In the present study, a thermodynamical formulation is developed to determine the melting temperature of alkali halides with increasing pressure. The model is used to estimate the melting temperature of alkali halides at different pressures qualitatively. The formulation is obtained using the Goyal and Gupta thermodynamic equation of state. The model calculations require the computed values of volume compression, bulk modulus and its first pressure derivative at varying pressures. It is noted from model calculations that melting temperature increases with pressure but not in linear manner. The present computed results for pressure dependent melting temperature are compared with the available simulated results. The approach is found to be valid as good agreement is observed between previous and present results. Graphs are plotted to depict the variation of melting temperature with isothermal pressure, thermal pressure and total pressure acting on the solid. The present study helps to understand the impact of pressure on melting temperature of alkali halides qualitatively. The model used can also extrapolate the results upto higher pressures.
{"title":"A simple approach to estimate the melting temperature of alkali halides","authors":"M. Goyal","doi":"10.32908/hthp.v51.1213","DOIUrl":"https://doi.org/10.32908/hthp.v51.1213","url":null,"abstract":"In the present study, a thermodynamical formulation is developed to determine the melting temperature of alkali halides with increasing pressure. The model is used to estimate the melting temperature of alkali halides at different pressures qualitatively. The formulation is obtained using the Goyal and Gupta thermodynamic equation of state. The model calculations require the computed values of volume compression, bulk modulus and its first pressure derivative at varying pressures. It is noted from model calculations that melting temperature increases with pressure but not in linear manner. The present computed results for pressure dependent melting temperature are compared with the available simulated results. The approach is found to be valid as good agreement is observed between previous and present results. Graphs are plotted to depict the variation of melting temperature with isothermal pressure, thermal pressure and total pressure acting on the solid. The present study helps to understand the impact of pressure on melting temperature of alkali halides qualitatively. The model used can also extrapolate the results upto higher pressures.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
For the optimisation of the annealing process of aluminium coils, simulation of the process is often performed. To simulate the process with higher accuracy, reliable input parameters are required, and thermal conductivity (thermal contact conductance) is one of them. In the present study, a method to measure the thermal conductivity and thermal contact conductance of metallic sheets were developed based on the steady-state comparative longitudinal heat flow. The apparatus was built with a compression test machine, and thus it allows to control the pressure to the sample and carry out the measurements at different contact pressure. An equipped heater allows to heat the sample to 573 K. To evaluate the thermal conductance at the interface, a thermal resistance network model was applied. The measurements were carried out with an aluminium alloy (AA3003 sheets). In addition to the thermal contact conductance measurements, the surface roughness of the sheets was also investigated. The semi-empirical equation for the relationship between thermal contact conductance and contact pressure was obtained based on the measurement results.
{"title":"Influence of contact pressure on the thermal contact conductance of layered metallic sheets","authors":"T. Matsushita, I. Belov, A. Johansson, A. Jarfors","doi":"10.32908/hthp.v51.1107","DOIUrl":"https://doi.org/10.32908/hthp.v51.1107","url":null,"abstract":"For the optimisation of the annealing process of aluminium coils, simulation of the process is often performed. To simulate the process with higher accuracy, reliable input parameters are required, and thermal conductivity (thermal contact conductance) is one of them. In the present study, a method to measure the thermal conductivity and thermal contact conductance of metallic sheets were developed based on the steady-state comparative longitudinal heat flow. The apparatus was built with a compression test machine, and thus it allows to control the pressure to the sample and carry out the measurements at different contact pressure. An equipped heater allows to heat the sample to 573 K. To evaluate the thermal conductance at the interface, a thermal resistance network model was applied. The measurements were carried out with an aluminium alloy (AA3003 sheets). In addition to the thermal contact conductance measurements, the surface roughness of the sheets was also investigated. The semi-empirical equation for the relationship between thermal contact conductance and contact pressure was obtained based on the measurement results.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Negar Parvizi, F. Akbari, M. Alavianmehr, D. Mohammad-Aghaie
In the present study, a modified version of the perturbed hard trimer chain equation of state was employed to predict thermophysical properties of fatty acid methyl ester (FAME) and fatty acid ethyl ester (FAEE) systems. The thermophysical properties in question are liquid density, vapor pressure, heat capacity, viscosity and thermal conductivity. The predictive power of the model has been assessed by calculating the aforementioned thermophysical properties and comparing with experimental ones as well as other models. Typically, the overall average absolute relative deviation (AARD in %) of the predicted densities for 1665 data points was found to be 2.57%. Simplicity and good agreement between the experimental data and those calculated from the present model, are the reasons for applicability of proposed model with sufficient accuracy for engineering applications. The capability of this new equation of state in predicting both thermodynamic and transport properties simultaneously with good accuracies is really prominent.
本研究采用一种改进的微扰硬三聚链状态方程来预测脂肪酸甲酯(FAME)和脂肪酸乙酯(FAEE)体系的热物理性质。所讨论的热物理性质是液体密度、蒸汽压、热容、粘度和导热系数。通过计算上述热物性，并与实验值及其他模型进行比较，对模型的预测能力进行了评价。在典型情况下，对1665个数据点的预测密度的总体平均绝对相对偏差(AARD in %)为2.57%。该模型的计算结果与实验数据吻合较好，计算结果简单，具有较高的工程应用精度。这种新的状态方程能够同时准确地预测热力学和输运性质，这是非常突出的。
{"title":"Thermophysical properties of biodiesel fuels from modified perturbed hard trimer chain equation of state","authors":"Negar Parvizi, F. Akbari, M. Alavianmehr, D. Mohammad-Aghaie","doi":"10.32908/hthp.v51.1099","DOIUrl":"https://doi.org/10.32908/hthp.v51.1099","url":null,"abstract":"In the present study, a modified version of the perturbed hard trimer chain equation of state was employed to predict thermophysical properties of fatty acid methyl ester (FAME) and fatty acid ethyl ester (FAEE) systems. The thermophysical properties in question are liquid density, vapor pressure, heat capacity, viscosity and thermal conductivity. The predictive power of the model has been assessed by calculating the aforementioned thermophysical properties and comparing with experimental ones as well as other models. Typically, the overall average absolute relative deviation (AARD in %) of the predicted densities for 1665 data points was found to be 2.57%. Simplicity and good agreement between the experimental data and those calculated from the present model, are the reasons for applicability of proposed model with sufficient accuracy for engineering applications. The capability of this new equation of state in predicting both thermodynamic and transport properties simultaneously with good accuracies is really prominent.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Temperature dependent isobaric molar heat capacity cP was measured in a containerless way for liquid Ti and two AlTi binary liquid alloys. The technique of electromagnetic levitation was used in combination with laser modulation calorimetry. In all cases, linear temperature dependencies were found: At the corresponding liquidus temperatures, cP equals 49.75(±2.0) J∙K-1mol-1, 57.43(±2.9) J∙K-1mol-1, and 42.60(±2.2) J∙K-1mol-1, for Ti, Al20Ti80 and Al50Ti50, respectively. The respective temperature coefficients amount to -1.67∙10-2J∙K-2mol-1, -2.73∙10-2J∙K-2mol-1, and +7.83∙10-2J∙K-2mol-1. For liquid Ti, there is a good agreement with existing literature data. The results are discussed in relation to the Neumann-Kopp rule.
{"title":"Molar heat capacity of liquid Ti, Al20Ti80 and Al50Ti50 measured in electromagnetic levitation","authors":"J. Brillo, J. Wessing, H. Kobatake, H. Fukuyama","doi":"10.32908/hthp.v51.1169","DOIUrl":"https://doi.org/10.32908/hthp.v51.1169","url":null,"abstract":"Temperature dependent isobaric molar heat capacity cP was measured in a containerless way for liquid Ti and two AlTi binary liquid alloys. The technique of electromagnetic levitation was used in combination with laser modulation calorimetry. In all cases, linear temperature dependencies were found: At the corresponding liquidus temperatures, cP equals 49.75(±2.0) J∙K-1mol-1, 57.43(±2.9) J∙K-1mol-1, and 42.60(±2.2) J∙K-1mol-1, for Ti, Al20Ti80 and Al50Ti50, respectively. The respective temperature coefficients amount to -1.67∙10-2J∙K-2mol-1, -2.73∙10-2J∙K-2mol-1, and +7.83∙10-2J∙K-2mol-1. For liquid Ti, there is a good agreement with existing literature data. The results are discussed in relation to the Neumann-Kopp rule.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Albano, A. Nenarokomov, R. Pastore, S. Budnik, A. Delfini, O. Alifanov, M. Marchetti, A. V. Morzhukhina, Dmitry M. Titov, F. Santoni, F. Piergentili, A. Netelev
The successful development of aerospace reusable launch vehicles (RLV) require to realize effective thermal protection systems (TPS) for preserving spacecraft integrity from the severe thermal loads during re-entry phase. To such an aim, due to the need of reducing payload transportation costs, applied research is driven towards lightweight materials with advanced thermo-mechanical properties. Space TPS are often based on sandwich structures, where the core material has the main function of thermal insulation. Ceramic porous materials, as carbon (C) and silicon carbide (SiC) foams, represent ideal candidates for application as structural TPS component, thanks to both low density and significant thermal stability at very high temperatures. The paper presents a joint experimental study of carbon-based ceramic foams proposed as sandwich’s core for TPS design. A full thermal characterization of commercial C- and SiC-foam materials is reported, including measurements of thermo-mechanical combined stress, temperature-induced outgassing behavior and heat transfer properties. These latter, in particular, are studied by means of a robust numerical technique, known as the inverse method, which allows to evaluate materials thermal conductivity and heat capacity over a wide range of temperatures, thus establishing the required material behavior for potential use in spacecraft TPS.
{"title":"Thermo-mechanical characterization of carbon-based ceramic foams for high temperature space application","authors":"M. Albano, A. Nenarokomov, R. Pastore, S. Budnik, A. Delfini, O. Alifanov, M. Marchetti, A. V. Morzhukhina, Dmitry M. Titov, F. Santoni, F. Piergentili, A. Netelev","doi":"10.32908/hthp.v51.1003","DOIUrl":"https://doi.org/10.32908/hthp.v51.1003","url":null,"abstract":"The successful development of aerospace reusable launch vehicles (RLV) require to realize effective thermal protection systems (TPS) for preserving spacecraft integrity from the severe thermal loads during re-entry phase. To such an aim, due to the need of reducing payload transportation costs, applied research is driven towards lightweight materials with advanced thermo-mechanical properties. Space TPS are often based on sandwich structures, where the core material has the main function of thermal insulation. Ceramic porous materials, as carbon (C) and silicon carbide (SiC) foams, represent ideal candidates for application as structural TPS component, thanks to both low density and significant thermal stability at very high temperatures. The paper presents a joint experimental study of carbon-based ceramic foams proposed as sandwich’s core for TPS design. A full thermal characterization of commercial C- and SiC-foam materials is reported, including measurements of thermo-mechanical combined stress, temperature-induced outgassing behavior and heat transfer properties. These latter, in particular, are studied by means of a robust numerical technique, known as the inverse method, which allows to evaluate materials thermal conductivity and heat capacity over a wide range of temperatures, thus establishing the required material behavior for potential use in spacecraft TPS.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Madan Singh, B. Taele, S. Lara, S. Singhal, Kamal Devlal
Surface atoms and dangling bonds on the surface affect the thermodynamic properties. A thermodynamical model, based on cohesive energy is presented to discuss the melting properties of materials at nanoscale. The model is used to realize the effect of size and shape on melting temperature Tmn, melting entropy Smn and enthalpy Hmn of Ni, Sn, Al and Cu metallic nanoparticles. The variation in Tmn, Smn and Hmn are examined for nanowire, film, spherical, regular tetrahedral, hexahedral and octahedral shaped nanoparticles. It is reported that Tmn, Smn and Hmn decrease with decreasing the size of the nanoparticles and smaller the particle size, greater are the size and shape effects and when size is less than 10 nm, it has been predicted that on decreasing size, Tmn, Smn and Hmn reduce appreciably. Also, at the same size, more the shape of nanoparticles departs from that of the sphere, smaller is the Smn and Hmn of nanoparticles and its changes are less for nanowire shape and more for regular tetrahedral shape. Our theoretical results are compared with the available experimental or simulation data. Results predicted by our model are in good agreement with experimental observations.
{"title":"Modeling thermodynamic properties of Ni, Sn, Al and Cu nanosolids","authors":"Madan Singh, B. Taele, S. Lara, S. Singhal, Kamal Devlal","doi":"10.32908/hthp.v51.1263","DOIUrl":"https://doi.org/10.32908/hthp.v51.1263","url":null,"abstract":"Surface atoms and dangling bonds on the surface affect the thermodynamic properties. A thermodynamical model, based on cohesive energy is presented to discuss the melting properties of materials at nanoscale. The model is used to realize the effect of size and shape on melting temperature Tmn, melting entropy Smn and enthalpy Hmn of Ni, Sn, Al and Cu metallic nanoparticles. The variation in Tmn, Smn and Hmn are examined for nanowire, film, spherical, regular tetrahedral, hexahedral and octahedral shaped nanoparticles. It is reported that Tmn, Smn and Hmn decrease with decreasing the size of the nanoparticles and smaller the particle size, greater are the size and shape effects and when size is less than 10 nm, it has been predicted that on decreasing size, Tmn, Smn and Hmn reduce appreciably. Also, at the same size, more the shape of nanoparticles departs from that of the sphere, smaller is the Smn and Hmn of nanoparticles and its changes are less for nanowire shape and more for regular tetrahedral shape. Our theoretical results are compared with the available experimental or simulation data. Results predicted by our model are in good agreement with experimental observations.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69443158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Gour, Suman Yadav, Rahul A. Rathore, Sadhna Singh
In present work we have studied half-Heusler compound NiTiSn in perspective of optical, mechanical and thermophysical properties at high temperature and high pressure using density functional theory. We have calculated various dielectric properties viz absorption coefficients, optical conductivity, optical reflectivity and electron energy loss. We have also found high refractive index n(0) ≈ 5 of NiTiSn indicating highly denser medium for low energy waves. The calculated absorption coefficient and optical conductivity are in agreement with the experimental ones for optical device. The optical investigation of the compound shows high reflectivity in the UV region of the photon energy. The elastic properties are investigated in most stable structure of NiTiSn in order to ensure its mechanical applications. Our estimated values of Poisson ratio (n = 0.2735) and pughratio (B/G = 1.87) confirm the metallic nature of NiTiSn. Various thermophysical properties viz. Debye temperature, isothermal coefficients, heat capacity, entropy and volume have been studied at high temperature and high pressures which will upgrade its thermoelectric properties study. The thermophysical properties ensures the Debye T3 law and Dulong Petit limit of NiTiSn at high temperatures and high pressures.
{"title":"First-principle study of mechanical, optical and thermophysical properties of NiTiSn","authors":"A. Gour, Suman Yadav, Rahul A. Rathore, Sadhna Singh","doi":"10.32908/hthp.v51.1227","DOIUrl":"https://doi.org/10.32908/hthp.v51.1227","url":null,"abstract":"In present work we have studied half-Heusler compound NiTiSn in perspective of optical, mechanical and thermophysical properties at high temperature and high pressure using density functional theory. We have calculated various dielectric properties viz absorption coefficients, optical conductivity, optical reflectivity and electron energy loss. We have also found high refractive index n(0) ≈ 5 of NiTiSn indicating highly denser medium for low energy waves. The calculated absorption coefficient and optical conductivity are in agreement with the experimental ones for optical device. The optical investigation of the compound shows high reflectivity in the UV region of the photon energy. The elastic properties are investigated in most stable structure of NiTiSn in order to ensure its mechanical applications. Our estimated values of Poisson ratio (n = 0.2735) and pughratio (B/G = 1.87) confirm the metallic nature of NiTiSn. Various thermophysical properties viz. Debye temperature, isothermal coefficients, heat capacity, entropy and volume have been studied at high temperature and high pressures which will upgrade its thermoelectric properties study. The thermophysical properties ensures the Debye T3 law and Dulong Petit limit of NiTiSn at high temperatures and high pressures.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A simple unified model is used to study the variation in Debye temperature in monometallic and bimetallic nanoalloys. In the present study, a systematic investigation of variation in Debye temperature is done to analyze the impact of size, shape, composition and dimension in monometallic and bimetallic nanoalloys. It is found that Debye temperature in monometallic and bimetallic nanoalloys decreases with decrease in size of nanoalloy. Moreover, for nanoalloys of same size and composition, the Debye temperature varies with dimension too. Debye temperature of nanofilms is found more than that of nanowires and nanoparticles. Debye temperature is also found to vary with shape of the nanoalloy due to change in surface area to volume ratio with shape. The predicted model results are found in good agreement with the available experimental results which justifies the suitability of the present model.
{"title":"Modeling to determine the size dependence of Debye temperature in monometallic and bimetallic nanoalloys","authors":"M. Goyal, Madan Singh","doi":"10.32908/hthp.v51.1123","DOIUrl":"https://doi.org/10.32908/hthp.v51.1123","url":null,"abstract":"A simple unified model is used to study the variation in Debye temperature in monometallic and bimetallic nanoalloys. In the present study, a systematic investigation of variation in Debye temperature is done to analyze the impact of size, shape, composition and dimension in monometallic and bimetallic nanoalloys. It is found that Debye temperature in monometallic and bimetallic nanoalloys decreases with decrease in size of nanoalloy. Moreover, for nanoalloys of same size and composition, the Debye temperature varies with dimension too. Debye temperature of nanofilms is found more than that of nanowires and nanoparticles. Debye temperature is also found to vary with shape of the nanoalloy due to change in surface area to volume ratio with shape. The predicted model results are found in good agreement with the available experimental results which justifies the suitability of the present model.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A new method for predicting the Liquid- Vapor critical point of binary mixture, is presented, which is based in geometrical distances. Actually, the method is based on the minimization of the distance between the experimental and calculated values of the critical temperatures and critical pressures. The SRK and PR equations of state along with classical mixing rules of van der Waals were used as thermodynamic models to calculate the critical point of a given mixture. The proposed method requires that the mixture parameters a, b, and the covolume ε = b/v of each equation of state be determined at each iteration by solving the resulting cubic equation. For nine binary mixtures containing: hydrocarbon derivatives, carbon dioxide and alcohols are studied. The AARE of the calculated values is about 0.86% for critical temperature and 2.07% for critical pressure. Good agreements are found between the calculated results and experimental data. The technique is a general purpose one and can be applied in connection with other thermodynamic models.
{"title":"Method for prediction of liquid-vapor critical points in binary mixtures: geometrical-EOS model","authors":"H. Grine, H. Madani","doi":"10.32908/hthp.v51.1125","DOIUrl":"https://doi.org/10.32908/hthp.v51.1125","url":null,"abstract":"A new method for predicting the Liquid- Vapor critical point of binary mixture, is presented, which is based in geometrical distances. Actually, the method is based on the minimization of the distance between the experimental and calculated values of the critical temperatures and critical pressures. The SRK and PR equations of state along with classical mixing rules of van der Waals were used as thermodynamic models to calculate the critical point of a given mixture. The proposed method requires that the mixture parameters a, b, and the covolume ε = b/v of each equation of state be determined at each iteration by solving the resulting cubic equation. For nine binary mixtures containing: hydrocarbon derivatives, carbon dioxide and alcohols are studied. The AARE of the calculated values is about 0.86% for critical temperature and 2.07% for critical pressure. Good agreements are found between the calculated results and experimental data. The technique is a general purpose one and can be applied in connection with other thermodynamic models.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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