{"title":"A flexible approach for accurate supercritical CO2 cycle performance modeling","authors":"Petros Chatzopoulos, Nikolaos Aretakis, Konstantinos Mathioudakis","doi":"10.1016/j.supflu.2025.106604","DOIUrl":null,"url":null,"abstract":"<div><div>A rapid and efficient method for modeling supercritical CO<sub>2</sub> (scCO<sub>2</sub>) Brayton cycles is presented, enabling calculations for both design and off-design conditions. A library is developed within an object-oriented simulation environment, to perform the calculations, incorporating an existing open-source library for accurately computing the specific properties of CO<sub>2</sub> near its critical point. For turbomachinery, compressors and turbines, predefined performance maps and appropriate similitude models are utilized for cycle simulations. The recuperator performance representation is based on effectiveness and is scaled according to mass flow rate for off-design operation. A particular feature of the approach is the implementation of adaptive modeling, for producing models that accurately represent operating installations, marking the first application of such a technique in supercritical CO<sub>2</sub> cycle modeling in general. The process of model building is demonstrated through application to a recuperated single shaft closed cycle. The accuracy of computations is validated through comparisons to published results.</div></div>","PeriodicalId":17078,"journal":{"name":"Journal of Supercritical Fluids","volume":"222 ","pages":"Article 106604"},"PeriodicalIF":3.4000,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Supercritical Fluids","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0896844625000919","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
A rapid and efficient method for modeling supercritical CO2 (scCO2) Brayton cycles is presented, enabling calculations for both design and off-design conditions. A library is developed within an object-oriented simulation environment, to perform the calculations, incorporating an existing open-source library for accurately computing the specific properties of CO2 near its critical point. For turbomachinery, compressors and turbines, predefined performance maps and appropriate similitude models are utilized for cycle simulations. The recuperator performance representation is based on effectiveness and is scaled according to mass flow rate for off-design operation. A particular feature of the approach is the implementation of adaptive modeling, for producing models that accurately represent operating installations, marking the first application of such a technique in supercritical CO2 cycle modeling in general. The process of model building is demonstrated through application to a recuperated single shaft closed cycle. The accuracy of computations is validated through comparisons to published results.
期刊介绍:
The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics.
Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.