{"id":676384,"date":"2024-08-29T05:03:05","date_gmt":"2024-08-29T04:03:05","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=676384"},"modified":"2024-08-29T05:03:05","modified_gmt":"2024-08-29T04:03:05","slug":"lam-the-nao-khi-cau-nhiet-duy-tri-do-noi","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/lam-the-nao-khi-cau-nhiet-duy-tri-do-noi\/","title":{"rendered":"L\u00e0m th\u1ebf n\u00e0o kh\u00ed c\u1ea7u nhi\u1ec7t duy tr\u00ec \u0111\u1ed9 n\u1ed5i"},"content":{"rendered":"

Kh\u00ed c\u1ea7u nhi\u1ec7t duy tr\u00ec \u0111\u1ed9 n\u1ed5i nh\u1edd s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa kh\u00f4ng kh\u00ed b\u00ean trong kh\u00ed c\u1ea7u v\u00e0 b\u00ean ngo\u00e0i, gi\u00fap kh\u00ed c\u1ea7u bay cao ho\u1eb7c h\u1ea1 xu\u1ed1ng.<\/p>\n

\"L\u00e0m<\/p>\n

L\u00e0m th\u1ebf n\u00e0o kh\u00ed c\u1ea7u nhi\u1ec7t duy tr\u00ec \u0111\u1ed9 n\u1ed5i<\/h2>\n

Kh\u00ed c\u1ea7u nhi\u1ec7t, hay c\u00f2n g\u1ecdi l\u00e0 kh\u00ed c\u1ea7u n\u00f3ng, l\u00e0 m\u1ed9t lo\u1ea1i ph\u01b0\u01a1ng ti\u1ec7n bay d\u00f9ng s\u1ee9c n\u00e2ng c\u1ee7a kh\u00f4ng kh\u00ed n\u00f3ng. Ch\u00fang duy tr\u00ec \u0111\u1ed9 n\u1ed5i (kh\u1ea3 n\u0103ng bay ho\u1eb7c l\u01a1 l\u1eedng trong kh\u00f4ng kh\u00ed) nh\u1edd v\u00e0o nguy\u00ean l\u00fd v\u1ec1 s\u1ef1 kh\u00e1c bi\u1ec7t nhi\u1ec7t \u0111\u1ed9 v\u00e0 m\u1eadt \u0111\u1ed9 kh\u00f4ng kh\u00ed. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1ea3i th\u00edch c\u01a1 b\u1ea3n v\u1ec1 c\u00e1ch kh\u00ed c\u1ea7u nhi\u1ec7t ho\u1ea1t \u0111\u1ed9ng v\u00e0 duy tr\u00ec \u0111\u1ed9 n\u1ed5i c\u1ee7a ch\u00fang.<\/p>\n

Nguy\u00ean l\u00fd c\u01a1 b\u1ea3n<\/h2>\n

Kh\u00ed c\u1ea7u nhi\u1ec7t ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd c\u01a1 b\u1ea3n c\u1ee7a v\u1eadt l\u00fd l\u00e0 \u0111\u1ecbnh lu\u1eadt Archimedes. \u0110\u1ecbnh lu\u1eadt n\u00e0y n\u00f3i r\u1eb1ng b\u1ea5t k\u1ef3 v\u1eadt th\u1ec3 n\u00e0o \u0111\u01b0\u1ee3c \u0111\u1eb7t trong m\u1ed9t ch\u1ea5t l\u1ecfng (ho\u1eb7c kh\u00ed) s\u1ebd ch\u1ecbu m\u1ed9t l\u1ef1c \u0111\u1ea9y l\u00ean b\u1eb1ng tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a ch\u1ea5t l\u1ecfng b\u1ecb n\u00f3 \u0111\u1ea9y ra. Trong tr\u01b0\u1eddng h\u1ee3p c\u1ee7a kh\u00ed c\u1ea7u nhi\u1ec7t, ph\u1ea7n ch\u1ea5t l\u1ecfng \u1edf \u0111\u00e2y l\u00e0 kh\u00f4ng kh\u00ed.<\/p>\n

C\u1ea5u tr\u00fac c\u1ee7a kh\u00ed c\u1ea7u nhi\u1ec7t<\/h2>\n

M\u1ed9t kh\u00ed c\u1ea7u nhi\u1ec7t th\u00f4ng th\u01b0\u1eddng bao g\u1ed3m ba ph\u1ea7n ch\u00ednh:<\/p>\n

<\/p>\n

  • V\u1ecf b\u1ecdc (Envelope):<\/strong> \u0110\u00e2y l\u00e0 ph\u1ea7n ch\u1ee9a kh\u00f4ng kh\u00ed n\u00f3ng, th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb nylon ho\u1eb7c polyester \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao.<\/li>\n
  • Gi\u1ecf (Basket):<\/strong> L\u00e0 ph\u1ea7n ch\u1ee9a ng\u01b0\u1eddi l\u00e1i v\u00e0 h\u00e0nh kh\u00e1ch, th\u01b0\u1eddng l\u00e0m t\u1eeb v\u1eadt li\u1ec7u nh\u1eb9 nh\u01b0 m\u00e2y tre \u0111an \u0111\u1ec3 gi\u1ea3m tr\u1ecdng l\u01b0\u1ee3ng.<\/li>\n
  • Burner:<\/strong> H\u1ec7 th\u1ed1ng \u0111\u1ed1t ch\u00e1y nhi\u00ean li\u1ec7u (th\u01b0\u1eddng l\u00e0 propane) \u0111\u1ec3 l\u00e0m n\u00f3ng kh\u00f4ng kh\u00ed b\u00ean trong v\u1ecf b\u1ecdc.<\/li>\n

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

    Qu\u00e1 tr\u00ecnh duy tr\u00ec \u0111\u1ed9 n\u1ed5i<\/h2>\n

    Qu\u00e1 tr\u00ecnh duy tr\u00ec \u0111\u1ed9 n\u1ed5i c\u1ee7a kh\u00ed c\u1ea7u nhi\u1ec7t g\u1ed3m ba b\u01b0\u1edbc ch\u00ednh:<\/p>\n

    <\/p>\n

  • \u0110\u1ed1t ch\u00e1y nhi\u00ean li\u1ec7u trong burner \u0111\u1ec3 l\u00e0m n\u00f3ng kh\u00f4ng kh\u00ed b\u00ean trong v\u1ecf b\u1ecdc.<\/li>\n
  • L\u00e0m n\u00f3ng kh\u00f4ng kh\u00ed trong v\u1ecf b\u1ecdc d\u1eabn \u0111\u1ebfn gi\u1ea3m m\u1eadt \u0111\u1ed9 c\u1ee7a n\u00f3. Theo \u0111\u1ecbnh lu\u1eadt kh\u00ed l\u00fd t\u01b0\u1edfng, khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng, kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang (m\u1eadt \u0111\u1ed9) c\u1ee7a kh\u00f4ng kh\u00ed gi\u1ea3m: \\( \\rho = \\frac{P}{RT} \\), trong \u0111\u00f3 \\(\\rho\\) l\u00e0 m\u1eadt \u0111\u1ed9, P l\u00e0 \u00e1p su\u1ea5t, R l\u00e0 h\u1eb1ng s\u1ed1 kh\u00ed, v\u00e0 T l\u00e0 nhi\u1ec7t \u0111\u1ed9 tuy\u1ec7t \u0111\u1ed1i.<\/li>\n
  • Kh\u00f4ng kh\u00ed n\u00f3ng nh\u1eb9 h\u01a1n kh\u00f4ng kh\u00ed l\u1ea1nh xung quanh, d\u1eabn \u0111\u1ebfn l\u1ef1c \u0111\u1ea9y l\u00ean theo \u0111\u1ecbnh lu\u1eadt Archimedes, cho ph\u00e9p kh\u00ed c\u1ea7u n\u00e2ng l\u00ean.<\/li>\n

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

    Ki\u1ec3m so\u00e1t \u0111\u1ed9 cao<\/h2>\n

    Ng\u01b0\u1eddi \u0111i\u1ec1u khi\u1ec3n kh\u00ed c\u1ea7u c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u1ed9 cao b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 c\u1ee7a kh\u00f4ng kh\u00ed trong v\u1ecf b\u1ecdc:<\/p>\n

    <\/p>\n

  • T\u0103ng \u0111\u1ed9 cao:<\/strong> \u0110\u1ed1t nhi\u1ec7t nhi\u1ec1u h\u01a1n \u0111\u1ec3 l\u00e0m kh\u00f4ng kh\u00ed n\u00f3ng h\u01a1n, gi\u1ea3m m\u1eadt \u0111\u1ed9 v\u00e0 t\u0103ng l\u1ef1c \u0111\u1ea9y l\u00ean.<\/li>\n
  • Gi\u1ea3m \u0111\u1ed9 cao:<\/strong> Gi\u1ea3m nhi\u1ec7t ho\u1eb7c cho ph\u00e9p kh\u00f4ng kh\u00ed n\u00f3ng tho\u00e1t ra, \u0111\u1ec3 kh\u00f4ng kh\u00ed trong v\u1ecf b\u1ecdc ngu\u1ed9i \u0111i, t\u0103ng m\u1eadt \u0111\u1ed9 v\u00e0 gi\u1ea3m l\u1ef1c \u0111\u1ea9y l\u00ean.<\/li>\n

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

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

    Kh\u00ed c\u1ea7u nhi\u1ec7t duy tr\u00ec \u0111\u1ed9 n\u1ed5i nh\u1edd v\u00e0o s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 nhi\u1ec7t \u0111\u1ed9 v\u00e0 m\u1eadt \u0111\u1ed9 c\u1ee7a kh\u00f4ng kh\u00ed. B\u1eb1ng c\u00e1ch l\u00e0m n\u00f3ng kh\u00f4ng kh\u00ed trong v\u1ecf b\u1ecdc, kh\u00ed c\u1ea7u t\u1ea1o ra l\u1ef1c \u0111\u1ea9y h\u01b0\u1edbng l\u00ean \u0111\u1ee7 l\u1edbn \u0111\u1ec3 n\u00e2ng c\u1ea3 v\u1ecf b\u1ecdc v\u00e0 gi\u1ecf ch\u1ee9a h\u00e0nh kh\u00e1ch. Vi\u1ec7c ki\u1ec3m so\u00e1t \u0111\u1ed9 cao \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 c\u1ee7a kh\u00f4ng kh\u00ed b\u00ean trong kh\u00ed c\u1ea7u. \u0110\u00e2y l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a c\u00e1c nguy\u00ean l\u00fd v\u1eadt l\u00fd c\u01a1 b\u1ea3n, cho ph\u00e9p ch\u00fang ta t\u1eadn d\u1ee5ng s\u1ee9c m\u1ea1nh c\u1ee7a nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc v\u00e0 \u0111\u1ed9ng l\u1ef1c h\u1ecdc ch\u1ea5t l\u1ecfng v\u00e0o vi\u1ec7c bay l\u01b0\u1ee3n.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Kh\u00ed c\u1ea7u nhi\u1ec7t duy tr\u00ec \u0111\u1ed9 n\u1ed5i nh\u1edd s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa kh\u00f4ng kh\u00ed b\u00ean trong kh\u00ed c\u1ea7u v\u00e0 b\u00ean ngo\u00e0i, gi\u00fap kh\u00ed c\u1ea7u bay cao ho\u1eb7c h\u1ea1 xu\u1ed1ng.<\/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":"\nL\u00e0m th\u1ebf n\u00e0o kh\u00ed c\u1ea7u nhi\u1ec7t duy tr\u00ec \u0111\u1ed9 n\u1ed5i<\/title>\n<meta name=\"description\" content=\"Kh\u00ed c\u1ea7u nhi\u1ec7t duy tr\u00ec \u0111\u1ed9 n\u1ed5i nh\u1edd s\u1ef1 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa kh\u00f4ng kh\u00ed b\u00ean trong kh\u00ed c\u1ea7u v\u00e0 b\u00ean ngo\u00e0i, gi\u00fap kh\u00ed c\u1ea7u bay cao ho\u1eb7c h\u1ea1 xu\u1ed1ng.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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