Equation of state of an equimolar He3–He4 mixture

Karnatsevich, L. V.; Sibileva, R. M.; Khazhmuradov, M. A.; Shapoval, I.; Meriuz, A. V.

doi:10.1063/1.1476576

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…The type of graphs coincides with the data of other researchers [1][2][3][4][5], which confirms the reliability of the calculation results.…”

Section: Fig 2 Results Of a Computer Calculation Of The Kinetics Of N...supporting

confidence: 90%

“…The highest amount of NO 2 (9.62-10 -5 %) occurs at α=1.1, and then decreases and becomes equal to 2.61-10 -5 % at α=1. 4.…”

Section: Fig 2 Results Of a Computer Calculation Of The Kinetics Of N...mentioning

confidence: 99%

“…In the calculations, the volume of the truck body was varied from 8 m 3 (MAZ-53) to 52 m 3 (KAMAZ-54 specialized truck for grain transportation) [3,4].…”

mentioning

confidence: 99%

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The influence of biogas content on the emission of harmful impurities and the introduction of greenhouse gas emission methodology

Kuris,

Vidloha

2024

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One of the main goals of biogas energy use, as mentioned above, is to reduce greenhouse gas emissions when replacing fossil fuels. This implies determination of emissions before and after biogas use. The calculation of emissions is based on a systematic approach, when the calculation is made taking into account emissions from fuel extraction, its transportation, fuel consumption for equipment manufactur-ing, etc. At the same time, the life cycle of equipment and capital facilities is consid-ered. In this regard, the development of performance indicators for the ecological use of biofuels becomes relevant from this point of view. The above-mentioned devel-opments are computer programmes with relevant databases. One of the peculiarities of using these programmes, in our opinion, is that, on the one hand, they allow for a specific calculation with maximum detail and assessment of the "integral" result. At the same time, the analysis of the interaction of various factors remains hidden, which can often lead to erroneous conclusions. This is especially true for generalised (strategic) analysis. Therefore, computational studies should be supplemented by analytical studies that allow identifying the main relationships between parameters.

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“…The type of graphs coincides with the data of other researchers [1][2][3][4][5], which confirms the reliability of the calculation results.…”

Section: Fig 2 Results Of a Computer Calculation Of The Kinetics Of N...supporting

confidence: 90%

“…The highest amount of NO 2 (9.62-10 -5 %) occurs at α=1.1, and then decreases and becomes equal to 2.61-10 -5 % at α=1. 4.…”

Section: Fig 2 Results Of a Computer Calculation Of The Kinetics Of N...mentioning

confidence: 99%

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The influence of biogas content on the emission of harmful impurities and the introduction of greenhouse gas emission methodology

Kuris,

Vidloha

2024

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Unified equation of state of He3–4He liquid mixtures over the whole concentration range at temperatures of 2.25–4.2 K and pressures up to 10 MPa

Sibileva

Karnatsevich

Khazhmuradov

et al. 2004

Low Temperature Physics

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A unified empirical equation of state for He3–4He mixtures is found in analytical form on the basis of the existing experimental P–V–T data for pure He3, He4, and their mixtures in the homogeneous liquid phase in the temperature interval 2.25–4.2 K and pressure interval 0–10 MPa. An algorithm for calculating the fitting coefficients of an approximating expression for P(V,T,c) is constructed. The average absolute error for the determination of P is ±0.015 MPa.

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Helmholtz Free Energy Equation of State for 3He–4He Mixtures at Temperatures Above 2.17 K

Pan

Zhang

Rouille

et al. 2021

Journal of Physical and Chemical Reference Data

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The work presents the first wide-range equation of state (EOS) for 3He–4He mixtures based on the reduced Helmholtz free energy multi-fluid approximation model. It covers the temperature range from 2.17 to 300 K and the pressure from the vapor pressure up to 3 MPa for any given mixture 3He mole fraction. In this model, the 4He and 3He reduced Helmholtz free energy equations and departure functions from the literature are employed and only five unknown mixture parameters are needed for each given departure function. The parameters and the best model for the concerned binary mixture were determined by the Levenberg–Marquardt optimization method. With the best developed model, the liquid, gaseous, and saturated thermophysical properties of the mixture can be mostly described with an accuracy better than 5%. Furthermore, a database for the thermophysical properties of 3He–4He mixtures is generated and provided for interpolation in temperature, pressure, and 3He mole fraction. The current EOS and database can be applied to the design and optimization of ultra-low temperature refrigerators.

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Equation of state of an equimolar He3–He4 mixture

Cited by 3 publications

References 4 publications

The influence of biogas content on the emission of harmful impurities and the introduction of greenhouse gas emission methodology

The influence of biogas content on the emission of harmful impurities and the introduction of greenhouse gas emission methodology

Unified equation of state of He3–4He liquid mixtures over the whole concentration range at temperatures of 2.25–4.2 K and pressures up to 10 MPa

Helmholtz Free Energy Equation of State for 3He–4He Mixtures at Temperatures Above 2.17 K

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