Computational Analysis, 3D Simulation and Optimization of Superfluid Stirling Cryocooler

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS Journal of Energy Resources Technology-transactions of The Asme Pub Date : 2023-05-15 DOI:10.1115/1.4062527
George-Rafael Domenikos, Emmanouil Rogdakis, I. Koronaki
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引用次数: 2

Abstract

The aim of this work is to analyze a Superfluid Stirling Cryocooler using Superfluid Helium as the working medium. The idea behind this kind of cryocooler is to utilize two conjoined Stirling coolers with a phase difference as to achieve heat transfer between them and thus negate the need for a regenerator. The two cycles exchange heat at an exchanger, referred to as a recuperator, placed where the regenerator would be typically. This apparatus is simulated through an one dimensional model where the full equations of state for the superfluid are being used, opposed to the common simplifications when modelling superfluids. This model provides the expected results for the initial case of 180-deg phase difference between the engines, and then finds the optimal phase difference for the best coefficient of performance. A 3D model is designed in the ANSYS Fluent software, and the Superfluid data are used in the CFD calculation. Running different cases, the optimal phase difference for the 3D case was found and compared to the 1D model. Additionally, the cryocooler was simulated to work in different frequencies for finding its optimal speed and derive the cooling power to frequency plot.
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超流斯特林制冷机的计算分析、三维仿真与优化
本文研究了以超流氦为工作介质的超流斯特林制冷机。这种制冷机背后的想法是利用两个连接的斯特林冷却器与相位差,以实现它们之间的热量传递,从而否定了对再生器的需要。这两个循环在换热器中交换热量,该换热器被称为回热器,通常放置在回热器的位置。该装置通过一维模型进行模拟,其中使用了超流体的完整状态方程,而不是模拟超流体时的常见简化。该模型给出了发动机相位差为180°的初始情况下的预期结果,进而求出了性能系数最佳的最优相位差。在ANSYS Fluent软件中设计了三维模型,并利用超流体数据进行CFD计算。运行不同情况下,找到了3D情况下的最佳相位差,并与1D模型进行了比较。此外,还对制冷机在不同频率下的工作进行了仿真,找出了制冷机的最佳转速,并得出了制冷机的冷却功率与频率关系图。
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
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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