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Maoqiong Gong - One of the best experts on this subject based on the ideXlab platform.
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measurements of pρtx and specific Heat Capacity Cv for r290 r1243zf binary mixtures at temperatures from 292 to 350 k and pressures up to 11 mpa
International Journal of Refrigeration-revue Internationale Du Froid, 2020Co-Authors: Owe Sheng, Qua Zhong, Xueqiang Dong, Yanxing Zhao, Jingzhou Wang, Maoqiong Gong, Ju SheAbstract:Abstract In this paper, isochoric pρTx and specific Heat Capacity (Cv) for (R290 + R1243zf) binary mixtures were measured using an adiabatic batch calorimeter with intermittent Heating. A total of 57 pρTx data points over temperatures from (292 to 350) K and 82 isochoric specific Heat Capacity data points over temperatures from (299 to 350) K were obtained for liquid with mole fractions of R290 at (0.788, 0.606, 0.435 and 0.170). The standard uncertainties were estimated to be 12 mK for temperature, 5 kPa for pressure, 0.30% for density and 0.96% for isochoric specific Heat Capacity. The experimental density and Heat Capacity data agree well with the Helmholtz equation of state (EOS) developed by Bell and Lemmon (2016), and the average absolute relative deviation (AARD) are 0.27% and 1.01%, respectively. Comparisons of the present Cv data with values calculated by the generalized equation developed by Zhong et al. (2019a) was carried out as well, and the results show good agreements with deviations varying from −3.00% to 3.16% and the average absolute relative deviation (AARD) of 0.91%.
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the isochoric specific Heat Capacity for r1234ze e at temperatures from 237 to 349 k and pressures up to 9 2 mpa
The Journal of Chemical Thermodynamics, 2020Co-Authors: Le Wang, Qua Zhong, Xueqiang Dong, Yanxing Zhao, Owe Sheng, Jie Song, Maoqiong GongAbstract:Abstract In this work, the isochoric specific Heat Capacity (Cv) of trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) in the compressed liquid states were measured using an adiabatic batch calorimeter. The temperatures ranged from (237 to 349) K and pressures up to 9.2 MPa. Measurements were obtained for a total of 112 state conditions on 22 pseudo-isochores. The standard uncertainties of temperatures, pressures and isochoric specific Heat capacities were estimated to be 12 mK, 5 kPa and 0.98%, respectively. The experimental Cv values for R1234ze(E) are compared with three equations, including two Helmholtz equations of state (EOSs) and a generalized equation based on corresponding state principle. The data in this work show good agreement, and the average absolute relative deviations are 1.37%, 1.27% and 1.59% for the above three equations, respectively.
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Measurements of pρTx and specific Heat Capacity Cv for (R290 + R1243zf) binary mixtures at temperatures from (292 to 350) K and pressures up to 11 MPa
International Journal of Refrigeration, 2020Co-Authors: Bowen Sheng, Xueqiang Dong, Yanxing Zhao, Jingzhou Wang, Maoqiong Gong, Han Yan, Quan Zhong, Jun ShenAbstract:Abstract In this paper, isochoric pρTx and specific Heat Capacity (Cv) for (R290 + R1243zf) binary mixtures were measured using an adiabatic batch calorimeter with intermittent Heating. A total of 57 pρTx data points over temperatures from (292 to 350) K and 82 isochoric specific Heat Capacity data points over temperatures from (299 to 350) K were obtained for liquid with mole fractions of R290 at (0.788, 0.606, 0.435 and 0.170). The standard uncertainties were estimated to be 12 mK for temperature, 5 kPa for pressure, 0.30% for density and 0.96% for isochoric specific Heat Capacity. The experimental density and Heat Capacity data agree well with the Helmholtz equation of state (EOS) developed by Bell and Lemmon (2016), and the average absolute relative deviation (AARD) are 0.27% and 1.01%, respectively. Comparisons of the present Cv data with values calculated by the generalized equation developed by Zhong et al. (2019a) was carried out as well, and the results show good agreements with deviations varying from −3.00% to 3.16% and the average absolute relative deviation (AARD) of 0.91%.
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a simple generalized equation for compressed liquid isochoric Heat Capacity of pure and mixture refrigerants
Fluid Phase Equilibria, 2019Co-Authors: Quan Zhong, Xueqiang Dong, Yanxing Zhao, Hao Guo, Haiyang Zhang, Bowen Sheng, Jun Shen, Maoqiong GongAbstract:Abstract This work aims to develop a generalized equation for compressed liquid isochoric specific Heat Capacity (Cv). The form of the equation was proposed based on the isochoric specific Heat Capacity calculation equation derived by the Peng-Robinson equation of state. The generalized coefficients were determined by 1734 liquid experimental Cv data from 17 refrigerants. With known critical point, acentric factor and idea gas isochoric specific Heat Capacity, the developed equation can represent the liquid Cv of 17 refrigerants well with the average absolute relative deviation of 1.55%. Large deviations are most likely to appear near the critical point. Comparisons were made to the calculation deviations from the Peng-Robinson equation of state and the multiproperty equations in REFPROP 9.1 software. It indicates that the developed equation provide a simple and reliable method for the calculation of the liquid Cv. Additionally, 9 mixture refrigerants were calculated by the proposed generalized equation with the average absolute relative deviation of 3.13%.
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thermodynamic properties of r1234yf r290 isochoric pρtx and specific Heat Capacity Cv measurements and an equation of state
The Journal of Chemical Thermodynamics, 2019Co-Authors: Qua Zhong, Ju She, Xueqiang Dong, Yanxing Zhao, Jingzhou Wang, Hao Guo, Haiyang Zhang, Maoqiong GongAbstract:Abstract In this paper, isochoric pρTx and specific Heat Capacity Cv for (R1234yf + R290) binary mixtures were measured using an adiabatic batch calorimeter with intermittent Heating. A total of 42 pρTx 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 (R1234yf + R290) with mole fractions of R1234yf at (0.825, 0.607, 0.521 and 0.285). The standard uncertainties were estimated to be 10 mK for temperature, 5 kPa for pressure, 0.3% for density and 1.0% for isochoric specific Heat Capacity. The experimental pρTx 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 (R1234yf + 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.
Shigeru Koyama - One of the best experts on this subject based on the ideXlab platform.
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Isochoric specific Heat Capacity of trans -1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and the HFO-1234ze(E) + CO2 mixture in the liquid phase
Journal of Chemical & Engineering Data, 2011Co-Authors: Kenichi Yamaya, Atsushi Matsuguchi, Noboru Kagawa, Shigeru KoyamaAbstract:The isochoric specific Heat Capacity (Cv) of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and mole fraction x = 0.489 HFO-1234ze(E) + (1 − x) = 0.511 CO2 in the liquid phase were measured with ...
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isochoric specific Heat Capacity of trans 1 3 3 3 tetrafluoropropene hfo 1234ze e and the hfo 1234ze e co2 mixture in the liquid phase
Journal of Chemical & Engineering Data, 2011Co-Authors: Kenichi Yamaya, Atsushi Matsuguchi, Noboru Kagawa, Shigeru KoyamaAbstract:The isochoric specific Heat Capacity (Cv) of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and mole fraction x = 0.489 HFO-1234ze(E) + (1 − x) = 0.511 CO2 in the liquid phase were measured with a twin-cell type adiabatic calorimeter. The sample purity of HFO-1234ze(E) and CO2 was certified to have a minimum purity of 0.9996 mole fraction and 0.99999 mole fraction respectively by gas chromatographic analysis. The measurements were obtained for temperatures ranging from (270 to 425) K and at pressures up to 30 MPa. Temperatures were measured with a platinum resistance thermometer on the bottom of each cell and were reported based on the International Temperature Scale of 1990 (ITS-90). Sample pressures were measured with a quartz crystal transducer. Densities were calculated from the volume of the calorimeter cell and the sample mass. The expanded uncertainty (with a coverage factor k = 2) of temperature measurements is 13 mK and 8 kPa for pressure measurements. The expanded relative uncertainty of densi...
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isochoric specific Heat Capacity of trans 1 3 3 3 tetrafluoropropene hfo 1234ze e and the hfo 1234ze e co2 mixture in the liquid phase
Journal of Chemical & Engineering Data, 2011Co-Authors: Kenichi Yamaya, Atsushi Matsuguchi, Noboru Kagawa, Shigeru KoyamaAbstract:The isochoric specific Heat Capacity (Cv) of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and mole fraction x = 0.489 HFO-1234ze(E) + (1 − x) = 0.511 CO2 in the liquid phase were measured with ...
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study on isochoric specific Heat Capacity of liquid r 410a and hfe 347pcf2
International Journal of Thermophysics, 2010Co-Authors: Atsushi Matsuguchi, Noboru Kagawa, Shigeru KoyamaAbstract:The isochoric Heat Capacity (Cv) of R-410A [a mixture of 49.81 mass% difluoromethane (HFC-32) + 50.19 mass% pentafluoroethane (HFC-125)] and 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethylether (HFE-347pcf2) was measured at temperatures from 277 K to 400 K and at pressures up to 30 MPa. The reported density measurements for R-410A and HFE-347pcf2 are in the single-phase region and cover a density range above 0.92 g·cm−3 and 1.33 g·cm−3, respectively. The measured data of R-410A are compared with data reported by other researchers. Also, the measured data of R-410A are examined with an available equation of state. As a result, it is found that the present Cv data for R-410A agree well with those by other researchers and the calculated values with the equation of state in the measurement range except near the critical isochore.
Xueqiang Dong - One of the best experts on this subject based on the ideXlab platform.
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measurements of pρtx and specific Heat Capacity Cv for r290 r1243zf binary mixtures at temperatures from 292 to 350 k and pressures up to 11 mpa
International Journal of Refrigeration-revue Internationale Du Froid, 2020Co-Authors: Owe Sheng, Qua Zhong, Xueqiang Dong, Yanxing Zhao, Jingzhou Wang, Maoqiong Gong, Ju SheAbstract:Abstract In this paper, isochoric pρTx and specific Heat Capacity (Cv) for (R290 + R1243zf) binary mixtures were measured using an adiabatic batch calorimeter with intermittent Heating. A total of 57 pρTx data points over temperatures from (292 to 350) K and 82 isochoric specific Heat Capacity data points over temperatures from (299 to 350) K were obtained for liquid with mole fractions of R290 at (0.788, 0.606, 0.435 and 0.170). The standard uncertainties were estimated to be 12 mK for temperature, 5 kPa for pressure, 0.30% for density and 0.96% for isochoric specific Heat Capacity. The experimental density and Heat Capacity data agree well with the Helmholtz equation of state (EOS) developed by Bell and Lemmon (2016), and the average absolute relative deviation (AARD) are 0.27% and 1.01%, respectively. Comparisons of the present Cv data with values calculated by the generalized equation developed by Zhong et al. (2019a) was carried out as well, and the results show good agreements with deviations varying from −3.00% to 3.16% and the average absolute relative deviation (AARD) of 0.91%.
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the isochoric specific Heat Capacity for r1234ze e at temperatures from 237 to 349 k and pressures up to 9 2 mpa
The Journal of Chemical Thermodynamics, 2020Co-Authors: Le Wang, Qua Zhong, Xueqiang Dong, Yanxing Zhao, Owe Sheng, Jie Song, Maoqiong GongAbstract:Abstract In this work, the isochoric specific Heat Capacity (Cv) of trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) in the compressed liquid states were measured using an adiabatic batch calorimeter. The temperatures ranged from (237 to 349) K and pressures up to 9.2 MPa. Measurements were obtained for a total of 112 state conditions on 22 pseudo-isochores. The standard uncertainties of temperatures, pressures and isochoric specific Heat capacities were estimated to be 12 mK, 5 kPa and 0.98%, respectively. The experimental Cv values for R1234ze(E) are compared with three equations, including two Helmholtz equations of state (EOSs) and a generalized equation based on corresponding state principle. The data in this work show good agreement, and the average absolute relative deviations are 1.37%, 1.27% and 1.59% for the above three equations, respectively.
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Measurements of pρTx and specific Heat Capacity Cv for (R290 + R1243zf) binary mixtures at temperatures from (292 to 350) K and pressures up to 11 MPa
International Journal of Refrigeration, 2020Co-Authors: Bowen Sheng, Xueqiang Dong, Yanxing Zhao, Jingzhou Wang, Maoqiong Gong, Han Yan, Quan Zhong, Jun ShenAbstract:Abstract In this paper, isochoric pρTx and specific Heat Capacity (Cv) for (R290 + R1243zf) binary mixtures were measured using an adiabatic batch calorimeter with intermittent Heating. A total of 57 pρTx data points over temperatures from (292 to 350) K and 82 isochoric specific Heat Capacity data points over temperatures from (299 to 350) K were obtained for liquid with mole fractions of R290 at (0.788, 0.606, 0.435 and 0.170). The standard uncertainties were estimated to be 12 mK for temperature, 5 kPa for pressure, 0.30% for density and 0.96% for isochoric specific Heat Capacity. The experimental density and Heat Capacity data agree well with the Helmholtz equation of state (EOS) developed by Bell and Lemmon (2016), and the average absolute relative deviation (AARD) are 0.27% and 1.01%, respectively. Comparisons of the present Cv data with values calculated by the generalized equation developed by Zhong et al. (2019a) was carried out as well, and the results show good agreements with deviations varying from −3.00% to 3.16% and the average absolute relative deviation (AARD) of 0.91%.
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a simple generalized equation for compressed liquid isochoric Heat Capacity of pure and mixture refrigerants
Fluid Phase Equilibria, 2019Co-Authors: Quan Zhong, Xueqiang Dong, Yanxing Zhao, Hao Guo, Haiyang Zhang, Bowen Sheng, Jun Shen, Maoqiong GongAbstract:Abstract This work aims to develop a generalized equation for compressed liquid isochoric specific Heat Capacity (Cv). The form of the equation was proposed based on the isochoric specific Heat Capacity calculation equation derived by the Peng-Robinson equation of state. The generalized coefficients were determined by 1734 liquid experimental Cv data from 17 refrigerants. With known critical point, acentric factor and idea gas isochoric specific Heat Capacity, the developed equation can represent the liquid Cv of 17 refrigerants well with the average absolute relative deviation of 1.55%. Large deviations are most likely to appear near the critical point. Comparisons were made to the calculation deviations from the Peng-Robinson equation of state and the multiproperty equations in REFPROP 9.1 software. It indicates that the developed equation provide a simple and reliable method for the calculation of the liquid Cv. Additionally, 9 mixture refrigerants were calculated by the proposed generalized equation with the average absolute relative deviation of 3.13%.
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thermodynamic properties of r1234yf r290 isochoric pρtx and specific Heat Capacity Cv measurements and an equation of state
The Journal of Chemical Thermodynamics, 2019Co-Authors: Qua Zhong, Ju She, Xueqiang Dong, Yanxing Zhao, Jingzhou Wang, Hao Guo, Haiyang Zhang, Maoqiong GongAbstract:Abstract In this paper, isochoric pρTx and specific Heat Capacity Cv for (R1234yf + R290) binary mixtures were measured using an adiabatic batch calorimeter with intermittent Heating. A total of 42 pρTx 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 (R1234yf + R290) with mole fractions of R1234yf at (0.825, 0.607, 0.521 and 0.285). The standard uncertainties were estimated to be 10 mK for temperature, 5 kPa for pressure, 0.3% for density and 1.0% for isochoric specific Heat Capacity. The experimental pρTx 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 (R1234yf + 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.
Yanxing Zhao - One of the best experts on this subject based on the ideXlab platform.
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measurements of pρtx and specific Heat Capacity Cv for r290 r1243zf binary mixtures at temperatures from 292 to 350 k and pressures up to 11 mpa
International Journal of Refrigeration-revue Internationale Du Froid, 2020Co-Authors: Owe Sheng, Qua Zhong, Xueqiang Dong, Yanxing Zhao, Jingzhou Wang, Maoqiong Gong, Ju SheAbstract:Abstract In this paper, isochoric pρTx and specific Heat Capacity (Cv) for (R290 + R1243zf) binary mixtures were measured using an adiabatic batch calorimeter with intermittent Heating. A total of 57 pρTx data points over temperatures from (292 to 350) K and 82 isochoric specific Heat Capacity data points over temperatures from (299 to 350) K were obtained for liquid with mole fractions of R290 at (0.788, 0.606, 0.435 and 0.170). The standard uncertainties were estimated to be 12 mK for temperature, 5 kPa for pressure, 0.30% for density and 0.96% for isochoric specific Heat Capacity. The experimental density and Heat Capacity data agree well with the Helmholtz equation of state (EOS) developed by Bell and Lemmon (2016), and the average absolute relative deviation (AARD) are 0.27% and 1.01%, respectively. Comparisons of the present Cv data with values calculated by the generalized equation developed by Zhong et al. (2019a) was carried out as well, and the results show good agreements with deviations varying from −3.00% to 3.16% and the average absolute relative deviation (AARD) of 0.91%.
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the isochoric specific Heat Capacity for r1234ze e at temperatures from 237 to 349 k and pressures up to 9 2 mpa
The Journal of Chemical Thermodynamics, 2020Co-Authors: Le Wang, Qua Zhong, Xueqiang Dong, Yanxing Zhao, Owe Sheng, Jie Song, Maoqiong GongAbstract:Abstract In this work, the isochoric specific Heat Capacity (Cv) of trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) in the compressed liquid states were measured using an adiabatic batch calorimeter. The temperatures ranged from (237 to 349) K and pressures up to 9.2 MPa. Measurements were obtained for a total of 112 state conditions on 22 pseudo-isochores. The standard uncertainties of temperatures, pressures and isochoric specific Heat capacities were estimated to be 12 mK, 5 kPa and 0.98%, respectively. The experimental Cv values for R1234ze(E) are compared with three equations, including two Helmholtz equations of state (EOSs) and a generalized equation based on corresponding state principle. The data in this work show good agreement, and the average absolute relative deviations are 1.37%, 1.27% and 1.59% for the above three equations, respectively.
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Measurements of pρTx and specific Heat Capacity Cv for (R290 + R1243zf) binary mixtures at temperatures from (292 to 350) K and pressures up to 11 MPa
International Journal of Refrigeration, 2020Co-Authors: Bowen Sheng, Xueqiang Dong, Yanxing Zhao, Jingzhou Wang, Maoqiong Gong, Han Yan, Quan Zhong, Jun ShenAbstract:Abstract In this paper, isochoric pρTx and specific Heat Capacity (Cv) for (R290 + R1243zf) binary mixtures were measured using an adiabatic batch calorimeter with intermittent Heating. A total of 57 pρTx data points over temperatures from (292 to 350) K and 82 isochoric specific Heat Capacity data points over temperatures from (299 to 350) K were obtained for liquid with mole fractions of R290 at (0.788, 0.606, 0.435 and 0.170). The standard uncertainties were estimated to be 12 mK for temperature, 5 kPa for pressure, 0.30% for density and 0.96% for isochoric specific Heat Capacity. The experimental density and Heat Capacity data agree well with the Helmholtz equation of state (EOS) developed by Bell and Lemmon (2016), and the average absolute relative deviation (AARD) are 0.27% and 1.01%, respectively. Comparisons of the present Cv data with values calculated by the generalized equation developed by Zhong et al. (2019a) was carried out as well, and the results show good agreements with deviations varying from −3.00% to 3.16% and the average absolute relative deviation (AARD) of 0.91%.
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a simple generalized equation for compressed liquid isochoric Heat Capacity of pure and mixture refrigerants
Fluid Phase Equilibria, 2019Co-Authors: Quan Zhong, Xueqiang Dong, Yanxing Zhao, Hao Guo, Haiyang Zhang, Bowen Sheng, Jun Shen, Maoqiong GongAbstract:Abstract This work aims to develop a generalized equation for compressed liquid isochoric specific Heat Capacity (Cv). The form of the equation was proposed based on the isochoric specific Heat Capacity calculation equation derived by the Peng-Robinson equation of state. The generalized coefficients were determined by 1734 liquid experimental Cv data from 17 refrigerants. With known critical point, acentric factor and idea gas isochoric specific Heat Capacity, the developed equation can represent the liquid Cv of 17 refrigerants well with the average absolute relative deviation of 1.55%. Large deviations are most likely to appear near the critical point. Comparisons were made to the calculation deviations from the Peng-Robinson equation of state and the multiproperty equations in REFPROP 9.1 software. It indicates that the developed equation provide a simple and reliable method for the calculation of the liquid Cv. Additionally, 9 mixture refrigerants were calculated by the proposed generalized equation with the average absolute relative deviation of 3.13%.
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thermodynamic properties of r1234yf r290 isochoric pρtx and specific Heat Capacity Cv measurements and an equation of state
The Journal of Chemical Thermodynamics, 2019Co-Authors: Qua Zhong, Ju She, Xueqiang Dong, Yanxing Zhao, Jingzhou Wang, Hao Guo, Haiyang Zhang, Maoqiong GongAbstract:Abstract In this paper, isochoric pρTx and specific Heat Capacity Cv for (R1234yf + R290) binary mixtures were measured using an adiabatic batch calorimeter with intermittent Heating. A total of 42 pρTx 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 (R1234yf + R290) with mole fractions of R1234yf at (0.825, 0.607, 0.521 and 0.285). The standard uncertainties were estimated to be 10 mK for temperature, 5 kPa for pressure, 0.3% for density and 1.0% for isochoric specific Heat Capacity. The experimental pρTx 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 (R1234yf + 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.
Kenichi Yamaya - One of the best experts on this subject based on the ideXlab platform.
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Isochoric specific Heat Capacity of trans -1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and the HFO-1234ze(E) + CO2 mixture in the liquid phase
Journal of Chemical & Engineering Data, 2011Co-Authors: Kenichi Yamaya, Atsushi Matsuguchi, Noboru Kagawa, Shigeru KoyamaAbstract:The isochoric specific Heat Capacity (Cv) of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and mole fraction x = 0.489 HFO-1234ze(E) + (1 − x) = 0.511 CO2 in the liquid phase were measured with ...
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isochoric specific Heat Capacity of trans 1 3 3 3 tetrafluoropropene hfo 1234ze e and the hfo 1234ze e co2 mixture in the liquid phase
Journal of Chemical & Engineering Data, 2011Co-Authors: Kenichi Yamaya, Atsushi Matsuguchi, Noboru Kagawa, Shigeru KoyamaAbstract:The isochoric specific Heat Capacity (Cv) of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and mole fraction x = 0.489 HFO-1234ze(E) + (1 − x) = 0.511 CO2 in the liquid phase were measured with a twin-cell type adiabatic calorimeter. The sample purity of HFO-1234ze(E) and CO2 was certified to have a minimum purity of 0.9996 mole fraction and 0.99999 mole fraction respectively by gas chromatographic analysis. The measurements were obtained for temperatures ranging from (270 to 425) K and at pressures up to 30 MPa. Temperatures were measured with a platinum resistance thermometer on the bottom of each cell and were reported based on the International Temperature Scale of 1990 (ITS-90). Sample pressures were measured with a quartz crystal transducer. Densities were calculated from the volume of the calorimeter cell and the sample mass. The expanded uncertainty (with a coverage factor k = 2) of temperature measurements is 13 mK and 8 kPa for pressure measurements. The expanded relative uncertainty of densi...
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isochoric specific Heat Capacity of trans 1 3 3 3 tetrafluoropropene hfo 1234ze e and the hfo 1234ze e co2 mixture in the liquid phase
Journal of Chemical & Engineering Data, 2011Co-Authors: Kenichi Yamaya, Atsushi Matsuguchi, Noboru Kagawa, Shigeru KoyamaAbstract:The isochoric specific Heat Capacity (Cv) of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and mole fraction x = 0.489 HFO-1234ze(E) + (1 − x) = 0.511 CO2 in the liquid phase were measured with ...
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isochoric specific Heat Capacity of difluoromethane r32 and a mixture of 51 11 mass difluoromethane r32 48 89 mass pentafluoroethane r125
International Journal of Thermophysics, 2008Co-Authors: Atsushi Matsuguchi, Kenichi Yamaya, Noboru KagawaAbstract:The isochoric Heat Capacity (Cv) of difluoromethane (R32) and a mixture of 51.11 mass% R32 + 48.89 mass% pentafluoroethane (R125) was measured at temperatures from 268 K to 328 K and at pressures up to 30 MPa. The reported density measurements are in the single-phase region and cover a range of ρ > 800 kg · m−3. The measured data are compared with results measured by other researchers. Also, the measured data are examined with available equations of state. As a result, it is found that the measured Cv’s agree well with those of other researchers in the measurement range of the present study.
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Isochoric Specific Heat Capacity of Difluoromethane (R32) and a Mixture of 51.11 mass% Difluoromethane (R32) + 48.89 mass% Pentafluoroethane (R125)
International Journal of Thermophysics, 2008Co-Authors: Atsushi Matsuguchi, Kenichi Yamaya, Noboru KagawaAbstract:The isochoric Heat Capacity (Cv) of difluoromethane (R32) and a mixture of 51.11 mass% R32 + 48.89 mass% pentafluoroethane (R125) was measured at temperatures from 268 K to 328 K and at pressures up to 30 MPa. The reported density measurements are in the single-phase region and cover a range of ρ > 800 kg · m−3. The measured data are compared with results measured by other researchers. Also, the measured data are examined with available equations of state. As a result, it is found that the measured Cv’s agree well with those of other researchers in the measurement range of the present study.
