RT info:eu-repo/semantics/article
T1 Optimization and performance evaluation of equations of state for supercritical CO2-rich mixtures for application in the NET Power cycle
A1 Velázquez Palencia, Iván
A1 Demeyer, Frederiek
A1 Reyes Serrano, Miriam
K1 NET power cycle
K1 Supercritical carbon dioxide
K1 Equations of state
K1 Interaction parameters
K1 33 Ciencias Tecnológicas
AB In this paper the interaction parameters of six equations of state (EoS) were calibrated from density and phaseequilibrium experimental data of supercritical CO2-rich mixtures. The Peng-Robinson (PR), Soave-Redlich-Kwong (SRK), Lee-Kesler-Pl¨ocker (LKP), Benedict-Webb-Rubin-Starling (BWRS), perturbed chain SAFT (PC-SAFT) and Cubic-Plus-Association (CPA) EoSs were considered. As a novelty, the pressure, temperature andcomposition ranges for calibration were (1 – 49) MPa, (293.18 – 423.15) K, and (72.6 – 99.8) % mol CO2, whichare close to those found in the innovative oxy-combustion NET Power cycle, particularizing the optimization ofthe EoSs for application in this power cycle. The performance of the EoSs, including the GERG-2008 EoS, wasassessed in an isentropic compression process from 7.4 MPa to 30 MPa. The LKP EoS reported the lowest averagedeviation, 2.03 %, in modeling the bubble and dew lines of the supercritical CO2 – H2O mixture. The GERG-2008EoS was the most reliable model capturing the density of the supercritical CO2-rich mixtures, reporting anaverage deviation of 1.34 %. Therefore, the combination GERG-2008 + LKP is recommended for NET Powercycle modeling purposes. Only the CPA and GERG-2008 models captured the liquid-like properties of the CO2-rich mixture during the compression. This resulted in a specific compression work of 33.02 kJ kg 1 for GERG-2008, while the PR, SRK, LKP, and PC-SAFT EoSs reported a value up to 1.54, 1.65, 1.53, and 1.70 times higher
PB Elsevier
SN 0896-8446
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/78214
UL https://uvadoc.uva.es/handle/10324/78214
LA eng
NO The Journal of Supercritical Fluids, 2025, vol. 225, p. 106693
NO Producción Científica
DS UVaDOC
RD 02-oct-2025