用PCM刀片在液体活塞中达到近等温压缩

IF 6.1 2区工程技术 Q2 ENERGY & FUELS

Applied Thermal Engineering Pub Date : 2025-05-08 DOI:10.1016/j.applthermaleng.2025.126758

Meghana Athadkar, Sylvie Lorente

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引用次数: 0

摘要

随着可再生能源在各种规模上的存储目标的增长，空气压缩过程引起了人们的兴趣，如压缩空气储能。这项工作的目标是开发一种在准恒温下压缩空气的解决方案，这是热力学效率方面的黄金标准。为此，将相变材料（PCM）元件插入液体活塞的圆柱形压缩腔中。一种基于尺度分析的理论方法给出了PCM体积、PCM元件几何形状及其间距的信息。建立了一个三维数值模型来描述压缩过程中的传热。在与文献中可用的结果验证后，该模型被扩展到考虑空气压缩室中PCM插入物的存在。因此，通过求解PCM元素内描述熔化的能量方程来完成这组方程。然后对PCM刀片数量的影响以及这些元件之间的距离进行了研究。结果表明，PCM棒间距对压缩空气平均温度控制的影响。在最好的情况下，温度升高4.5 K。

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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Reaching near-isothermal compression in liquid piston with PCM inserts

Air compression processes see a surge of interest with the growing objective of storing renewable energy at various scales, as in Compressed Air Energy Storage. This objective of this work is to develop a solution to compress air at quasi constant temperature, the gold standard in terms of thermodynamic efficiency. To this sake, phase change material (PCM) elements are inserted into the cylindrical compression chamber of a liquid piston. A theoretical approach based on scale analysis gives information on the PCM volume, the PCM elements geometry and their spacing. A three-dimensional numerical model is developed to describe heat transfer during compression. After validation with results available in the literature, the model is expanded to account for the presence of PCM inserts within the air compression chamber. The set of equations is therefore completed by solving the energy equation within the PCM elements to describe melting. A study of the impact of the number of PCM inserts is then conducted together with the distance between these elements. The results show the impact of the PCM rods spacing on the control of the average compressed air temperature. In the best-case scenario, the temperature increase is 4.5 K.

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.