[R1234ze(Z)+R1233zd(E)]和[R1234ze(Z)+异丁烷]两种新出现的混合工作流体中的实验声速

IF 2.2 3区 工程技术 Q3 CHEMISTRY, PHYSICAL
Xiayao Peng, Ying Tan, Zhen Yang, Yuanyuan Duan
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引用次数: 0

摘要

对环保型工作流体,特别是氢氟烯烃(HFO)和碳氢化合物(HC)的热力学特性的精确数据的需求持续不断。对于有机朗肯循环和热泵中的两种新出现的二元混合流体[R1234ze(Z)(或命名为-1,3,3,3-四氟丙烯)+R1233zd(E)(或命名为-1-氯-3,3,3-三氟-1-丙烯)]和[R1234ze(Z)+异丁烷],在压力介于 40 至 960kPa 和温度介于 300 至 370 K 之间时,通过实验获得了声速。固定路径声共振法的实验仪器经过重新校准和维修,确认了实验精度,声速的相对综合扩展不确定度( 2) 小于 0.038 %。由于气相色谱法的信号峰重叠,摩尔分数改用热力学规则根据实验数据计算,R1234ze(Z) + R1233zd(E) 和 R1234ze(Z) + 异丁烷的绝对综合扩展不确定度 ( 2) 分别为 0.0027 和 0.0008。声学病毒系数是根据截断声学病毒方程,利用本研究和以前研究的实验数据推导出来的。将获得的数据与它们本身进行了比较,以确认其基本可靠性。实验数据还与最先进的热力学模型计算出的参考值进行了比较,发现最大偏差可达实验不确定性的 20 倍,从而为新的专用混合模型提出了需求和参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental speed of sound in two emerging mixture working fluids of [R1234ze(Z) + R1233zd(E)] and [R1234ze(Z) + isobutane]

There is a continuous demand for accurate data on the thermodynamic properties of environmentally friendly working fluids, specifically hydrofluoroalkenes (HFO) and hydrocarbons (HC). For two emerging binary mixture fluids in organic Rankine cycle and heat pump, [R1234ze(Z) (or named cis-1,3,3,3-tetrafluoropropene) + R1233zd(E) (or named trans-1-chloro-3,3,3-trifluoro-1-propene)] and [R1234ze(Z) + isobutane], the speed of sound was experimentally obtained at pressure between 40 and 960 kPa and temperature interval of 300 to 370  K. The experimental instruments of the fixed-path acoustic resonance method have been re-calibrated and repaired to confirm the experimental precision, and the relative combined expanded uncertainty (k = 2) of the speed of sound is less than 0.038 %. Due to the signal peak overlapping in gas chromatography, the molar fractions are instead calculated by the experimental data using the thermodynamic rules, with the absolute combined expanded uncertainty (k = 2) of 0.0027 and 0.0008 for R1234ze(Z) + R1233zd(E) and R1234ze(Z) + isobutane, respectively. Acoustic virial coefficients were derived according to the truncated acoustic virial equation using the experimental data of this and previous work. The obtained data were compared with themselves to confirm the basic reliability. The experimental data were also compared with the reference values calculated by the state of art of thermodynamic models and a maximum deviation was found up to 20 times the experimental uncertainty, proposing needs and references for new dedicated mixing models.

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来源期刊
Journal of Chemical Thermodynamics
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.
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