George-Rafael Domenikos, Emmanouil Rogdakis, I. Koronaki
{"title":"Computational Analysis, 3D Simulation and Optimization of Superfluid Stirling Cryocooler","authors":"George-Rafael Domenikos, Emmanouil Rogdakis, I. Koronaki","doi":"10.1115/1.4062527","DOIUrl":null,"url":null,"abstract":"\n 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.","PeriodicalId":15676,"journal":{"name":"Journal of Energy Resources Technology-transactions of The Asme","volume":null,"pages":null},"PeriodicalIF":2.6000,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Energy Resources Technology-transactions of The Asme","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1115/1.4062527","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
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.
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