Modelling of mixed thermodynamic model based on new materials

IF 1.1 4区工程技术 Q4 THERMODYNAMICS

Thermal Science Pub Date : 2023-01-01 DOI:10.2298/tsci2302067g

Chengwei Geng

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Abstract

In order to solve the problem of the performance of mixed alkane phase change energy storage materials, this paper proposes the modelling research of mixed thermodynamic model based on new materials. In this paper, the thermodynamic performance of binary mixed alkane system is studied, the influence of phase transition temperature, phase transition enthalpy and its composition on the mixed alkane system is explored, and its solid-liquid phase diagram is drawn. We used different thermodynamic models to predict the phase transition temperature and enthalpy in the melting process of binary mixed alkanes, which were mutually verified with the experimental results. The experimental results show that C9-C10 and C9-C11 systems exhibit eutectic behavior. The eutectic components are 88% (mass fraction, the rest is the same) C9-12% C10 and 90% C9-10% C11. The eutectic temperatures are 218.25 K and 215.15 K, respectively. The C8-C9 system has peritectic phenomenon, C10-C11 system shows complete mutual solubility, and their mini?mum melting points are 200.25 K and 234.35 K, respectively. Conclusion is that the C9-C10 and C9-C11 eutectic systems are suitable for low temperature phase change materials in the temperature range of 210-220 K, providing data reference for their application in low temperature energy storage.

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基于新材料的混合热力学模型建模

为了解决混合烷烃相变储能材料的性能问题，本文提出了基于新材料的混合热力学模型建模研究。本文研究了二元混合烷烃体系的热力学性能，探讨了相变温度、相变焓及其组成对混合烷烃体系的影响，并绘制了其固液相图。采用不同的热力学模型对二元混合烷烃熔炼过程的相变温度和焓进行了预测，并与实验结果进行了相互验证。实验结果表明，C9-C10和C9-C11体系表现出共晶行为。共晶组分为88%(质量分数，其余同)c9 ~ 12% C10和90% c9 ~ 10% C11。共晶温度分别为218.25 K和215.15 K。C8-C9体系存在包晶现象，C10-C11体系表现出完全的相互溶解度，它们的微?母熔点分别为200.25 K和234.35 K。综上所述，C9-C10和C9-C11共晶体系适用于210-220 K范围内的低温相变材料，为其在低温储能领域的应用提供了数据参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.