{"id":692563,"date":"2024-10-06T19:38:17","date_gmt":"2024-10-06T18:38:17","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=692563"},"modified":"2024-10-06T19:38:17","modified_gmt":"2024-10-06T18:38:17","slug":"tinh-chat-nhiet-cua-chat-lam-lanh-r-12-dichlorodifluoromethane","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/tinh-chat-nhiet-cua-chat-lam-lanh-r-12-dichlorodifluoromethane\/","title":{"rendered":"T\u00ednh Ch\u1ea5t Nhi\u1ec7t c\u1ee7a Ch\u1ea5t L\u00e0m L\u1ea1nh R-12 (Dichlorodifluoromethane)"},"content":{"rendered":"<p class=\"sidekick\">T\u00ednh Ch\u1ea5t Nhi\u1ec7t c\u1ee7a Ch\u1ea5t L\u00e0m L\u1ea1nh R-12 (Dichlorodifluoromethane): t\u00ecm hi\u1ec3u v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m, \u1ee9ng d\u1ee5ng v\u00e0 hi\u1ec7u su\u1ea5t nhi\u1ec7t c\u1ee7a ch\u1ea5t l\u00e0m l\u1ea1nh ph\u1ed5 bi\u1ebfn trong h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/tinh_chat_nhiet_cua_chat_lam_lanh_r-12_dichlorodifluoromethane.png\" alt=\"T\u00ednh Ch\u1ea5t Nhi\u1ec7t c\u1ee7a Ch\u1ea5t L\u00e0m L\u1ea1nh R-12 (Dichlorodifluoromethane)\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>T\u00ednh Ch\u1ea5t Nhi\u1ec7t c\u1ee7a Ch\u1ea5t L\u00e0m L\u1ea1nh R-12 (Dichlorodifluoromethane)<\/h2>\n<p>Ch\u1ea5t l\u00e0m l\u1ea1nh R-12, hay c\u00f2n \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi t\u00ean g\u1ecdi dichlorodifluoromethane, l\u00e0 m\u1ed9t trong nh\u1eefng ch\u1ea5t l\u00e0m l\u1ea1nh ph\u1ed5 bi\u1ebfn nh\u1ea5t trong ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed v\u00e0 l\u00e0m l\u1ea1nh. V\u1edbi c\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc CCl<sub>2<\/sub>F<sub>2<\/sub>, R-12 \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i tr\u01b0\u1edbc khi c\u00e1c quy \u0111\u1ecbnh v\u1ec1 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng h\u1ea1n ch\u1ebf vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c ch\u1ea5t g\u00e2y h\u1ea1i t\u1ea7ng ozone.<\/p>\n<h2>T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u01a1 b\u1ea3n<\/h2>\n<ul>\n<li>Tr\u1ea1ng th\u00e1i: Kh\u00ed \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng v\u00e0 \u00e1p su\u1ea5t th\u01b0\u1eddng.<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 s\u00f4i: -29.8\u00b0C.<\/li>\n<li>Kh\u1ed1i l\u01b0\u1ee3ng ph\u00e2n t\u1eed: 120.91 g\/mol.<\/li>\n<li>\u0110\u1ed9 d\u1eabn nhi\u1ec7t: 0.0837 W\/m\u00b7K \u1edf 0\u00b0C.<\/li>\n<li>Nhi\u1ec7t dung ri\u00eang: 0.67 kJ\/kg\u00b7K (\u1edf nhi\u1ec7t \u0111\u1ed9 25\u00b0C).<\/li>\n<li>Kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang: 1.486 g\/cm\u00b3 \u1edf 25\u00b0C (ch\u1ea5t l\u1ecfng).<\/li>\n<\/ul>\n<h2>T\u00ednh ch\u1ea5t nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc<\/h2>\n<ul>\n<li>N\u0103ng l\u01b0\u1ee3ng bay h\u01a1i: Kho\u1ea3ng 165 kJ\/kg \u1edf nhi\u1ec7t \u0111\u1ed9 -30\u00b0C.<\/li>\n<li>\u00c1p su\u1ea5t h\u01a1i: \u00c1p su\u1ea5t h\u01a1i c\u1ee7a R-12 t\u0103ng theo nhi\u1ec7t \u0111\u1ed9. V\u00ed d\u1ee5, \u1edf 25\u00b0C, \u00e1p su\u1ea5t h\u01a1i \u0111\u1ea1t kho\u1ea3ng 5.6 bar.<\/li>\n<li>H\u1ec7 s\u1ed1 n\u00e9n: R-12 c\u00f3 h\u1ec7 s\u1ed1 n\u00e9n th\u1ea5p, cho ph\u00e9p n\u00f3 d\u1ec5 d\u00e0ng n\u00e9n v\u00e0 gi\u1ea3i n\u00e9n trong c\u00e1c h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh.<\/li>\n<\/ul>\n<h2>S\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh<\/h2>\n<p>R-12 l\u00e0 m\u1ed9t ch\u1ea5t l\u00e0m l\u1ea1nh hi\u1ec7u qu\u1ea3 do c\u00f3 nhi\u1ec7t \u0111\u1ed9 s\u00f4i th\u1ea5p v\u00e0 n\u0103ng l\u01b0\u1ee3ng bay h\u01a1i cao, gi\u00fap chuy\u1ec3n \u0111\u1ed5i d\u1ec5 d\u00e0ng gi\u1eefa c\u00e1c tr\u1ea1ng th\u00e1i l\u1ecfng v\u00e0 kh\u00ed trong qu\u00e1 tr\u00ecnh l\u00e0m l\u1ea1nh. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 bao g\u1ed3m:<\/p>\n<ol>\n<li><b>\u0110i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed<\/b>: R-12 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed gia \u0111\u00ecnh v\u00e0 \u00f4 t\u00f4 v\u00ec \u0111\u1eb7c t\u00ednh nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc c\u1ee7a n\u00f3.<\/li>\n<li><b>T\u1ee7 l\u1ea1nh<\/b>: C\u00e1c t\u1ee7 l\u1ea1nh gia \u0111\u00ecnh s\u1eed d\u1ee5ng R-12 nh\u1edd kh\u1ea3 n\u0103ng chuy\u1ec3n pha hi\u1ec7u qu\u1ea3 c\u1ee7a n\u00f3.<\/li>\n<li><b>C\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p<\/b>: R-12 c\u00f2n \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p y\u00eau c\u1ea7u hi\u1ec7u su\u1ea5t l\u00e0m l\u1ea1nh cao nh\u01b0 h\u1ec7 th\u1ed1ng l\u00e0m l\u1ea1nh c\u00f4ng nghi\u1ec7p v\u00e0 c\u00e1c thi\u1ebft b\u1ecb t\u1ea1o \u0111\u00f4ng.<\/li>\n<\/ol>\n<h2>L\u01b0u \u00fd m\u00f4i tr\u01b0\u1eddng<\/h2>\n<p>M\u1eb7c d\u00f9 R-12 c\u00f3 hi\u1ec7u su\u1ea5t l\u00e0m l\u1ea1nh cao, n\u00f3 \u0111\u00e3 b\u1ecb h\u1ea1n ch\u1ebf v\u00e0 d\u1ea7n \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf do t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c \u0111\u1ebfn t\u1ea7ng ozone. R-12 g\u00f3p ph\u1ea7n v\u00e0o hi\u1ec7n t\u01b0\u1ee3ng m\u1ecfng d\u1ea7n c\u1ee7a t\u1ea7ng ozone, g\u00e2y ra c\u00e1c quy \u0111\u1ecbnh nghi\u00eam ng\u1eb7t t\u1eeb c\u00e1c t\u1ed5 ch\u1ee9c b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng. Hi\u1ec7n nay, c\u00e1c ch\u1ea5t l\u00e0m l\u1ea1nh thay th\u1ebf nh\u01b0 R-134a v\u00e0 R-410A \u0111ang d\u1ea7n thay th\u1ebf R-12.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>R-12 t\u1eebng l\u00e0 ch\u1ea5t l\u00e0m l\u1ea1nh ph\u1ed5 bi\u1ebfn nh\u1edd v\u00e0o c\u00e1c t\u00ednh ch\u1ea5t nhi\u1ec7t l\u00fd \u01b0u vi\u1ec7t c\u1ee7a n\u00f3. Tuy nhi\u00ean, do c\u00e1c v\u1ea5n \u0111\u1ec1 m\u00f4i tr\u01b0\u1eddng, vi\u1ec7c s\u1eed d\u1ee5ng R-12 \u0111ang b\u1ecb gi\u1ea3m thi\u1ec3u v\u00e0 thay th\u1ebf b\u1edfi c\u00e1c ch\u1ea5t l\u00e0m l\u1ea1nh th\u00e2n thi\u1ec7n h\u01a1n. N\u1eafm v\u1eefng c\u00e1c t\u00ednh ch\u1ea5t nhi\u1ec7t c\u1ee7a R-12 gi\u00fap ch\u00fang ta hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 th\u1ebf gi\u1edbi ch\u1ea5t l\u00e0m l\u1ea1nh v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c t\u00ecm ki\u1ebfm c\u00e1c gi\u1ea3i ph\u00e1p thay th\u1ebf an to\u00e0n h\u01a1n cho m\u00f4i tr\u01b0\u1eddng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u00ednh Ch\u1ea5t Nhi\u1ec7t c\u1ee7a Ch\u1ea5t L\u00e0m L\u1ea1nh R-12 (Dichlorodifluoromethane): t\u00ecm hi\u1ec3u v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m, \u1ee9ng d\u1ee5ng v\u00e0 hi\u1ec7u su\u1ea5t nhi\u1ec7t c\u1ee7a ch\u1ea5t l\u00e0m l\u1ea1nh ph\u1ed5 bi\u1ebfn trong h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a.<\/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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