Reference Correlation for the Thermal Conductivity of Ammonia from the Triple-Point Temperature to 680 K and Pressures up to 80 MPa

Monogenidou, S.A.; Assael, Marc J.; Huber, Marcia L.

doi:10.1063/1.5053087

Cited by 12 publications

(2 citation statements)

References 45 publications

(73 reference statements)

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“…A completely different approach, used for a variety of fluids, 54 , 63 , 126 , 131 , 201 , 221 , 246 , 248 , 285 determines the form of the residual contribution using symbolic regression. Symbolic regression is a type of genetic programming that allows the exploration of arbitrary functional forms.…”

Section: Models For Transport and Miscellaneous Properties Of Pure Fl...mentioning

confidence: 99%

The NIST REFPROP Database for Highly Accurate Properties of Industrially Important Fluids

Huber

Lemmon

Bell

et al. 2022

Ind. Eng. Chem. Res.

114

100

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The NIST REFPROP software program is a powerful tool for calculating thermophysical properties of industrially important fluids, and this manuscript describes the models implemented in, and features of, this software. REFPROP implements the most accurate models available for selected pure fluids and their mixtures that are valid over the entire fluid range including gas, liquid, and supercritical states, with the goal of uncertainties approaching the level of the underlying experimental data. The equations of state for thermodynamic properties are primarily of the Helmholtz energy form; a variety of models are implemented for the transport properties. We document the models for the 147 fluids included in the current version. A graphical user interface generates tables and provides extensive plotting capabilities. Properties can also be accessed through third-party apps or user-written code via the core property subroutines compiled into a shared library. REFPROP disseminates international standards in both the natural gas and refrigeration industries, as well as standards for water/steam.

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Section: Models For Transport and Miscellaneous Properties Of Pure Fl...mentioning

confidence: 99%

The NIST REFPROP Database for Highly Accurate Properties of Industrially Important Fluids

Huber

Lemmon

Bell

et al. 2022

Ind. Eng. Chem. Res.

114

100

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show abstract

“…In the case of the thermal conductivity, we also reported new reference correlations over extended temperature and pressure ranges, for some simple fluids (xenon [23], n-and p-hydrogen [24], water [25], deuterium oxide [26], carbon dioxide [27], ammonia [28], sulfur hexafluoride [29]), hydrocarbons (n-pentane, iso-pentane and cyclopentane [30], n-hexane [31], n-heptane [32], n-undecane [9], n-hexadecane [10], ethene and propene [33], benzene [34], toluene [35], o-, m-, and p-xylene, and ethylbenzene [36], cyclohexane [37]), alcohols (ethanol [38], ethane-1,2-diol [39]), and some refrigerants (R-1233zd(E) [40], R-161 [20], R-245fa [21], and RE-347mcc [41]).…”

Section: Introductionmentioning

confidence: 92%

Reference Correlations of the Viscosity and Thermal Conductivity of 1-Hexene from the Triple Point to High Temperatures and Pressures

et al. 2023

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This paper presents new wide-ranging correlations for the viscosity and thermal conductivity of 1-hexene based on critically evaluated experimental data. The viscosity correlation is valid from the triple point to 580 K and up to 245 MPa pressure, while the thermal conductivity is valid from the triple point to 620 K and 200 MPa pressure. Both correlations are designed to be used with a recently published equation of state that extends from the triple point to 535 K, at pressures up to 245 MPa. The estimated uncertainty (at a 95 % confidence level) for the viscosity is 2 % for the low-density gas (pressures below 0.5 MPa), and 4.8 % over the rest of the range of application. For thermal conductivity, the expanded uncertainty is estimated to be 3 % for the low-density gas and 4 % over the rest of the range.

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A new analytical modeling for the determination of thermodynamic quantities of refrigerants

Ghandili¹,

Moeini

2020

AIChE Journal

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A new analytical fundamental equation of state (EOS) is presented for fluids. The equation is explicit in the effective molecular potentials and allows calculation of all thermodynamic properties over the whole fluid surface (gas, liquid, supercritical and gas–liquid phase transition). Outside the critical area (± 0.05Tc), it is valid in a vast range of temperature and pressure (0.8Tc to 7.5Tc and up to 120Pc,). The EOS is applicable for a variety of refrigerants such as C3H2F4 (HFO‐1234ze (E)), hydrofluorocarbons (HFCs) including C3F8 (R218), C3H2F6 (R236ea), C3H2F6 (R236fa), C3H3F5 (R245ca), C3HF7, C4F8 (RC318), C4F10, C5F12, natural refrigerants including NH3, CO2, hydrocarbons, monatomic gases and some other fluids. Calculations of second derivatives properties of fluids are sensitive tests of EOS behavior. Therefore, estimation of the thermodynamic properties including Joule‐Thomson coefficient, μJT, and speed of sound, w, has been considered.

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Reference Correlation for the Thermal Conductivity of Ammonia from the Triple-Point Temperature to 680 K and Pressures up to 80 MPa

Cited by 12 publications

References 45 publications

The NIST REFPROP Database for Highly Accurate Properties of Industrially Important Fluids

The NIST REFPROP Database for Highly Accurate Properties of Industrially Important Fluids

Reference Correlations of the Viscosity and Thermal Conductivity of 1-Hexene from the Triple Point to High Temperatures and Pressures

A new analytical modeling for the determination of thermodynamic quantities of refrigerants

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