Density Data for the Refrigerant Ethyl Fluoride (HFC-161) over a Temperature Range from (230 to 344) K

Han, Xiaoxiang; Xu, Ying; Min, Xu; Gao, Zan; Wang, Qin; Chen, Guang Ming

doi:10.1021/je2000827

Cited by 24 publications

(16 citation statements)

References 16 publications

(17 reference statements)

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“…This is probably because of low number of available experimental data. In Figure 11 we show also coexistence densities meassured recently by Han et al [35]; these data differ considerably from the Refprop values. We are not able to decide, whether there is a problem in parametrization of the Refprop EoS because of small number of data, because of low quality of data or whether the data of Han et al are errorneous.…”

Section: Model Csupporting

confidence: 49%

A generalized Kiselev crossover approach applied to Soave–Redlich–Kwong equation of state

Janeček

Paricaud

Dicko

et al. 2015

Fluid Phase Equilibria

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Three different variants of the crossover Soave-Redlich-Kwong equation of state are applied to describe the equilibrium behaviour of 72 common fluids -27 hydrocarbons (including the first 10 n-alkanes), 36 halogenated refrigerants, 5 cryogenics (fluorine, oxygene, nitrogene, argon and carbon monoxide) and 4 other industrially important inorganic fluids (carbon dioxide, sulfur dioxide, nitrous oxide and sulfur hexafluoride). The model contains six compound dependent parameters; two of them (a 0 and b of the classical part) are adjusted to reproduce the critical temperature and the critical pressure. Within the first approach (model A), the remaining four parameters -the softness of dispersion interactions m and three parameters of the crossover part (G i , d 1 and v 1 ) -are optimized to reproduce the coexistence densities and the saturation pressure over the whole vapor-liquid region and also the pressure along the critical-and one supercritical isotherms. In the second model (model B), mutual relation between two of the crossover parameters is employed (v 1 = v 1 (G i )) and distersion softness m is expressed as a qudratic function of acentric factor ω. Using these two constrains, the crossover parameter G i (and also v 1 ) becomes correlated to rectlinear diameter r d or 1 critical compression factor Z c . It is also found, that the crossover parameter d 1 has a minor effect on the equilibrium properties. In the third model (model C), this parameter is omitted and the remaining parameters are estimated from knowledge of critical properties (a 0 and b), acentric factor (m) and rectlinear diameter (G i ). The overall quality of model C -which requires only the knowledge of the critical properties, acentric factor and rectlinear diameter -is worse compared to the two models with fitted parameters. However, it is superior to classical cubic equations of state as for the liquid coexistence densities and superior to equations optimized to reproduce the liquid densities (PCSAFT, CPA) as for the description in the critical region. The model C is applied to describe the equilibrium behaviour of two compounds not included in the parametrization, hexafluoropropene (HFO1216) and hexafluoropropene oxide (HFPO), with acceptable quality.

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Section: Model Csupporting

confidence: 49%

A generalized Kiselev crossover approach applied to Soave–Redlich–Kwong equation of state

Janeček

Paricaud

Dicko

et al. 2015

Fluid Phase Equilibria

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“…Physical properties of the liquefied gas electrolytes studied. Vapor pressure, density, relative dielectric, and viscosity values taken as a saturated liquid at +20°C under saturated vapor pressure, except where noted(8,16,18,(48)(49)(50)(51)(52)(53)(54)(55).…”

mentioning

confidence: 99%

Liquefied gas electrolytes for electrochemical energy storage devices

Rustomji

Yang

Kim

et al. 2017

Science

314

257

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Electrochemical capacitors and lithium-ion batteries have seen little change in their electrolyte chemistry since their commercialization, which has limited improvements in device performance. Combining superior physical and chemical properties and a high dielectric-fluidity factor, the use of electrolytes based on solvent systems that exclusively use components that are typically gaseous under standard conditions show a wide potential window of stability and excellent performance over an extended temperature range. Electrochemical capacitors using difluoromethane show outstanding performance from -78° to +65°C, with an increased operation voltage. The use of fluoromethane shows a high coulombic efficiency of ~97% for cycling lithium metal anodes, together with good cyclability of a 4-volt lithium cobalt oxide cathode and operation as low as -60°C, with excellent capacity retention.

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“…Owing to the better performance relative to the pure refrigerant, mixed refrigerants especially the azeotropic mixtures are considered to be much promising alternative refrigerants. − Reliable vapor–liquid equilibrium (VLE) data and pressure–density–temperature−mole fraction ( pρTx ) data of mixed refrigerants are essential for evaluating its performance in the refrigeration cycle. Many studies for VLE, − pρTx properties, − bubble point pressure, and saturated liquid density measurements − can be found in the open literature. The azeotropic mixture of R1234ze(E) + R290 is one promising alternative refrigerant, as the flammability of R290 could be reduced by adding R1234ze(E) .…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Saturated Liquid Density and Bubble Point Pressure for R1234ze(E) + R290

et al. 2016

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Saturated liquid densities and bubble point pressures of trans-1,3,3,3-tetrafluoropropene (R1234ze(E)) + propane (R290) binary mixture were measured at temperatures from (253.141 to 293.284) K and mole fractions of R1234ze(E) from (0.1746 to 0.8803) using a compact single-sinker densimeter. The standard uncertainties were estimated to be less than 5 mK for temperature, 600 Pa for pressure, 0.003 for mole fraction, and 0.01% for density. The experimental saturated liquid densities were reproduced by the VDNS and our modified Rackett density equations, while the experimental bubble point pressures were represented with the Patel–Teja (PT) equation of state. Good agreement between values of calculation and experiment were found for both saturated liquid densities and bubble point pressures. In addition, saturated vapor and liquid densities of azeotropy point at temperatures T = (258.150, 263.150, 273.150 and 283.150) K were determined.

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Density Data for the Refrigerant Ethyl Fluoride (HFC-161) over a Temperature Range from (230 to 344) K

Cited by 24 publications

References 16 publications

A generalized Kiselev crossover approach applied to Soave–Redlich–Kwong equation of state

A generalized Kiselev crossover approach applied to Soave–Redlich–Kwong equation of state

Liquefied gas electrolytes for electrochemical energy storage devices

Experimental Study on the Saturated Liquid Density and Bubble Point Pressure for R1234ze(E) + R290

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