Phase behavior and enthalpies of binary mixtures of R-1243zf with PAG 68, POE 85 and PEC4 oils

IF 2.2 3区工程技术 Q3 CHEMISTRY, PHYSICAL

Journal of Chemical Thermodynamics Pub Date : 2024-01-28 DOI:10.1016/j.jct.2024.107263

Yanjun Sun , Shibiao Wang , Haiqi Zheng , Xiaopo Wang

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引用次数: 0

Abstract

The increasing concerns of global warming impact of traditional HFC refrigerants drives the requirement for alternatives more urgent. Due to the excellent properties (zero ODP, extremely-low GWP, nonflammable, nontoxic, etc.), 3,3,3-Trifluoropropene (R-1243zf) is attracting a lot of fashionable attention in the refrigeration and air conditioning (RAC) industry. To better understand the oil existence influence on the performance of an evaporator, the vapor–liquid-phase equilibrium were measured for R-1243zf with PAG 68, PEC4, and POE 85 oils by an isochoric method between (298.15 and 343.15) K. The NRTL model was applied to correlate the phase-equilibrium data. The pressure-enthalpy-vapor quality (p-h-X) diagrams were plotted for R-1243zf and R-1243zf/lubricant blends with different oil-circulation mass fractions (C_g), and the differences in enthalpies were analyzed. There is a critical vapor quality (X_cri) between the isotherm curves. On the left side of X_cri, isotherm curves are almost identical. On the right side of X_cri, these curves separated gradually especially at high vapor quality.

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R-1243zf 与 PAG 68、POE 85 和 PEC4 油的二元混合物的相行为和焓

传统 HFC 制冷剂对全球变暖的影响日益引起人们的关注，因此对替代品的需求更加迫切。由于 3,3,3-三氟丙烯（R-1243zf）具有优异的性能（零 ODP、极低全球升温潜能值、不可燃、无毒等），因此在制冷和空调（RAC）行业备受关注。为了更好地了解油的存在对蒸发器性能的影响，采用等时法测量了 R-1243zf 与 PAG 68、PEC4 和 POE 85 油在开氏 298.15 和 343.15 之间的汽液相平衡。绘制了不同油循环质量分数 (Cg) 的 R-1243zf 和 R-1243zf/ 润滑油混合物的压力-焓-蒸汽质量 (p-h-X) 图，并分析了焓的差异。等温线之间存在临界蒸汽质量 (Xcri)。在 Xcri 的左侧，等温线几乎相同。在 Xcri 的右侧，这些曲线逐渐分离，尤其是在高蒸气质量时。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Chemical Thermodynamics 工程技术-热力学

CiteScore

5.60

自引率

15.40%

发文量

199

审稿时长

79 days

期刊介绍： The Journal of Chemical Thermodynamics exists primarily for dissemination of significant new knowledge in experimental equilibrium thermodynamics and transport properties of chemical systems. The defining attributes of The Journal are the quality and relevance of the papers published. The Journal publishes work relating to gases, liquids, solids, polymers, mixtures, solutions and interfaces. Studies on systems with variability, such as biological or bio-based materials, gas hydrates, among others, will also be considered provided these are well characterized and reproducible where possible. Experimental methods should be described in sufficient detail to allow critical assessment of the accuracy claimed. Authors are encouraged to provide physical or chemical interpretations of the results. Articles can contain modelling sections providing representations of data or molecular insights into the properties or transformations studied. Theoretical papers on chemical thermodynamics using molecular theory or modelling are also considered. The Journal welcomes review articles in the field of chemical thermodynamics but prospective authors should first consult one of the Editors concerning the suitability of the proposed review. Contributions of a routine nature or reporting on uncharacterised materials are not accepted.