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Relevant bibliographies by topics / Equations of state and thermodynamic models Peng-Robinson

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Academic literature on the topic 'Equations of state and thermodynamic models Peng-Robinson'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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Journal articles on the topic "Equations of state and thermodynamic models Peng-Robinson"

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Durakovic and Skaugen. "Analysis of Thermodynamic Models for Simulation and Optimisation of Organic Rankine Cycles." Energies 12, no. 17 (2019): 3307. http://dx.doi.org/10.3390/en12173307.

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Equations of state (EOSs) form the base of every thermodynamic model used in the design of industrial processes, but little work has been done to evaluate these in the context of such models. This work evaluates 13 EOSs for their accuracy, computational time and robustness when used in an in-house optimisation program that finds the maximum power output of an organic Rankine cycle. The EOSs represent popular choices in the industry, such as the simple cubic EOSs, and more complex EOSs such as the ones based on corresponding state principles (CSP). These results were compared with results from

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Trawiński, Paweł. "Development and implementation of mathematical models of working mediums for gas part of combined cycle gas turbine system in Python programming environment." E3S Web of Conferences 137 (2019): 01047. http://dx.doi.org/10.1051/e3sconf/201913701047.

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The working mediums in the gas turbine systems are: atmospheric air, natural gas and exhaust gases. For the detailed analysis of thermodynamic performance and values at characteristic points of the cycle it is necessary to know the relations defining: specific volume, specific isobaric and isochoric heat capacity, isentropic exponent, specific enthalpy and specific entropy. Mathematical models of thermodynamic parameters for the mentioned mediums were developed based on dependencies for mixtures of ideal and semi-ideal gases. The functions obtained for semi-ideal gas mixtures were extended by

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Mehl, Ana, Fabio P. Nascimento, Pedro W. Falcão, Fernando L. P. Pessoa, and Lucio Cardozo-Filho. "Vapor-Liquid Equilibrium of Carbon Dioxide + Ethanol: Experimental Measurements with Acoustic Method and Thermodynamic Modeling." Journal of Thermodynamics 2011 (May 24, 2011): 1–11. http://dx.doi.org/10.1155/2011/251075.

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Phase behavior of systems composed by supercritical carbon dioxide and ethanol is of great interest, especially in the processes involving supercritical extraction in which ethanol is used as a cosolvent. The development of an apparatus, which is able to perform the measurements of vapor-liquid equilibrium (VLE) at high pressure using a combination of the visual and the acoustic methods, was successful and was proven to be suited for determining the isothermal VLE data of this system. The acoustic method, based on the variation of the amplitude of an ultra-sound signal passing through a mixtur

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Ouaer, Hocine, Amir Hossein Hosseini, Menad Nait Amar, et al. "Rigorous Connectionist Models to Predict Carbon Dioxide Solubility in Various Ionic Liquids." Applied Sciences 10, no. 1 (2019): 304. http://dx.doi.org/10.3390/app10010304.

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Estimating the solubility of carbon dioxide in ionic liquids, using reliable models, is of paramount importance from both environmental and economic points of view. In this regard, the current research aims at evaluating the performance of two data-driven techniques, namely multilayer perceptron (MLP) and gene expression programming (GEP), for predicting the solubility of carbon dioxide (CO2) in ionic liquids (ILs) as the function of pressure, temperature, and four thermodynamical parameters of the ionic liquid. To develop the above techniques, 744 experimental data points derived from the lit

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GUARDONE, ALBERTO, CALIN ZAMFIRESCU, and PIERO COLONNA. "Maximum intensity of rarefaction shock waves for dense gases." Journal of Fluid Mechanics 642 (December 23, 2009): 127–46. http://dx.doi.org/10.1017/s0022112009991716.

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Modern thermodynamic models indicate that fluids consisting of complex molecules may display non-classical gasdynamic phenomena such as rarefaction shock waves (RSWs) in the vapour phase. Since the thermodynamic region in which non-classical phenomena are physically admissible is finite in terms of pressure, density and temperature intervals, the intensity of RSWs is expected to exhibit a maximum for any given fluid. The identification of the operating conditions leading to the RSW with maximum intensity is of paramount importance for the experimental verification of the existence of non-class

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Sima, Sergiu, and Catinca Secuianu. "The Effect of Functional Groups on the Phase Behavior of Carbon Dioxide Binaries and Their Role in CCS." Molecules 26, no. 12 (2021): 3733. http://dx.doi.org/10.3390/molecules26123733.

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In recent years we have focused our efforts on investigating various binary mixtures containing carbon dioxide to find the best candidate for CO2 capture and, therefore, for applications in the field of CCS and CCUS technologies. Continuing this project, the present study investigates the phase behavior of three binary systems containing carbon dioxide and different oxygenated compounds. Two thermodynamic models are examined for their ability to predict the phase behavior of these systems. The selected models are the well-known Peng–Robinson (PR) equation of state and the General Equation of S

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OKONG'O, NORA A., and JOSETTE BELLAN. "Direct numerical simulation of a transitional supercritical binary mixing layer: heptane and nitrogen." Journal of Fluid Mechanics 464 (August 10, 2002): 1–34. http://dx.doi.org/10.1017/s0022112002008480.

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Direct numerical simulations (DNS) of a supercritical temporal mixing layer are conducted for the purpose of exploring the characteristics of high-pressure transitional mixing behaviour. The conservation equations are formulated according to fluctuation-dissipation (FD) theory, which is consistent with non-equilibrium thermodynamics and converges to kinetic theory in the low-pressure limit. According to FD theory, complementing the low-pressure typical transport properties (viscosity, diffusivity and thermal conductivity), the thermal diffusion factor is an additional transport property which

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Prieto Jiménez, Natalia, and Germán González Silva. "Comparative Study of Equations of State for the Dew Curves Calculation in High Pressure Natural Gas Mixtures. [Estudio Comparativo de Ecuaciones de Estado para el Cálculo de Curvas de Rocío en Mezclas de Gas Natural a Alta Presión]." Revista Logos Ciencia & Tecnología 11, no. 1 (2018): 152–64. http://dx.doi.org/10.22335/rlct.v11i1.743.

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he success during the operation of natural gas processing plants depends on the correct estimation of thermodynamic properties of the system. This paper calculates the equilibrium curves of real and synthetic natural gas mixtures means of three Equations of State (EOS). These equilibrium curves were constructed and compared with experimental data found in the literature covered. The results showed that, above 4 MPa the Peng-Robinson equation presented a considerable deviation with respect to the experimental data, reaching an absolute error of 4.36%; therefore, the GERG2008 equation is recomme

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Hussain, B., and M. Ahsan. "A Numerical Comparison of Soave Redlich Kwong and Peng-Robinson Equations of State for Predicting Hydrocarbons’ Thermodynamic Properties." Engineering, Technology & Applied Science Research 8, no. 1 (2018): 2422–26. http://dx.doi.org/10.48084/etasr.1644.

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Mixture phase equilibrium and thermodynamic properties have a significant role in industry. Numerical analysis of flash calculation generates an appropriate solution for the problem. In this research, a comparison of Soave Redlich Kwong (SRK) and Peng-Robinson (PR) equations of state predicting the thermodynamic properties of a mixture of hydrocarbon and related compounds in a critical region at phase equilibrium is performed. By applying mathematical modeling of both equations of states, the behavior of binary gases mixtures is monitored. The numerical analysis of isothermal flash calculation

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Palmer, S. C., and S. V. Shelton. "Sensitivity Analysis of Absorption Cycle Fluid Thermodynamic Properties." Journal of Energy Resources Technology 121, no. 2 (1999): 137–41. http://dx.doi.org/10.1115/1.2795069.

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Absorption heat pump technology may be improved by new cycle configurations by new working fluids. In this study, the effect of hypothetical working fluids on performance improvement is explored. The performance of two cycles is studied using three fluid property sources for ammonia/water, i.e., curve-fit experimental data, an ideal solution model, and the Peng-Robinson equation of state model. The models require only minimal fundamental thermodynamic property data for the two pure components. This allows investigation into the influence of each fundamental property on cycle performance, provi

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Dissertations / Theses on the topic "Equations of state and thermodynamic models Peng-Robinson"

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Attia, Ben Amor Afef. "Contribution à la modélisation thermodynamique d'un atelier de purification d'acide acrylique." Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0254/document.

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Ce travail porte sur la contribution à la modélisation thermodynamique d'un atelier de purification d'acide acrylique. Après l'identification des principaux produits intervenant dans l'étape de purification et la collecte de leurs propriétés thermodynamiques disponibles dans la littérature, nous avons effectué une série de mesures expérimentales pour un ensemble de mélanges contenant des acides carboxyliques (en particulier : diagrammes d'équilibres liquide-liquide et équilibres liquide-vapeur, enthalpies d'excès et volumes d'excès). L'ensemble des données (nos mesures et les valeurs de la lit

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Book chapters on the topic "Equations of state and thermodynamic models Peng-Robinson"

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Mohamed Mansour, Eman. "Equation of State." In Inverse Heat Conduction and Heat Exchangers. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.89919.

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An equation of state (EOS) is a thermodynamic expression that relates pressure (P), temperature (T), and volume (V). This equation is used to describe the state of reservoir fluids at given conditions. The cubic equations of state (CEOS) such as Van der Waals, Redlich-Kwong, Soave, and Peng-Robinson are simple models that have been widely used in the oil industry. This chapter expressed literature for EOS that varies from simple expressions to multiple constant and convoluted types of equations. Many attempts have been made to describe the thermodynamic behavior of fluids to predict their physical properties at given conditions. So, several forms of the equation of state have been presented to the oil industry in order to calculate reservoir fluid properties. The heat exchanger is important in wildly fields as in aerospace, petrochemical industry, refrigeration, and other fields. The optimization design of the heat exchanger is a great significance to industry process to reduce production cost, realize energy conservation, and reduce energy consumption.

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Conference papers on the topic "Equations of state and thermodynamic models Peng-Robinson"

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Ayala, Luis F., Eltohami S. Eltohami, and Michael A. Adewumi. "A Unified Two-Fluid Model for Multiphase Flow in Natural Gas Pipelines." In ASME 2002 Engineering Technology Conference on Energy. ASMEDC, 2002. http://dx.doi.org/10.1115/etce2002/prod-29119.

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A unified two-fluid model for multiphase natural gas and condensate flow in pipelines is presented. The hydrodynamic model consists of steady-state one-dimensional mass and continuity balances for each phase and a combined energy equation to give a system of five first-order ordinary differential equations. The hydrodynamic model is coupled with a phase behavior model based on the Peng-Robinson equation of state to handle the vapor-/liquid equilibrium calculations and thermodynamic property predictions. The model handles single and two-phase flow conditions and is able to predict the transitio

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Li, Longjian, Jianbang Zeng, Quan Liao, and Wenzhi Cui. "A New Lattice Boltzmann Model for Phase Transition Process." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10961.

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A new lattice Boltzmann model, which is based on Shan-Chen (SC) model, is proposed to describe liquid-vapor phase transitions. The new model is validated through simulation of the one-component phase transition process. Compared with the simulation results of van der Waals fluid and the Maxwell equal-area construction, the results of new model are closer to the analytical solutions than those of SC model and Zhang model. Since the range of temperature and the maximum density ratio are increased, and the value of maximum spurious current is between those of SC and Zhang models, it is believed t

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Hasselmann, Karsten, Stefan aus der Wiesche, and Eugeny Y. Kenig. "Assessment of Compressible RANS and LES Methods for Organic Vapor Flows Past a NACA4412 Airfoil." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-4843.

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Abstract In this contribution, an assessment of compressible Reynolds Averaged Navier Stokes equations (RANS) and Large Eddy Simulation (LES) is presented using transonic organic vapor flow past a NACA4412 airfoil as a case study. The NACA4412 represents a canonical geometry, which, in case of air, has been well investigated numerically and experimentally. The results of the real gas simulations are compared with those of air simulations. For the real gas, the organic vapor Novec 649® is chosen as a representative fluid. The thermodynamic behavior of Novec 649® is modeled with the Peng-Robinso

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Kumar, Sumit K., Rainer Kurz, and John P. O’Connell. "Equations of State for Gas Compressor Design and Testing." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-012.

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In the design and testing of gas compressors, the correct determination of the thermodynamic properties of the gas. such as enthalpy, entropy and density from pressure, temperature and composition, plays an important role. Due to the wide range of conditions encountered, pressure, specific volume and temperature (p-v-T) equations of state (EOS) and ideal gas heat capacities, along with measured data, are used to determine the isentropic efficiency of a compressor configuration and to model the actual behavior of real gases and compressors. There are many possible model choices. The final selec

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Robertson, Miles C., Peter J. Newton, Tao Chen, and Ricardo F. Martinez-Botas. "Development and Commissioning of a Blowdown Facility for Dense Gas Vapours." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91609.

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Abstract The Organic Rankine Cycle is a candidate technology for low grade heat recovery, from sources as diverse as geothermal, solar and industrial/vehicle waste heat. The organic working fluids used within these systems often display significant real-gas effects, especially in proximity of the thermodynamic critical point. Significant research has therefore been performed on the design of real-gas expansion devices, including both positive displacement and rotordynamic machinery. 3D Computational Fluid Dynamics (CFD) is commonly used for performance prediction and flow field analysis within

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Delplanque, J. P., J. Labs, C. S. Lengsfeld, and T. E. Parker. "Effect of Thermodynamic Conditions on Droplet Size in Diesel Engines: Importance of an Advanced Surface Tension Model." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39057.

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The effort described in this extended abstract aims at elucidating how droplet secondary breakup is affected by surface tension behavior at thermodynamic conditions relevant to diesel engine operation. The droplet surface tension coefficient is calculated using the method of MacLeod and Sugden, which takes into account mixture and high-pressure phase equilibrium effects. To this end, high-pressure binary phase equilibrium is computed for prescribed droplet interface conditions using a Peng-Robinson equation of state. Finally, droplet propensity to secondary breakup is estimated based on recent

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Müller, H., and M. Pfitzner. "Large-eddy simulation of transcritical liquid oxygen/methane jet flames." In Progress in Propulsion Physics – Volume 11. EDP Sciences, 2019. http://dx.doi.org/10.1051/eucass/201911177.

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A numerical method to perform large-eddy simulations (LES) of nonpremixed liquid oxygen/methane (LOx/CH4) combustion at supercritical pressures is presented and the computational results are compared with available experimental data. The injection conditions of the considered test case resemble those in typical liquid-propellant rocket engines (LRE). Thermodynamic nonidealities are modeled using the Peng–Robinson (PR) equation of state (EoS) in conjunction with a novel volume-translation method to correct deficiencies in the transcritical regime. The resulting formulation is more accurate than

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Jie, H. E., B. P. Xu, J. X. Wen, R. Cooper, and J. Barnett. "Predicting the Decompression Characteristics of Carbon Dioxide Using Computational Fluid Dynamics." In 2012 9th International Pipeline Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ipc2012-90649.

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In a previous paper, we reported the development of CFD-DECOM, a Computational Fluid Dynamics (CFD) model based on the Arbitrary Lagrangian Eulerian (ALE) approach and the Homogeneous Equilibrium Method (HEM) for simulating multi-phase flows, to predict the transient flow following the rupture of pipelines conveying rich gas or pure carbon dioxide (CO2). The use of CFD allows the effect of pipe wall heat transfer and friction to be quantified. Here, the former is considered through the implementation of a conjugate heat transfer model while the two-phase pipe wall friction is computed using es

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Huh, Cheol, Seong Gil Kang, Sup Hong, et al. "Onshore and Offshore Transport Process Design for Carbon Dioxide Sequestration in a Marine Geological Structure." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-80077.

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In response to climate change, the Kyoto Protocol, and the need to reduce greenhouse gas emissions, researchers are looking to marine geological storage of CO2 as one of the most promising options. Marine geological storage of CO2 involves the capture of CO2 from major point sources (such as a power plant) and the transport of CO2 to storage sites in marine geological structures such as a deep sea saline aquifer. Since 2005, we have developed relevant technologies for marine geological storage of CO2. Those technologies include possible storage site surveys and basic designs for CO2 transport

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Mobinipouya, Neda. "Deviation of the Calculated of Density of Refrigerant Fluids in Both Super and Sub Critical Regions." In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2011. http://dx.doi.org/10.1115/icnmm2011-58132.

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A numerical procedure has successfully predicted accurate values of thermodynamic properties in seven cubic equations of state (EOS) in predicting thermodynamic properties of nine ozone-safe refrigerants both in super and sub-critical regions. Refrigerants include R22, R32, R123, R124, R125, R134a, R141b, R143, and R152a and equations of state, considered here, are Ihm-Song-Mason (ISM), Peng-Robinson (PR) [2], Redlich-Kwong (RK), Soave-Redlikh-Kwong (SRK), Modified Redlickh-Kwong (MRK), Nasrifar-Moshfeghian (NM), and TCC were shown in this paper. In general, the results are in favor of the pre

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