{"title":"含氢氟碳化合物(HFC)的两种二元CO2基混合物关键参数的实验研究及CO2 + HFC预测模型的修正","authors":"Gequn Shu , Shanzhu Hu , Hua Tian","doi":"10.1016/j.ijrefrig.2025.03.030","DOIUrl":null,"url":null,"abstract":"<div><div>The critical parameters of carbon dioxide (CO<sub>2</sub>) + fluoroethane (R161) and carbon dioxide (CO<sub>2</sub>) + 1,1-difluoroethane (R152a) binary mixtures, including critical temperature and critical pressure, have been determined by variable volume method. The critical point is determined by observing the disappearance and recurrence of the vapor-liquid phase interface in the middle of the sapphire image. The extended uncertainties of mixture composition, critical temperature, and critical pressure are <0.00023, 0.27 K, 0.03 MPa (<em>k</em> = 2, 0.95 confidence level), respectively. The experimental results are compared with the prediction results of Peng-Robinson equation of state (PR EOS), Helmholtz energy equation of state (HEOS), Modified Extended Chueh and Prausnitz (MECP) method, which prove the accuracy of the results for the two mixtures. The coefficients of the MECP method are modified for CO<sub>2</sub>+HFC mixtures, and the prediction accuracy of the method is improved. The Redlich-Kister (RK) equations are used to correlate the experimental data, and the results are in good agreement with the experimental data. The average absolute relative deviation (<em>AARD</em>) of the critical temperature and critical pressure fitted to the RK equation are 0.223% and 0.450% (CO<sub>2</sub>/R161), 0.231% and 0.255% (CO<sub>2</sub>/R152a), respectively, which are basically consistent with the experimental results.</div></div>","PeriodicalId":14274,"journal":{"name":"International Journal of Refrigeration-revue Internationale Du Froid","volume":"175 ","pages":"Pages 259-272"},"PeriodicalIF":3.5000,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental investigation on critical parameters of two binary CO2-based mixtures containing hydrofluorocarbon (HFC) and modification of the CO2 + HFC prediction model\",\"authors\":\"Gequn Shu , Shanzhu Hu , Hua Tian\",\"doi\":\"10.1016/j.ijrefrig.2025.03.030\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The critical parameters of carbon dioxide (CO<sub>2</sub>) + fluoroethane (R161) and carbon dioxide (CO<sub>2</sub>) + 1,1-difluoroethane (R152a) binary mixtures, including critical temperature and critical pressure, have been determined by variable volume method. The critical point is determined by observing the disappearance and recurrence of the vapor-liquid phase interface in the middle of the sapphire image. The extended uncertainties of mixture composition, critical temperature, and critical pressure are <0.00023, 0.27 K, 0.03 MPa (<em>k</em> = 2, 0.95 confidence level), respectively. The experimental results are compared with the prediction results of Peng-Robinson equation of state (PR EOS), Helmholtz energy equation of state (HEOS), Modified Extended Chueh and Prausnitz (MECP) method, which prove the accuracy of the results for the two mixtures. The coefficients of the MECP method are modified for CO<sub>2</sub>+HFC mixtures, and the prediction accuracy of the method is improved. The Redlich-Kister (RK) equations are used to correlate the experimental data, and the results are in good agreement with the experimental data. The average absolute relative deviation (<em>AARD</em>) of the critical temperature and critical pressure fitted to the RK equation are 0.223% and 0.450% (CO<sub>2</sub>/R161), 0.231% and 0.255% (CO<sub>2</sub>/R152a), respectively, which are basically consistent with the experimental results.</div></div>\",\"PeriodicalId\":14274,\"journal\":{\"name\":\"International Journal of Refrigeration-revue Internationale Du Froid\",\"volume\":\"175 \",\"pages\":\"Pages 259-272\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2025-03-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Refrigeration-revue Internationale Du Froid\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0140700725001227\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Refrigeration-revue Internationale Du Froid","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0140700725001227","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
Experimental investigation on critical parameters of two binary CO2-based mixtures containing hydrofluorocarbon (HFC) and modification of the CO2 + HFC prediction model
The critical parameters of carbon dioxide (CO2) + fluoroethane (R161) and carbon dioxide (CO2) + 1,1-difluoroethane (R152a) binary mixtures, including critical temperature and critical pressure, have been determined by variable volume method. The critical point is determined by observing the disappearance and recurrence of the vapor-liquid phase interface in the middle of the sapphire image. The extended uncertainties of mixture composition, critical temperature, and critical pressure are <0.00023, 0.27 K, 0.03 MPa (k = 2, 0.95 confidence level), respectively. The experimental results are compared with the prediction results of Peng-Robinson equation of state (PR EOS), Helmholtz energy equation of state (HEOS), Modified Extended Chueh and Prausnitz (MECP) method, which prove the accuracy of the results for the two mixtures. The coefficients of the MECP method are modified for CO2+HFC mixtures, and the prediction accuracy of the method is improved. The Redlich-Kister (RK) equations are used to correlate the experimental data, and the results are in good agreement with the experimental data. The average absolute relative deviation (AARD) of the critical temperature and critical pressure fitted to the RK equation are 0.223% and 0.450% (CO2/R161), 0.231% and 0.255% (CO2/R152a), respectively, which are basically consistent with the experimental results.
期刊介绍:
The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling.
As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews.
Papers are published in either English or French with the IIR news section in both languages.