Viscosity of Compressed Liquid 1,1,1-Trifluoroethane (HFC-143a) and Pentafluoroethane (HFC-125)

Avelino, Helena Maria da Nóbrega Teixeira; Fareleira, João M. N. A.; Oliveira, Carla Padrel de

doi:10.1021/je0601356

Cited by 35 publications

(32 citation statements)

References 32 publications

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“…This method has been employed to study a diverse range of materials 17 , showing a high accuracy for refrigerants. 10,18,19 In the RHS model, the characteristic viscosity η * is defined as follow:…”

Section: Viscosity Data Correlation Using Rhs Methodsmentioning

confidence: 99%

Liquid viscosity of low-GWP refrigerant mixtures (R32+R1234yf) and (R125+R1234yf)

Dang

Kamiaka

Dang

et al. 2015

The Journal of Chemical Thermodynamics

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Section: Viscosity Data Correlation Using Rhs Methodsmentioning

confidence: 99%

Liquid viscosity of low-GWP refrigerant mixtures (R32+R1234yf) and (R125+R1234yf)

Dang

Kamiaka

Dang

et al. 2015

The Journal of Chemical Thermodynamics

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“…Lennard-Jones parameters were obtained by fitting the gas-phase viscosity data of Takahashi et al (Takahashi, Shibasaki-Kitakawa, & Yokoyama, 1999) and Wang et al (X. Wang, Wu, & Liu, 2009). Liquid-phase data of Ripple and Defibaugh (Ripple & Defibaugh, 1997) and Avelino et al (Avelino, Fareleira, & Oliveira, 2006) were used to obtain the coefficients in Table 2. Deviation plots as a function of temperature and of pressure are shown in Figures 105 and 106.…”

Section: R1123 (Trifluoroethylene)mentioning

confidence: 99%

Models for viscosity, thermal conductivity, and surface tension of selected pure fluids as implemented in REFPROP v10.0

Huber¹

2018

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We describe models for the viscosity, thermal conductivity, and surface tension for selected fluids implemented in version 10.0 of the NIST computer program, NIST Standard Reference Database 23, also known as NIST Reference Fluid Thermodynamic and Transport Properties Database (REFPROP). These fluids do not presently have published reference fluid quality models in the open literature, so we provide preliminary models based on available data as an interim measure to allow calculations of these properties. Comparisons with available experimental data are given.

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“…The water content before and after the viscosity measurements was (99 and 175) mg kg À1 , respectively. This correlation scheme was used previously to correlate viscosity data for dimethyl adipate [53], 2,2,4-trimethylpentane [56], HFC134a [57], toluene [58], HFC-143a and HFC-125 [59], R507 A [60], and for constructing a reference correlation for the viscosity of toluene [14] in wide ranges of temperature and pressure.…”

Section: Correlation Of the Viscosity With Density Using A Hard-sphermentioning

confidence: 99%

Tris(2-ethylhexyl) trimellitate (TOTM) a potential reference fluid for high viscosity. Part I: Viscosity measurements at temperatures from (303 to 373) K and pressures up to 65 MPa, using a novel vibrating-wire instrument

Diogo

Avelino

Caetano

et al. 2014

Fluid Phase Equilibria

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A B S T R A C TThe article reports viscosity measurements of compressed liquid tris(2-ethylhexyl) trimellitate or 1,2,4-Benzenetricarboxylic acid, tris(2-ethylhexyl) ester (TOTM) which is an important plasticizer in the polymer industry and has wide applications as a lubricant. Nevertheless, the main motivation for the present work is to propose TOTM as a plausible candidate for an industrial viscosity reference fluid for high viscosity, high pressure and high temperature. This kind of reference fluid is presently on demand by oil industries and the International Association for Transport Properties is developing efforts aiming to select appropriate candidates and to establish the corresponding reference data.The viscosity measurements were performed with a novel vibrating wire sensor. The new instrument was designed for operation at high pressures (up to 100 MPa) and temperatures up to 373 K. The present measurements were obtained using the vibrating wire sensor in the forced oscillation or steady-state mode of operation. The viscosity measurements were carried out up to 65 MPa and at six temperatures from (303 to 373) K.The viscosity results were correlated with density, using a modified hard-spheres scheme. The root mean square deviation of the data from the correlation is 0.53% and the maximum absolute relative deviation was less than 1.7%. The expanded uncertainty of the present viscosity results, at a 95% confidence level, is estimated to be less than AE2% for viscosities up to 68 mPa s, less than AE2.6% for viscosities between (69 and 268) mPa s and less than AE3% for higher viscosities.The TOTM density data necessary to compute the viscosity results were measured using a vibrating Utube densimeter, model DMA HP and are described in part II of the present work.No literature data above atmospheric pressure could be found for the viscosity of TOTM. As a consequence, the present viscosity results could only be compared upon extrapolation of the vibrating wire data to 0.1 MPa. Independent viscosity measurements were performed, at atmospheric pressure, using an Ubbelohde capillary in order to compare with the vibrating wire results, extrapolated by means of the above mentioned correlation. The two data sets agree within AE1%, which is commensurate with the mutual uncertainty of the experimental methods. Comparisons of the literature data obtained at atmospheric pressure with the present extrapolated vibrating-wire viscosity measurements have shown an agreement within AE2% for temperatures up to 339 K and within AE3.3% for temperatures up to 368 K.

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Viscosity of Compressed Liquid 1,1,1-Trifluoroethane (HFC-143a) and Pentafluoroethane (HFC-125)

Cited by 35 publications

References 32 publications

Liquid viscosity of low-GWP refrigerant mixtures (R32+R1234yf) and (R125+R1234yf)

Liquid viscosity of low-GWP refrigerant mixtures (R32+R1234yf) and (R125+R1234yf)

Models for viscosity, thermal conductivity, and surface tension of selected pure fluids as implemented in REFPROP v10.0

Tris(2-ethylhexyl) trimellitate (TOTM) a potential reference fluid for high viscosity. Part I: Viscosity measurements at temperatures from (303 to 373) K and pressures up to 65 MPa, using a novel vibrating-wire instrument

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