{"id":692582,"date":"2024-08-15T17:27:51","date_gmt":"2024-08-15T16:27:51","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=692582"},"modified":"2024-08-15T17:27:51","modified_gmt":"2024-08-15T16:27:51","slug":"tetrafluoroethane-chat-lam-lanh-r-134a-truyen-nhiet","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/tetrafluoroethane-chat-lam-lanh-r-134a-truyen-nhiet\/","title":{"rendered":"Tetrafluoroethane | Ch\u1ea5t l\u00e0m l\u1ea1nh R-134a, Truy\u1ec1n nhi\u1ec7t"},"content":{"rendered":"<p class=\"sidekick\">Ch\u1ea5t l\u00e0m l\u1ea1nh R-134a, Tetrafluoroethane, trong truy\u1ec1n nhi\u1ec7t: Vai tr\u00f2, \u1ee9ng d\u1ee5ng v\u00e0 t\u1ea7m quan tr\u1ecdng trong h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh v\u00e0 \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/tetrafluoroethane_chat_lam_lanh_r-134a_truyen_nhiet.png\" alt=\"Tetrafluoroethane | Ch\u1ea5t l\u00e0m l\u1ea1nh R-134a, Truy\u1ec1n nhi\u1ec7t\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Tetrafluoroethane | Ch\u1ea5t l\u00e0m l\u1ea1nh R-134a, Truy\u1ec1n nhi\u1ec7t<\/h2>\n<p>Trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, tetrafluoroethane (C<sub>2<\/sub>H<sub>2<\/sub>F<sub>4<\/sub>), c\u00f2n \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi t\u00ean g\u1ecdi R-134a, l\u00e0 m\u1ed9t ch\u1ea5t l\u00e0m l\u1ea1nh ph\u1ed5 bi\u1ebfn. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed v\u00e0 t\u1ee7 l\u1ea1nh nh\u1edd v\u00e0o \u0111\u1eb7c t\u00ednh thay th\u1ebf cho chlorofluorocarbon (CFC) v\u00e0 hydrochlorofluorocarbon (HCFC) g\u00e2y h\u1ea1i cho t\u1ea7ng ozone.<\/p>\n<h2>\u0110\u1eb7c t\u00ednh c\u1ee7a R-134a<\/h2>\n<ul>\n<li>Danh ph\u00e1p h\u00f3a h\u1ecdc: 1,1,1,2-Tetrafluoroethane<\/li>\n<li>C\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc: C<sub>2<\/sub>H<sub>2<\/sub>F<sub>4<\/sub><\/li>\n<li>M\u00e3 ASHRAE: R-134a<\/li>\n<li>\u0110i\u1ec3m s\u00f4i: -26.3\u00b0C<\/li>\n<li>Nhi\u1ec7t dung ri\u00eang: 0.85 J\/g\u00b0C<\/li>\n<\/ul>\n<p>R-134a l\u00e0 ch\u1ea5t kh\u00f4ng \u0103n m\u00f2n, kh\u00f4ng ch\u00e1y, v\u00e0 c\u00f3 \u0111\u1ed9c t\u00ednh th\u1ea5p. N\u00f3 l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn thay th\u1ebf an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3 cho c\u00e1c ch\u1ea5t l\u00e0m l\u1ea1nh c\u0169 nh\u01b0 R-12, nh\u1edd v\u00e0o kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t t\u1ed1t v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng.<\/p>\n<h2>\u1ee8ng d\u1ee5ng c\u1ee7a R-134a<\/h2>\n<ol>\n<li>\u0110i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed trong \u00f4 t\u00f4.<\/li>\n<li>T\u1ee7 l\u1ea1nh gia \u0111\u00ecnh v\u00e0 c\u00f4ng nghi\u1ec7p.<\/li>\n<li>Thi\u1ebft b\u1ecb l\u00e0m l\u1ea1nh v\u00e0 \u0111\u00f4ng l\u1ea1nh c\u00f4ng nghi\u1ec7p.<\/li>\n<li>M\u00e1y b\u01a1m nhi\u1ec7t.<\/li>\n<\/ol>\n<p>Nh\u1edd v\u00e0o c\u00e1c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i, R-134a \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y, \u0111\u1eb7c bi\u1ec7t trong vi\u1ec7c duy tr\u00ec m\u00f4i tr\u01b0\u1eddng s\u1ed1ng v\u00e0 l\u00e0m vi\u1ec7c tho\u1ea3i m\u00e1i.<\/p>\n<h2>Kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t c\u1ee7a R-134a<\/h2>\n<p>R-134a c\u00f3 \u0111\u1eb7c t\u00ednh truy\u1ec1n nhi\u1ec7t \u01b0u vi\u1ec7t, gi\u00fap n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng ch\u1ea5t l\u00e0m l\u1ea1nh hi\u1ec7u qu\u1ea3 nh\u1ea5t trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t. Hi\u1ec7u qu\u1ea3 truy\u1ec1n nhi\u1ec7t c\u1ee7a R-134a ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p su\u1ea5t l\u00e0m vi\u1ec7c.<\/p>\n<p>Ph\u01b0\u01a1ng tr\u00ecnh c\u01a1 b\u1ea3n cho qu\u00e1 tr\u00ecnh truy\u1ec1n nhi\u1ec7t trong h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n nh\u01b0 sau:<\/p>\n<p><i>Q<\/i> = <i>m<\/i> * <i>c<\/i> * \u2206<i>T<\/i><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><i>Q<\/i> l\u00e0 nhi\u1ec7t l\u01b0\u1ee3ng truy\u1ec1n (Joules, J)<\/li>\n<li><i>m<\/i> l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng ch\u1ea5t l\u00e0m l\u1ea1nh (kilograms, kg)<\/li>\n<li><i>c<\/i> l\u00e0 nhi\u1ec7t dung ri\u00eang c\u1ee7a ch\u1ea5t l\u00e0m l\u1ea1nh (J\/kg\u00b0C)<\/li>\n<li>\u2206<i>T<\/i> l\u00e0 s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 (Celsius, \u00b0C)<\/li>\n<\/ul>\n<p>R-134a c\u00f3 nhi\u1ec7t dung ri\u00eang cao v\u00e0 nhi\u1ec7t \u0111\u1ed9 s\u00f4i th\u1ea5p, \u0111i\u1ec1u n\u00e0y gi\u00fap n\u00f3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c h\u1ea5p th\u1ee5 v\u00e0 lo\u1ea1i b\u1ecf nhi\u1ec7t khi thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i t\u1eeb l\u1ecfng sang h\u01a1i v\u00e0 ng\u01b0\u1ee3c l\u1ea1i trong h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Tetrafluoroethane (R-134a) \u0111\u00e3 ch\u1ee9ng t\u1ecf l\u00e0 m\u1ed9t ch\u1ea5t l\u00e0m l\u1ea1nh hi\u1ec7u qu\u1ea3 v\u00e0 an to\u00e0n, \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t hi\u1ec7n \u0111\u1ea1i. V\u1edbi nh\u1eefng \u0111\u1eb7c t\u00ednh n\u1ed5i b\u1eadt v\u1ec1 kh\u1ea3 n\u0103ng truy\u1ec1n nhi\u1ec7t v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng, R-134a v\u1eabn s\u1ebd ti\u1ebfp t\u1ee5c l\u00e0 l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a v\u00e0 l\u00e0m l\u1ea1nh trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ch\u1ea5t l\u00e0m l\u1ea1nh R-134a, Tetrafluoroethane, trong truy\u1ec1n nhi\u1ec7t: Vai tr\u00f2, \u1ee9ng d\u1ee5ng v\u00e0 t\u1ea7m quan tr\u1ecdng trong h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh v\u00e0 \u0111i\u1ec1u h\u00f2a kh\u00f4ng 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":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - 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