Calculation of the Thermodynamic Properties of Methane up to 30 MPa Using a New Equation of State with Regular and Scale Parts and Few Constants Full article
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High Temperature
ISSN: 0018-151X , E-ISSN: 1608-3156 |
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| Output data | Year: 2023, Volume: 61, Number: 3, Pages: 328 - 338 Pages count : 11 DOI: 10.1134/S0018151X23020037 | ||||
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Abstract:
The heat capacities Cv , Cp and speed of sound W of methane were calculated by a new equation of
state with few adjustable constants. The equation includes a new regular part with 13 coefficients and a scale
part with 6 coefficients with a regular crossover function containing two fitting parameters. The constants in
the equation of state were determined using only (p, ρ, T) data for СH4; no data on Cv , Cp, and W were
employed, except for the data on isochoric heat capacity Cv in the ideal-gas state and value of Cv at 100 K on
the liquid branch on the liquid–vapor equilibrium curve. The calculated values of Cv, Cp, and W are close to
the experimental and tabulated values in the regular region. Calculations in the critical region uses universal
critical indices α, β, γ according to the three-dimensional Ising model. A discrepancy with the tabulated data
is caused by application of the scaling equation of state. The calculated values are compared with the predictions
by the known crossover equations of state for СH4. The root-mean-square error in the description of
СH4 pressure is σр = 0.5%, the mean absolute deviation is 0.3%, the uncertainty in Cv does not exceed 5%.
Cite:
Bezverkhii P.P.
, Dutova O.S.
Calculation of the Thermodynamic Properties of Methane up to 30 MPa Using a New Equation of State with Regular and Scale Parts and Few Constants
High Temperature. 2023. V.61. N3. P.328 - 338. DOI: 10.1134/S0018151X23020037 WOS Scopus РИНЦ OpenAlex
Calculation of the Thermodynamic Properties of Methane up to 30 MPa Using a New Equation of State with Regular and Scale Parts and Few Constants
High Temperature. 2023. V.61. N3. P.328 - 338. DOI: 10.1134/S0018151X23020037 WOS Scopus РИНЦ OpenAlex
Original:
Безверхий П.П.
, Дутова О.С.
Расчет термодинамических свойств метана до 30 МПа по новому малоконстантному уравнению с регулярной и масштабной частями
Теплофизика Высоких Температур. 2023. Т.61. №3. С.358-369. DOI: 10.31857/S0040364423020035 РИНЦ OpenAlex
Расчет термодинамических свойств метана до 30 МПа по новому малоконстантному уравнению с регулярной и масштабной частями
Теплофизика Высоких Температур. 2023. Т.61. №3. С.358-369. DOI: 10.31857/S0040364423020035 РИНЦ OpenAlex
Dates:
| Submitted: | Jun 14, 2022 |
| Accepted: | Oct 13, 2022 |
| Published print: | Mar 7, 2024 |
Identifiers:
| Web of science: | WOS:001181400200002 |
| Scopus: | 2-s2.0-85187893254 |
| Elibrary: | 65107727 |
| OpenAlex: | W4392680193 |