The Development of a Transient Analysis Platform of Near-Critical CO 2 Thermodynamic Systems via an Enthalpy-Based Implicit Continuous Eulerian Approach

Seongmin Son () and Seong Jun Bae
Additional contact information
Seongmin Son: Department of Convergence and Fusion System Engineering, Kyungpook National University, Sangju 37224, Republic of Korea
Seong Jun Bae: Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea

Energies, 2024, vol. 17, issue 5, 1-17

Abstract: This work presents the development and validation of an enthalpy-based implicit continuous Eulerian (ICE) solver, termed the near-critical ICE solver (NICES), for the analysis of near-critical CO 2 thermodynamic systems. Traditional approaches relying on pressure and temperature as main inputs for the analysis have limitations in handling CO 2 near the critical point, which exhibits unique characteristics and frequent phase changes. To overcome these limitations, this study proposes using enthalpy as a more suitable mathematical modeling approach. The NICES methodology employs the homogeneous equilibrium model and the Span and Wagner equations of state for CO 2 . This solver demonstrates improved numerical stability and computational speed compared to explicit calculation methods, as validated by frictionless heated pipe scenarios involving phase transitions near the critical point. The enthalpy-based NICES platform can predict thermohydraulics, including multiphase flows, without requiring specialized two-phase flow models.

Keywords: supercritical CO 2; transcritical CO 2; transient analysis; implicit continuous Eulerian; transient analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/5/1126/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/5/1126/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:17:y:2024:i:5:p:1126-:d:1346836

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().