Calculation of Thermal Pressure Coefficient of Lithium Fluid by <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi>pVT</mml:mi></mml:mrow></mml:math> Data

Moeini, Vahid

doi:10.5402/2012/724230

Cited by 7 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An accurate empirical potential has 2 Advances in Physical Chemistry been found for dense cesium fluid and it is used to test the applicability of the theory. These theoretical predictions are in good agreement with experimental results [19][20][21][22][23][24][25][26].…”

Section: Introductionsupporting

confidence: 80%

Calculation of Thermal Pressure Coefficient of R11, R13, R14, R22, R23, R32, R41, and R113 Refrigerants by pVT Data

Moeini

Farzad

2013

Advances in Physical Chemistry

Self Cite

View full text Add to dashboard Cite

For thermodynamic performance to be optimized particular attention must be paid to the fluid's thermal pressure coefficients and thermodynamic properties. A new analytical expression based on the statistical mechanics is derived for R11, R13, R14, R22, R23, R32, R41, and R113 refrigerants, using the intermolecular forces theory. In this paper, temperature dependency of the parameters of R11, R13, R14, R22, R23, R32, R41, and R113 refrigerants to calculate thermal pressure coefficients in the form of first order has been developed to second and third orders and their temperature derivatives of new parameters are used to calculate thermal pressure coefficients. These problems have led us to try to establish a function for the accurate calculation of the thermal pressure coefficients of R11, R13, R14, R22, R23, R32, R41, and R113 refrigerants based on statistical-mechanics theory for different refrigerants.

show abstract

Section: Introductionsupporting

confidence: 80%

Calculation of Thermal Pressure Coefficient of R11, R13, R14, R22, R23, R32, R41, and R113 Refrigerants by pVT Data

Moeini

Farzad

2013

Advances in Physical Chemistry

Self Cite

View full text Add to dashboard Cite

show abstract

“…The reduced EoS given by equation (17) expresses the LCS with the thermodynamic similarity parameters n and / b V s when the thermodynamic variables of the gvdWEoS are rescaled with the spinodal parameters. Equation (17) gives the isothermal compressibility of substances as…”

Section: Scaling With the Liquid-vapour Critical-point Parametersmentioning

confidence: 99%

“…r for dense fluids has been reported [16] where Z is the compressibility factor. This isotherm regularity has been employed to determine the thermal pressure coefficient of lithium [17,18], internal pressure of lithium and cesium [19]. The metal-nonmetal transition of liquid lithium is explained [17] by the repulsive term of the linear isotherm regularity equation of state.…”

Section: Introductionmentioning

confidence: 99%

“…This isotherm regularity has been employed to determine the thermal pressure coefficient of lithium [17,18], internal pressure of lithium and cesium [19]. The metal-nonmetal transition of liquid lithium is explained [17] by the repulsive term of the linear isotherm regularity equation of state. The liquid alkali metals are found [20,21] to satisfy this linear isotherm regularity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Criticality points on the phase diagram of substances as scaling parameters in the law of corresponding states: alkali metals

Arumugam¹,

Ramasamy²

2023

Phys. Scr.

View full text Add to dashboard Cite

The law of corresponding states (LCS), based on a generalized van der Waals equation of state (gvdWEoS) has been formulated by rescaling its thermodynamic variables with liquid - vapour critical – point parameters, the spinodal, the thermodynamic limit of superheat (TLS) and the supercritical (SC) point. This gvdWEoS, which satisfactorily describes the properties of alkali metals, differs from the known van der Waals equation of state (vdWEoS) by the modified attractive term. The scaling properties have been derived on the basis of the gvdWEoS. The expressions for the isothermal compressibility, a derivate of Gibbs free energy have been derived. In all these cases of rescaling, the gvdWEoS has the similar functional form and the expression for isothermal compressibility has a similar functional form. Hence, it has been established that the parameters of at any spinodal-point on the phase diagram, including the TLS as a particular case, and the SC point, characteristic point on the quasispinodal, provide the alternate scales of parameterizing the fluid properties other than the liquid-vapour critical point.

show abstract

“…It is closely related to various parameters of liquids, such as the isothermal compressibility, the speed of sound, the isobaric thermal expansion coefficient, the internal pressure, etc. (Moeini 2012).…”

Section: Thermal Pressure Coefficient γmentioning

confidence: 99%

Evaluation of High-Pressure Thermophysical Parameters of the Diacylglycerol (DAG) Oil Using Ultrasonic Waves

Kiełczyński

Szalewski

Balcerzak

et al. 2016

Food Bioprocess Technol

View full text Add to dashboard Cite

Modeling of high-pressure technological processes in the food industry requires knowledge of thermophysical parameters of processed foodstuffs in a broad range of pressures and temperatures. However, the high-pressure thermophysical parameters of foodstuffs are very rarely published in the literature. Therefore, further research is necessary to achieve a deeper insight into the biophysical and thermophysical phenomena under pressure to provide better control of technological processes and optimize the effects of pressure. The essential goal of this work is to evaluate the impact of high pressure and temperature on the thermophysical parameters of liquid foodstuffs on the example of diacylglycerol (DAG) oil (which attracted recently a considerable attention from research and industrial communities due to its remarkable benefits for health), using ultrasonic wave velocity and density measurements. Isotherms of adiabatic and isothermal compressibility, isobaric thermal expansion coefficient, internal pressure, and thermal pressure coefficient versus pressure were evaluated, based on the measurement of the compressional ultrasonic wave velocity and density of DAG oil at high pressures (up to 500 MPa) and at various temperatures. The adiabatic compressibility is affected mostly by the changes of pressure, i.e., it grows about four times when the pressure increases from the atmospheric pressure (0.1 MPa) to 400 MPa at a temperature of 50°C. By contrast, the internal pressure is a pronounced function of the temperature, i.e., it increases six times when the temperature rises from 20 to 50°C at a pressure of a 200 MPa. To perform numerical calculations, it was convenient to introduce a Tammann-Tait type equation of state to approximate the measured density isotherms of the investigated DAG oil. The results obtained in this paper can be applied in modeling and optimization of high-pressure technological processes and processing of foodstuffs. Evaluation of high-pressure isotherms of the considered thermophysical parameters of the DAG oil is an original authors' contribution to the state-ofthe-art.

show abstract

Calculation of Thermal Pressure Coefficient of Lithium Fluid by pVT Data

Cited by 7 publications

References 29 publications

Calculation of Thermal Pressure Coefficient of R11, R13, R14, R22, R23, R32, R41, and R113 Refrigerants by pVT Data

Calculation of Thermal Pressure Coefficient of R11, R13, R14, R22, R23, R32, R41, and R113 Refrigerants by pVT Data

Criticality points on the phase diagram of substances as scaling parameters in the law of corresponding states: alkali metals

Evaluation of High-Pressure Thermophysical Parameters of the Diacylglycerol (DAG) Oil Using Ultrasonic Waves

Contact Info

Product

Resources

About