{"title":"New Correlation Model of Thermal Conductivity of Liquid Hydrofluorochloro Derivatives of Olefins, Hydrofluorocarbons, and Hydrochlorofluorocarbons","authors":"S. V. Rykov, I. V. Kudryavtseva, V. A. Rykov","doi":"10.1134/s0018151x23050140","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The correlation dependence of thermal conductivity <span>\\({{\\lambda }_{{\\text{s}}}}\\)</span> of liquid refrigerants on the saturation line is developed as a simple function of temperature <span>\\(T\\)</span>: <span>\\({{\\lambda }_{{\\text{s}}}}{\\text{/}}{{\\lambda }_{0}} = {{(1 + \\tau )}^{2}} + A{{\\tau }^{{ - \\chi }}}\\)</span> (where <span>\\({{\\lambda }_{0}}\\)</span> is the criterion unit, <span>\\(\\tau = 1 - T{\\text{/}}{{T}_{{\\text{c}}}}\\)</span>, and <span>\\({{T}_{{\\text{c}}}}\\)</span> is the critical temperature). This dependence satisfies the requirements of dynamic scale theory (ST), and in particular, the passage to the limit <span>\\({{\\lambda }_{{\\text{s}}}}(T \\to {{T}_{{\\text{c}}}}) \\to + \\infty \\)</span>. The proposed correlation dependence is tested using the example of describing the thermal conductivity of 17 liquid substances in the range of state parameters from the saturation line to the critical pressure <span>\\({{p}_{{\\text{c}}}}\\)</span> and in the temperature range from the triple point temperature <i>T</i><sub>tr</sub> to <span>\\({{T}_{{\\text{c}}}}\\)</span>. The substances reviewed include nine fourth-generation refrigerants of hydrofluorochloro derivatives of olefins, seven hydrochlorofluorocarbons and hydrofluorocarbons, and C<sub>3</sub>H<sub>8</sub>. Using the description of <span>\\({{\\lambda }_{{\\text{s}}}}\\)</span> of C<sub>3</sub>H<sub>8</sub> as an example, it is shown that the proposed correlation dependence not only qualitatively but also quantitatively accurately conveys the behavior of <span>\\({{\\lambda }_{{\\text{s}}}}\\)</span> in the vicinity of the critical point. Based on the statistical analysis, it is shown that the proposed correlation with significantly less uncertainty describes the data on the thermal conductivity of liquid hydrofluorochloro derivatives of olefins both on the saturation line and in the single-phase region. Based on the proposed methodology, the thermal conductivity of the cis-isomer R1225ye(Z) is calculated for the first time in the temperature range <span>\\(134.3\\,\\,{\\text{K}} \\leqslant T \\leqslant 373.15\\,\\,{\\text{K}}\\)</span>.</p>","PeriodicalId":13163,"journal":{"name":"High Temperature","volume":null,"pages":null},"PeriodicalIF":1.0000,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"High Temperature","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1134/s0018151x23050140","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
The correlation dependence of thermal conductivity \({{\lambda }_{{\text{s}}}}\) of liquid refrigerants on the saturation line is developed as a simple function of temperature \(T\): \({{\lambda }_{{\text{s}}}}{\text{/}}{{\lambda }_{0}} = {{(1 + \tau )}^{2}} + A{{\tau }^{{ - \chi }}}\) (where \({{\lambda }_{0}}\) is the criterion unit, \(\tau = 1 - T{\text{/}}{{T}_{{\text{c}}}}\), and \({{T}_{{\text{c}}}}\) is the critical temperature). This dependence satisfies the requirements of dynamic scale theory (ST), and in particular, the passage to the limit \({{\lambda }_{{\text{s}}}}(T \to {{T}_{{\text{c}}}}) \to + \infty \). The proposed correlation dependence is tested using the example of describing the thermal conductivity of 17 liquid substances in the range of state parameters from the saturation line to the critical pressure \({{p}_{{\text{c}}}}\) and in the temperature range from the triple point temperature Ttr to \({{T}_{{\text{c}}}}\). The substances reviewed include nine fourth-generation refrigerants of hydrofluorochloro derivatives of olefins, seven hydrochlorofluorocarbons and hydrofluorocarbons, and C3H8. Using the description of \({{\lambda }_{{\text{s}}}}\) of C3H8 as an example, it is shown that the proposed correlation dependence not only qualitatively but also quantitatively accurately conveys the behavior of \({{\lambda }_{{\text{s}}}}\) in the vicinity of the critical point. Based on the statistical analysis, it is shown that the proposed correlation with significantly less uncertainty describes the data on the thermal conductivity of liquid hydrofluorochloro derivatives of olefins both on the saturation line and in the single-phase region. Based on the proposed methodology, the thermal conductivity of the cis-isomer R1225ye(Z) is calculated for the first time in the temperature range \(134.3\,\,{\text{K}} \leqslant T \leqslant 373.15\,\,{\text{K}}\).
期刊介绍：
High Temperature is an international peer reviewed journal that publishes original papers and reviews written by theoretical and experimental researchers. The journal deals with properties and processes in low-temperature plasma; thermophysical properties of substances including pure materials, mixtures and alloys; the properties in the vicinity of the critical point, equations of state; phase equilibrium; heat and mass transfer phenomena, in particular, by forced and free convections; processes of boiling and condensation, radiation, and complex heat transfer; experimental methods and apparatuses; high-temperature facilities for power engineering applications, etc. The journal reflects the current trends in thermophysical research. It presents the results of present-day experimental and theoretical studies in the processes of complex heat transfer, thermal, gas dynamic processes, and processes of heat and mass transfer, as well as the latest advances in the theoretical description of the properties of high-temperature media.
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