Фазова рівновага рідина-пара в бінарних сумішах компонентів повітря
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Дата
2020
Автори
Назва журналу
Номер ISSN
Назва тому
Видавець
Одеська національна академія харчових технологій
Анотація
Дисертаційна робота присвячена вивченню та аналітичному опису фазової рівноваги рідина-пара в бінарних сумішах компонентів повітря. В результаті роботи було запропоновано дві форми рівняння для розрахунку властивостей таких сумішей. Всі дослідженні в роботі суміші були розділені на три групи: основні компоненти повітря, що включають суміші з азотом та киснем; суміші інертних газів; суміші, що включають в якості одного з компонентів діоксид вуглецю або метан. Для цих сумішей виконано аналіз експериментальних даних про параметри фазової рівноваги рідина-пара та проведено їх розрахунок. Описана методика складання та вибір рівняння для розрахунку фазової рівноваги рідина-пара в бінарних сумішах компонентів повітря. Проведено зіставлення отриманих за допомогою рівнянь значень тиску рідини та пари із дослідними даними.
Thesis research is devoted to the study and analytical description of the liquid - vapor phase equilibrium in binary mixtures of air components, the equation to calculate the properties of such mixtures. All air component mixtures were divided into three groups: major air components including nitrogen and oxygen mixtures; mixtures of inert gases; mixtures comprising as a component carbon dioxide or methane. For these mixtures, the methods of obtaining experimental data of the liquid-vapor phase equilibrium parameters were reviewed. On the basis of the available experimental data, forms and complex equation were developed to calculate the liquid-vapor phase equilibrium for 22 binary mixtures of air components over a wide range of parameters. The method of assembly and choice of equation for calculating the liquid-vapor phase equilibrium in binary mixtures of air components is described. Because the pressure dependence of the binary mixture in the phase equilibrium state on temperature and composition is complex, two forms of equations are described that depend on the experimental data with sufficient accuracy, depending on the values of the mixture temperature and the critical temperatures of the components. These equations reflect the pressure of the liquid or vapor as a function of temperature and composition. The first proposed form of equation allows to calculate the phase equilibrium of liquid-vapor in binary mixtures at its temperature both below the critical temperatures of the components, and when it exceeds the critical temperature of one of the components. It is used to calculate the phase equilibrium for 15 mixtures. The second form of equation for calculating the liquid-vapor phase equilibrium in binary mixtures can be used at a mixture temperature below the critical temperature of the components. In the given parameter range, this form improves the accuracy of the analytical description of the test data. During the study, this form of equation was improved by introducing amendments to comply with the law of additivity, which made it more flexible. Using this form of equation, 7 mixtures were calculated. According to the results of the calculations, the mean square deviations of the experimental data from the pressure calculated by the equations are not more 5.%. The largest inaccuracies are observed in mixtures characterized by a sharp increase in pressure on isotherms.
Thesis research is devoted to the study and analytical description of the liquid - vapor phase equilibrium in binary mixtures of air components, the equation to calculate the properties of such mixtures. All air component mixtures were divided into three groups: major air components including nitrogen and oxygen mixtures; mixtures of inert gases; mixtures comprising as a component carbon dioxide or methane. For these mixtures, the methods of obtaining experimental data of the liquid-vapor phase equilibrium parameters were reviewed. On the basis of the available experimental data, forms and complex equation were developed to calculate the liquid-vapor phase equilibrium for 22 binary mixtures of air components over a wide range of parameters. The method of assembly and choice of equation for calculating the liquid-vapor phase equilibrium in binary mixtures of air components is described. Because the pressure dependence of the binary mixture in the phase equilibrium state on temperature and composition is complex, two forms of equations are described that depend on the experimental data with sufficient accuracy, depending on the values of the mixture temperature and the critical temperatures of the components. These equations reflect the pressure of the liquid or vapor as a function of temperature and composition. The first proposed form of equation allows to calculate the phase equilibrium of liquid-vapor in binary mixtures at its temperature both below the critical temperatures of the components, and when it exceeds the critical temperature of one of the components. It is used to calculate the phase equilibrium for 15 mixtures. The second form of equation for calculating the liquid-vapor phase equilibrium in binary mixtures can be used at a mixture temperature below the critical temperature of the components. In the given parameter range, this form improves the accuracy of the analytical description of the test data. During the study, this form of equation was improved by introducing amendments to comply with the law of additivity, which made it more flexible. Using this form of equation, 7 mixtures were calculated. According to the results of the calculations, the mean square deviations of the experimental data from the pressure calculated by the equations are not more 5.%. The largest inaccuracies are observed in mixtures characterized by a sharp increase in pressure on isotherms.
Опис
Галкін, В. М. Фазова рівновага рідина-пара в бінарних сумішах компонентів повітря : дис. … канд. техн. наук : спец. 05.14.06 «Технічна теплофізика та промислова теплоенергетика» : захист 26.03.2020 / Галкін Віталій Миколайович ; наук. кер. О. А. Вассерман ; Одес. нац. акад. харч. технологій, Одес. нац. морськ. ун-т. – Одеса, 2020. – 166 с.
Ключові слова
азот, аргон, бінарні суміші, гелій, діоксид вуглецю, кисень, криптон, ксенон, метан, неон, рівновага, рідина-пара, рівняння для фазової рівноваги, nitrogen, argon, binary mixtures, helium, carbon dioxide, oxygen, krypton, xenon, methane, neon, equilibrium, liquid-vapor, equation