![\"Nhi\u1ec7t](\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/nhiet_dong_hoc_cua_chat_long_sieu_toi_han.png\")
<\/p>\nNhi\u1ec7t \u0111\u1ed9ng h\u1ecdc ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n: t\u00ecm hi\u1ec3u c\u00e1ch ch\u1ea5t l\u1ecfng thay \u0111\u1ed5i t\u00ednh ch\u1ea5t v\u1eadt l\u00fd trong tr\u1ea1ng th\u00e1i si\u00eau t\u1edbi h\u1ea1n v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang trong th\u1ef1c t\u1ebf.<\/p>\n
<\/p>\n
Nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc c\u1ee7a ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c quan tr\u1ecdng trong nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc v\u00e0 k\u1ef9 thu\u1eadt nhi\u1ec7t. Ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n l\u00e0 tr\u1ea1ng th\u00e1i c\u1ee7a v\u1eadt ch\u1ea5t v\u01b0\u1ee3t qua \u0111i\u1ec3m t\u1edbi h\u1ea1n, kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t gi\u1eefa pha l\u1ecfng v\u00e0 pha kh\u00ed. \u1ede \u0111i\u1ec3m n\u00e0y, ch\u1ea5t l\u1ecfng c\u00f3 c\u00e1c t\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p.<\/p>\n
\u0110i\u1ec3m T\u1edbi H\u1ea1n<\/b>: \u0110i\u1ec3m t\u1edbi h\u1ea1n l\u00e0 nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u00e1p su\u1ea5t t\u1ea1i \u0111\u00f3 c\u00e1c giai \u0111o\u1ea1n l\u1ecfng v\u00e0 kh\u00ed c\u1ee7a m\u1ed9t ch\u1ea5t tr\u1edf n\u00ean kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c. V\u00ed d\u1ee5, \u0111i\u1ec3m t\u1edbi h\u1ea1n c\u1ee7a n\u01b0\u1edbc l\u00e0 374\u00b0C v\u00e0 22,1 MPa.<\/p>\n
Ch\u1ea5t L\u1ecfng Si\u00eau T\u1edbi H\u1ea1n<\/b>: Khi m\u1ed9t ch\u1ea5t v\u01b0\u1ee3t qua \u0111i\u1ec3m t\u1edbi h\u1ea1n, n\u00f3 tr\u1edf th\u00e0nh ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n. Giai \u0111o\u1ea1n n\u00e0y k\u1ebft h\u1ee3p c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a c\u1ea3 kh\u00ed v\u00e0 l\u1ecfng, nh\u01b0 \u0111\u1ed9 khu\u1ebfch t\u00e1n cao gi\u1ed1ng kh\u00ed nh\u01b0ng t\u01b0\u01a1ng t\u1ef1 t\u00ednh d\u1eabn nhi\u1ec7t v\u00e0 \u0111\u1ed9 nh\u1edbt th\u1ea5p c\u1ee7a ch\u1ea5t l\u1ecfng.<\/p>\n Trong nghi\u00ean c\u1ee9u nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc c\u1ee7a ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n, ph\u01b0\u01a1ng tr\u00ecnh tr\u1ea1ng th\u00e1i l\u00e0 c\u00f4ng c\u1ee5 quan tr\u1ecdng \u0111\u1ec3 m\u00f4 t\u1ea3 t\u00ednh ch\u1ea5t c\u1ee7a ch\u1ea5t d\u01b0\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau. M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng tr\u00ecnh n\u1ed5i ti\u1ebfng bao g\u1ed3m:<\/p>\n \n \\[ Trong \u0111\u00f3: <\/p>\n \n \\[ Trong \u0111\u00f3: <\/p>\n Nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc c\u1ee7a ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n mang l\u1ea1i nhi\u1ec1u ti\u1ec1m n\u0103ng trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p nh\u1edd v\u00e0o t\u00ednh ch\u1ea5t \u0111\u1eb7c bi\u1ec7t c\u1ee7a ch\u00fang. N\u1eafm v\u1eefng nguy\u00ean l\u00fd v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh tr\u1ea1ng th\u00e1i li\u00ean quan gi\u00fap c\u00e1c k\u1ef9 s\u01b0 v\u00e0 nh\u00e0 khoa h\u1ecdc ph\u00e1t tri\u1ec3n c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi hi\u1ec7u qu\u1ea3 h\u01a1n, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng cao c\u1ee7a x\u00e3 h\u1ed9i.<\/p>\n","protected":false},"excerpt":{"rendered":" Nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc ch\u1ea5t l\u1ecfng si\u00eau t\u1edbi h\u1ea1n: t\u00ecm hi\u1ec3u c\u00e1ch ch\u1ea5t l\u1ecfng thay \u0111\u1ed5i t\u00ednh ch\u1ea5t v\u1eadt l\u00fd trong tr\u1ea1ng th\u00e1i si\u00eau t\u1edbi h\u1ea1n v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang trong th\u1ef1c t\u1ebf.<\/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":"\n\u1ee8ng D\u1ee5ng c\u1ee7a Ch\u1ea5t L\u1ecfng Si\u00eau T\u1edbi H\u1ea1n<\/h2>\n
\n
Ph\u01b0\u01a1ng Tr\u00ecnh Tr\u1ea1ng Th\u00e1i<\/h2>\n
\n
\n \\left( P + \\frac{a}{V_m^2} \\right) (V_m – b) = RT
\n \\]\n <\/p>\n\n
\n P = \\frac{RT}{V_m – b} – \\frac{a [1 + (1 – T_r^{0.291})^2]}{V_m (V_m + b) + b (V_m – b)}
\n \\]\n <\/p>\n\n
K\u1ebft Lu\u1eadn<\/h2>\n