کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11028244 | 1663614 | 2019 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamic properties of (R1234yfâ¯+â¯R290): Isochoric pÏTx and specific heat capacity cv measurements and an equation of state
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this paper, isochoric pÏTx and specific heat capacity cv for (R1234yfâ¯+â¯R290) binary mixtures were measured using an adiabatic batch calorimeter with intermittent heating. A total of 42 pÏTx data points over temperatures from (254.28 to 348.30) K and 89 isochoric specific heat capacity data points over temperatures from (255.48 to 347.55) K were obtained for liquid (R1234yfâ¯+â¯R290) with mole fractions of R1234yf at (0.825, 0.607, 0.521 and 0.285). The standard uncertainties were estimated to be 10â¯mK for temperature, 5â¯kPa for pressure, 0.3% for density and 1.0% for isochoric specific heat capacity. The experimental pÏTx data were correlated by an empirical Tait equation with average absolute relative deviation of 0.19%. A Helmholtz energy equation of state based on the multi-fluid approximations model was developed for (R1234yfâ¯+â¯R290) using the present and available experimental data. Eleven mixture rules are employed and the optimal Helmholtz energy equation of state calculates the density, VLE and isochoric specific heat capacity properties with sufficient accuracy. The compressed liquid density and isochoric specific heat capacity data in this work are well represented with average absolute relative deviation of 0.21% and 0.66%, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 129, February 2019, Pages 36-43
Journal: The Journal of Chemical Thermodynamics - Volume 129, February 2019, Pages 36-43
نویسندگان
Quan Zhong, Xueqiang Dong, Yanxing Zhao, Haiyang Zhang, Jingzhou Wang, Hao Guo, Jun Shen, Maoqiong Gong,