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Maoqiong Gong - One of the best experts on this subject based on the ideXlab platform.
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the isochoric special heat capacity for 3 3 3 trifluoroprop 1 ene r1243zf at temperatures from 299 to 351 k and pressures up to 11 mpa
The Journal of Chemical Thermodynamics, 2021Co-Authors: Bowen Sheng, Xueqiang Dong, Yanxing Zhao, Jun Shen, Wei Liu, Xiaogang Chen, Han Yan, Maoqiong GongAbstract:Abstract In this paper, isochoric specific heat capacity (cv) of 3,3,3-trifluoroprop-1-ene (R1243zf) in Compressed Liquid states were measured using an adiabatic batch calorimeter with intermittent heating. A total of 64 isochoric specific heat capacity data points over temperatures from (299 to 351) K and pressures up to 11 MPa was obtained for Liquid R1243zf. The standard uncertainties were estimated to be 12 mK for temperature, 5 kPa for pressure, 0.20% for density and 0.87% for isochoric specific heat capacity. The experimental heat capacity data show good agreements with a Helmholtz equation of states (EOS) from Ref. [2], and the average absolute relative deviation (AARD) is 2.42%. A comparison of the present cv data with values calculated by the generalized equation of Zhong et al. (2019) [3] was carried out as well, and the results show good agreements and the deviations vary from −0.98% to 3.62% and the average absolute relative deviation (AARD) is 0.89%. Compared with the Helmholtz EOS, the generalized equation gives a better description for the data in this work.
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a vibrating wire viscometer and measured viscosity data of Compressed Liquid carbon dioxide at temperatures from 218 150 to 273 150 k and pressures up to 13 mpa
Journal of Molecular Liquids, 2020Co-Authors: Jingzhou Wang, Xueqiang Dong, Yanxing Zhao, Quan Zhong, Fengyuan Wang, Xiaoyu Yao, Maoqiong GongAbstract:Abstract A vibrating-wire viscometer has been developed to measure the viscosity of Compressed Liquid. The experimental apparatus was calibrated by the Compressed Liquid propane along isotherms from (213.150 to 273.150) K and pressures up to 13 MPa. The experimental data were compared with the values calculated by a correlation proposed by Vogel et al., good agreement is found with an average absolute relative deviation (AARD) of 0.48%. The standard measurement uncertainties were estimated to be 7.7 mK for temperature and 0.0021 MPa for pressure, and the combined relative expanded uncertainty of viscosity measurement was calculated to be 2.9% (k = 2). Moreover, the experimental viscosity data of Compressed Liquid carbon dioxide were obtained in the temperatures from (218.150 to 273.150) K and pressures up to 13 MPa. The experimental data were compared with the values calculated by a correlation proposed by Fenghour et al., and the deviations between this work and the correlation vary from −2.1% to 1.8% and the AARD is 1.1%. The experimental results were represented by a hard-sphere model with an AARD of 0.74%.
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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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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, Haiyang Zhang, Hao Yu-guo, 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, Haiyang Zhang, Hao Yu-guo, 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.
Claudio Zilio - One of the best experts on this subject based on the ideXlab platform.
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hcfo refrigerant cis 1 chloro 2 3 3 3 tetrafluoropropene r1224yd z experimental assessment and correlation of the Liquid density
International Journal of Refrigeration-revue Internationale Du Froid, 2020Co-Authors: Laura Fedele, Sergio Bobbo, Claudio Zilio, Ryo Akasaka, Mauro ScattoliniAbstract:Abstract In the search for substitutes for high global warming potential (GWP) refrigerants, measurements of thermodynamic properties for refrigerants belonging to new halogenated olefins group (HFO) is of strict actuality, due to their GWP, close to that of natural refrigerants, and the lack of information on their properties. One of the most interesting HFOs is cis-1-chloro-2,3,3,3-tetrafluoropropene (R1224yd(Z)), suitable, for its relatively high NBP (287.15 K) and its low vapour pressure, to be used in applications such as Organic Rankine Cycles (ORC), industrial high temperature heat pumps or centrifugal chillers. The paper presents 90 experimental Compressed Liquid density data for R1224yd(Z) in a range of temperatures and pressures varying from 283.15 K and 363.15 K and from close to saturation pressure up to 35 MPa, respectively. The data were measured by means of a vibrating tube densimeter at isothermal conditions. By extrapolating the isothermal Compressed Liquid density data at the saturated pressure, 10 saturated Liquid density values have also been obtained. A Tait correlation for the Compressed Liquid density data and a dedicated correlation for the saturated Liquid density are presented. Both correlations well represent the experimental data, with a percentage absolute average deviation (AAD%) of 0.1% in both cases. Experimental Liquid density data have been compared to literature through the most updated version of the fundamental equation of state proposed by (Akasaka et al., 2017). The equation shows a very good agreement with the present data, considering that most of the data are in the extrapolation areas of the equation.
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Compressed Liquid density measurements for 2 3 3 3 tetrafluoroprop 1 ene r1234yf
Journal of Chemical & Engineering Data, 2012Co-Authors: Laura Fedele, Andrea Ferron, Steven J Brown, Laura Colla, Sergio Bobbo, Claudio ZilioAbstract:A total of 13 796 Compressed Liquid density measurements for 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) for eight isotherms evenly spaced from (283.15 to 353.15) K for pressures from near saturation to 35 MPa are presented. In addition, a saturated Liquid density correlation and a Tait correlation are developed.
Laura Fedele - One of the best experts on this subject based on the ideXlab platform.
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hcfo refrigerant cis 1 chloro 2 3 3 3 tetrafluoropropene r1224yd z experimental assessment and correlation of the Liquid density
International Journal of Refrigeration-revue Internationale Du Froid, 2020Co-Authors: Laura Fedele, Sergio Bobbo, Claudio Zilio, Ryo Akasaka, Mauro ScattoliniAbstract:Abstract In the search for substitutes for high global warming potential (GWP) refrigerants, measurements of thermodynamic properties for refrigerants belonging to new halogenated olefins group (HFO) is of strict actuality, due to their GWP, close to that of natural refrigerants, and the lack of information on their properties. One of the most interesting HFOs is cis-1-chloro-2,3,3,3-tetrafluoropropene (R1224yd(Z)), suitable, for its relatively high NBP (287.15 K) and its low vapour pressure, to be used in applications such as Organic Rankine Cycles (ORC), industrial high temperature heat pumps or centrifugal chillers. The paper presents 90 experimental Compressed Liquid density data for R1224yd(Z) in a range of temperatures and pressures varying from 283.15 K and 363.15 K and from close to saturation pressure up to 35 MPa, respectively. The data were measured by means of a vibrating tube densimeter at isothermal conditions. By extrapolating the isothermal Compressed Liquid density data at the saturated pressure, 10 saturated Liquid density values have also been obtained. A Tait correlation for the Compressed Liquid density data and a dedicated correlation for the saturated Liquid density are presented. Both correlations well represent the experimental data, with a percentage absolute average deviation (AAD%) of 0.1% in both cases. Experimental Liquid density data have been compared to literature through the most updated version of the fundamental equation of state proposed by (Akasaka et al., 2017). The equation shows a very good agreement with the present data, considering that most of the data are in the extrapolation areas of the equation.
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Compressed Liquid density measurements for 2 3 3 3 tetrafluoroprop 1 ene r1234yf
Journal of Chemical & Engineering Data, 2012Co-Authors: Laura Fedele, Andrea Ferron, Steven J Brown, Laura Colla, Sergio Bobbo, Claudio ZilioAbstract:A total of 13 796 Compressed Liquid density measurements for 2,3,3,3-tetrafluoroprop-1-ene (R1234yf) for eight isotherms evenly spaced from (283.15 to 353.15) K for pressures from near saturation to 35 MPa are presented. In addition, a saturated Liquid density correlation and a Tait correlation are developed.
Yanxing Zhao - One of the best experts on this subject based on the ideXlab platform.
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the isochoric special heat capacity for 3 3 3 trifluoroprop 1 ene r1243zf at temperatures from 299 to 351 k and pressures up to 11 mpa
The Journal of Chemical Thermodynamics, 2021Co-Authors: Bowen Sheng, Xueqiang Dong, Yanxing Zhao, Jun Shen, Wei Liu, Xiaogang Chen, Han Yan, Maoqiong GongAbstract:Abstract In this paper, isochoric specific heat capacity (cv) of 3,3,3-trifluoroprop-1-ene (R1243zf) in Compressed Liquid states were measured using an adiabatic batch calorimeter with intermittent heating. A total of 64 isochoric specific heat capacity data points over temperatures from (299 to 351) K and pressures up to 11 MPa was obtained for Liquid R1243zf. The standard uncertainties were estimated to be 12 mK for temperature, 5 kPa for pressure, 0.20% for density and 0.87% for isochoric specific heat capacity. The experimental heat capacity data show good agreements with a Helmholtz equation of states (EOS) from Ref. [2], and the average absolute relative deviation (AARD) is 2.42%. A comparison of the present cv data with values calculated by the generalized equation of Zhong et al. (2019) [3] was carried out as well, and the results show good agreements and the deviations vary from −0.98% to 3.62% and the average absolute relative deviation (AARD) is 0.89%. Compared with the Helmholtz EOS, the generalized equation gives a better description for the data in this work.
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a vibrating wire viscometer and measured viscosity data of Compressed Liquid carbon dioxide at temperatures from 218 150 to 273 150 k and pressures up to 13 mpa
Journal of Molecular Liquids, 2020Co-Authors: Jingzhou Wang, Xueqiang Dong, Yanxing Zhao, Quan Zhong, Fengyuan Wang, Xiaoyu Yao, Maoqiong GongAbstract:Abstract A vibrating-wire viscometer has been developed to measure the viscosity of Compressed Liquid. The experimental apparatus was calibrated by the Compressed Liquid propane along isotherms from (213.150 to 273.150) K and pressures up to 13 MPa. The experimental data were compared with the values calculated by a correlation proposed by Vogel et al., good agreement is found with an average absolute relative deviation (AARD) of 0.48%. The standard measurement uncertainties were estimated to be 7.7 mK for temperature and 0.0021 MPa for pressure, and the combined relative expanded uncertainty of viscosity measurement was calculated to be 2.9% (k = 2). Moreover, the experimental viscosity data of Compressed Liquid carbon dioxide were obtained in the temperatures from (218.150 to 273.150) K and pressures up to 13 MPa. The experimental data were compared with the values calculated by a correlation proposed by Fenghour et al., and the deviations between this work and the correlation vary from −2.1% to 1.8% and the AARD is 1.1%. The experimental results were represented by a hard-sphere model with an AARD of 0.74%.
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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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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, Haiyang Zhang, Hao Yu-guo, 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, Haiyang Zhang, Hao Yu-guo, 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.
Xueqiang Dong - One of the best experts on this subject based on the ideXlab platform.
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the isochoric special heat capacity for 3 3 3 trifluoroprop 1 ene r1243zf at temperatures from 299 to 351 k and pressures up to 11 mpa
The Journal of Chemical Thermodynamics, 2021Co-Authors: Bowen Sheng, Xueqiang Dong, Yanxing Zhao, Jun Shen, Wei Liu, Xiaogang Chen, Han Yan, Maoqiong GongAbstract:Abstract In this paper, isochoric specific heat capacity (cv) of 3,3,3-trifluoroprop-1-ene (R1243zf) in Compressed Liquid states were measured using an adiabatic batch calorimeter with intermittent heating. A total of 64 isochoric specific heat capacity data points over temperatures from (299 to 351) K and pressures up to 11 MPa was obtained for Liquid R1243zf. The standard uncertainties were estimated to be 12 mK for temperature, 5 kPa for pressure, 0.20% for density and 0.87% for isochoric specific heat capacity. The experimental heat capacity data show good agreements with a Helmholtz equation of states (EOS) from Ref. [2], and the average absolute relative deviation (AARD) is 2.42%. A comparison of the present cv data with values calculated by the generalized equation of Zhong et al. (2019) [3] was carried out as well, and the results show good agreements and the deviations vary from −0.98% to 3.62% and the average absolute relative deviation (AARD) is 0.89%. Compared with the Helmholtz EOS, the generalized equation gives a better description for the data in this work.
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a vibrating wire viscometer and measured viscosity data of Compressed Liquid carbon dioxide at temperatures from 218 150 to 273 150 k and pressures up to 13 mpa
Journal of Molecular Liquids, 2020Co-Authors: Jingzhou Wang, Xueqiang Dong, Yanxing Zhao, Quan Zhong, Fengyuan Wang, Xiaoyu Yao, Maoqiong GongAbstract:Abstract A vibrating-wire viscometer has been developed to measure the viscosity of Compressed Liquid. The experimental apparatus was calibrated by the Compressed Liquid propane along isotherms from (213.150 to 273.150) K and pressures up to 13 MPa. The experimental data were compared with the values calculated by a correlation proposed by Vogel et al., good agreement is found with an average absolute relative deviation (AARD) of 0.48%. The standard measurement uncertainties were estimated to be 7.7 mK for temperature and 0.0021 MPa for pressure, and the combined relative expanded uncertainty of viscosity measurement was calculated to be 2.9% (k = 2). Moreover, the experimental viscosity data of Compressed Liquid carbon dioxide were obtained in the temperatures from (218.150 to 273.150) K and pressures up to 13 MPa. The experimental data were compared with the values calculated by a correlation proposed by Fenghour et al., and the deviations between this work and the correlation vary from −2.1% to 1.8% and the AARD is 1.1%. The experimental results were represented by a hard-sphere model with an AARD of 0.74%.
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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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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, Haiyang Zhang, Hao Yu-guo, 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, Haiyang Zhang, Hao Yu-guo, 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.