec1 \u0110\u1ed1i L\u01b0u<\/h2>\n

\u0110\u1ed1i l\u01b0u<\/strong> l\u00e0 qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t x\u1ea3y ra trong ch\u1ea5t l\u1ecfng v\u00e0 kh\u00ed. N\u00f3 bao g\u1ed3m hai lo\u1ea1i ch\u00ednh:<\/p>\n

<\/p>\n

  • \u0110\u1ed1i l\u01b0u t\u1ef1 nhi\u00ean<\/strong>: X\u1ea3y ra khi chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed l\u00e0 do s\u1ef1 ch\u00eanh l\u1ec7ch v\u1ec1 m\u1eadt \u0111\u1ed9 t\u1ea1o b\u1edfi s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9.<\/li>\n
  • \u0110\u1ed1i l\u01b0u c\u01b0\u1ee1ng b\u1ee9c<\/strong>: X\u1ea3y ra khi c\u00f3 ngo\u1ea1i l\u1ef1c t\u00e1c \u0111\u1ed9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 qu\u1ea1t ho\u1eb7c b\u01a1m \u0111\u1eb7t trong h\u1ec7 th\u1ed1ng \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng l\u01b0u th\u00f4ng ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed.<\/li>\n

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

    Nguy\u00ean L\u00fd Ho\u1ea1t \u0110\u1ed9ng C\u01a1 B\u1ea3n<\/h2>\n

    Gia nhi\u1ec7t \u0111\u1ed1i l\u01b0u d\u1ef1a tr\u00ean nguy\u00ean l\u00fd r\u1eb1ng ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed \u1ea5m nh\u1eb9 h\u01a1n n\u00ean s\u1ebd di chuy\u1ec3n l\u00ean tr\u00ean, c\u00f2n ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed l\u1ea1nh h\u01a1n s\u1ebd di chuy\u1ec3n xu\u1ed1ng d\u01b0\u1edbi. S\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa c\u00e1c ph\u1ea7n ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed d\u1eabn \u0111\u1ebfn s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a ch\u00fang v\u00e0 gi\u00fap lan truy\u1ec1n nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec1u kh\u1eafp kh\u00f4ng gian.<\/p>\n

    Ph\u01b0\u01a1ng Tr\u00ecnh C\u0103n B\u1ea3n<\/h2>\n

    Qu\u00e1 tr\u00ecnh gia nhi\u1ec7t \u0111\u1ed1i l\u01b0u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 b\u1eb1ng ph\u01b0\u01a1ng tr\u00ecnh Newton v\u1ec1 \u0111\u1ed1i l\u01b0u nhi\u1ec7t:<\/p>\n

    q = h * A * (T_s – T_f)<\/strong><\/p>\n

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

    <\/p>\n

  • q<\/strong>: L\u01b0\u1ee3ng nhi\u1ec7t truy\u1ec1n (W, watt)<\/li>\n
  • h<\/strong>: H\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i l\u01b0u (W\/m2<\/sup>*K)<\/li>\n
  • A<\/strong>: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t truy\u1ec1n nhi\u1ec7t (m2<\/sup>)<\/li>\n
  • T_s<\/strong>: Nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t (K ho\u1eb7c \u00b0C)<\/li>\n
  • T_f<\/strong>: Nhi\u1ec7t \u0111\u1ed9 ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed (K ho\u1eb7c \u00b0C)<\/li>\n

    <\/o1><\/p>\n

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

    Gia nhi\u1ec7t \u0111\u1ed1i l\u01b0u c\u00f3 vai tr\u00f2 r\u1ea5t quan tr\u1ecdng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng v\u00e0 quy tr\u00ecnh c\u00f4ng nghi\u1ec7p:<\/p>\n

    <\/p>\n

  • H\u1ec7 th\u1ed1ng s\u01b0\u1edfi \u1ea5m v\u00e0 l\u00e0m l\u1ea1nh:<\/strong> Gia nhi\u1ec7t \u0111\u1ed1i l\u01b0u \u0111\u01b0\u1ee3c d\u00f9ng trong m\u00e1y \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed v\u00e0 l\u00f2 s\u01b0\u1edfi \u0111\u1ec3 duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 mong mu\u1ed1n trong kh\u00f4ng gian s\u1ed1ng.<\/li>\n
  • Ng\u00e0nh c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m:<\/strong> Trong n\u01b0\u1edbng b\u00e1nh, nhi\u1ec7t \u0111\u1ed1i l\u01b0u gi\u00fap ph\u00e2n ph\u1ed1i nhi\u1ec7t \u0111\u1ec1u \u0111\u1eb7n kh\u1eafp l\u00f2 \u0111\u1ec3 b\u00e1nh n\u01b0\u1edbng ch\u00edn \u0111\u1ec1u.<\/li>\n
  • C\u00e1c b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t:<\/strong> Thi\u1ebft b\u1ecb trao \u0111\u1ed5i nhi\u1ec7t trong nh\u00e0 m\u00e1y h\u00f3a ch\u1ea5t, nh\u00e0 m\u00e1y \u0111i\u1ec7n c\u0169ng s\u1eed d\u1ee5ng nguy\u00ean l\u00fd \u0111\u1ed1i l\u01b0u \u0111\u1ec3 truy\u1ec1n nhi\u1ec7t t\u1eeb b\u1ed9 ph\u1eadn n\u00e0y sang b\u1ed9 ph\u1eadn kh\u00e1c m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/li>\n

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

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

    Hi\u1ec3u nguy\u00ean l\u00fd gia nhi\u1ec7t \u0111\u1ed1i l\u01b0u gi\u00fap ch\u00fang ta c\u1ea3i ti\u1ebfn hi\u1ec7u su\u1ea5t trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng nhi\u1ec7t v\u00e0 l\u00e0m l\u1ea1nh. T\u1eeb c\u00e1c thi\u1ebft b\u1ecb gia d\u1ee5ng \u0111\u1ebfn c\u00e1c quy tr\u00ecnh c\u00f4ng nghi\u1ec7p l\u1edbn, vi\u1ec7c \u1ee9ng d\u1ee5ng \u0111\u1ed1i l\u01b0u nhi\u1ec7t l\u00e0 r\u1ea5t quan tr\u1ecdng cho vi\u1ec7c ki\u1ec3m so\u00e1t v\u00e0 s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Nguy\u00ean l\u00fd gia nhi\u1ec7t \u0111\u1ed1i l\u01b0u \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch: t\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t l\u01b0u chuy\u1ec3n trong kh\u00f4ng kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng \u0111\u1ec3 l\u00e0m n\u00f3ng \u0111\u1ec1u c\u00e1c v\u1eadt th\u1ec3 v\u00e0 kh\u00f4ng gian.<\/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":"\nNguy\u00ean L\u00fd Gia Nhi\u1ec7t \u0110\u1ed1i L\u01b0u \u0110\u01b0\u1ee3c Gi\u1ea3i Th\u00edch<\/title>\n<meta name=\"description\" content=\"Nguy\u00ean l\u00fd gia nhi\u1ec7t \u0111\u1ed1i l\u01b0u \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch: t\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t l\u01b0u chuy\u1ec3n trong kh\u00f4ng kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng \u0111\u1ec3 l\u00e0m n\u00f3ng \u0111\u1ec1u c\u00e1c v\u1eadt th\u1ec3 v\u00e0 kh\u00f4ng gian.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thermal-engineering.org\/vi\/nguyen-ly-gia-nhiet-doi-luu-duoc-giai-thich\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nguy\u00ean L\u00fd Gia Nhi\u1ec7t \u0110\u1ed1i L\u01b0u \u0110\u01b0\u1ee3c Gi\u1ea3i Th\u00edch\" \/>\n<meta property=\"og:description\" content=\"Nguy\u00ean l\u00fd gia nhi\u1ec7t \u0111\u1ed1i l\u01b0u \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch: t\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t l\u01b0u chuy\u1ec3n trong kh\u00f4ng kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng \u0111\u1ec3 l\u00e0m n\u00f3ng \u0111\u1ec1u c\u00e1c v\u1eadt th\u1ec3 v\u00e0 kh\u00f4ng gian.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.thermal-engineering.org\/vi\/nguyen-ly-gia-nhiet-doi-luu-duoc-giai-thich\/\" \/>\n<meta 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