Documentation and assessment of the transport property model for mixtures
                        implemented in NIST REFPROP (version 8.0)

Chichester, Justin C.; Huber, Marcia L.

doi:10.6028/nist.ir.6650

Cited by 50 publications

(140 citation statements)

References 65 publications

Supporting

Mentioning

122

Contrasting

Order By: Relevance

“…The thermodynamic properties needed for the above-described corrections could be calculated with sufficient accuracy employing the EOS-CG of Gernert and Span [1]. The required transport properties were estimated for the mixtures with REFPROP 9.1 [14] based on the extended corresponding states models described by Huber et al [15] and assessed by Chichester and Huber [16]. …”

Section: Methodsmentioning

confidence: 99%

Speed-of-sound measurements in (argon + carbon dioxide) over the temperature range from (275 to 500) K at pressures up to 8 MPa

Wegge

McLinden

Perkins

et al. 2016

The Journal of Chemical Thermodynamics

View full text Add to dashboard Cite

The speed of sound of two (argon + carbon dioxide) mixtures was measured over the temperature range from (275 to 500) K with pressures up to 8 MPa utilizing a spherical acoustic resonator. The compositions of the gravimetrically prepared mixtures were (0.50104 and 0.74981) mole fraction carbon dioxide. The vibrational relaxation of pure carbon dioxide led to high sound absorption, which significantly impeded the sound-speed measurements on carbon dioxide and its mixtures; pre-condensation may have also affected the results for some measurements near the dew line. Thus, in contrast to the standard operating procedure for speed-of-sound measurements with a spherical resonator, non-radial resonances at lower frequencies were taken into account. Still, the data show a comparatively large scatter, and the usual repeatability of this general type of instrument could not be realized with the present measurements. Nonetheless, the average relative combined expanded uncertainty (k = 2) in speed of sound ranged from (0.042 to 0.056)% for both mixtures, with individual state-point uncertainties increasing to 0.1%. These uncertainties are adequate for our intended purpose of evaluating thermodynamic models. The results are compared to a Helmholtz energy equation of state for carbon capture and storage applications; relative deviations of (−0.64 to 0.08)% for the (0.49896 argon + 0.50104 carbon dioxide) mixture, and of (−1.52 to 0.77)% for the (0.25019 argon + 0.74981 carbon dioxide) mixture were observed.

show abstract

Section: Methodsmentioning

confidence: 99%

Speed-of-sound measurements in (argon + carbon dioxide) over the temperature range from (275 to 500) K at pressures up to 8 MPa

Wegge

McLinden

Perkins

et al. 2016

The Journal of Chemical Thermodynamics

View full text Add to dashboard Cite

show abstract

“…As a result, we provide here some models (considered preliminary) that can be used to compute thermophysical properties in REFPROP until more data and better models become available. A previous publication (5) described the extended corresponding states model for viscosity and thermal conductivity implemented in REFPROP, which is based on the earlier publications by Ely and Hanley (6,7). This method is also discussed in additional publications (8)(9)(10)(11)(12); here we will present the coefficients and comparisons with data; the reader is referred to earlier publications for details on the methodology.…”

Section: Introductionmentioning

confidence: 99%

Preliminary models for viscosity, thermal conductivity, and surface tension of pure fluid constituents of selected diesel surrogate fuels

Huber¹

2017

Self Cite

View full text Add to dashboard Cite

We describe preliminary models for the viscosity, thermal conductivity, and surface tension for pure fluids that are constituents of four surrogate fuels for ultralow-sulfur diesel fuels developed under the auspices of the Coordinating Research Council (CRC). These fluids do not presently have published reference fluid quality models in the open literature, so we provide here preliminary models based on available data as an interim measure to allow calculations of these properties for both the pure fluids and the four surrogate mixtures. Comparisons with selected experimental pure-fluid data are given, and text files compatible with the NIST REFPROP computer program are included as supplementary material. We also present tabulations of the viscosity, thermal conductivity, and surface tension along the bubble point for four surrogate fuels.

show abstract

“…A performance comparison is also conducted in the similar transcritical cycle using CO 2 as the refrigerant. The N 2 O property data were obtained from REFPROP [ 22 ].…”

Section: Thermodynamic Modelingmentioning

confidence: 99%

Energetic and Exergetic Analysis of a Transcritical N2O Refrigeration Cycle with an Expander

Zhang

Hou

Kulacki

2018

Entropy

View full text Add to dashboard Cite

Abstract:Comparative energy and exergy investigations are reported for a transcritical N 2 O refrigeration cycle with a throttling valve or with an expander when the gas cooler exit temperature varies from 30 to 55 • C and the evaporating temperature varies from −40 to 10 • C. The system performance is also compared with that of similar cycles using CO 2 . Results show that the N 2 O expander cycle exhibits a larger maximum cooling coefficient of performance (COP) and lower optimum discharge pressure than that of the CO 2 expander cycle and N 2 O throttling valve cycle. It is found that in the N 2 O throttling valve cycle, the irreversibility of the throttling valve is maximum and the exergy losses of the gas cooler and compressor are ordered second and third, respectively. In the N 2 O expander cycle, the largest exergy loss occurs in the gas cooler, followed by the compressor and the expander. Compared with the CO 2 expander cycle and N 2 O throttling valve cycle, the N 2 O expander cycle has the smallest component-specific exergy loss and the highest exergy efficiency at the same operating conditions and at the optimum discharge pressure. It is also proven that the maximum COP and the maximum exergy efficiency cannot be obtained at the same time for the investigated cycles.

show abstract

Documentation and assessment of the transport property model for mixtures implemented in NIST REFPROP (version 8.0)

Cited by 50 publications

References 65 publications

Speed-of-sound measurements in (argon + carbon dioxide) over the temperature range from (275 to 500) K at pressures up to 8 MPa

Speed-of-sound measurements in (argon + carbon dioxide) over the temperature range from (275 to 500) K at pressures up to 8 MPa

Preliminary models for viscosity, thermal conductivity, and surface tension of pure fluid constituents of selected diesel surrogate fuels

Energetic and Exergetic Analysis of a Transcritical N2O Refrigeration Cycle with an Expander

Contact Info

Product

Resources

About