Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Dimensioning of Supercritical CO2 Turbines Through a Pseudo-Polytropic Transformation Model
Submission Author:
Matheus Cruz , MG , Brazil
Co-Authors:
Matheus Cruz, Rafael Augusto Magalhães Ferreira, Matheus Porto
Presenter: Matheus Cruz
doi://10.26678/ABCM.COBEM2021.COB2021-2288
Abstract
This paper presents a novel method to estimate turbines performance operating with supercritical CO2. Current methodologies consider only the inlet and exit rotor angles into the performance estimations, neglecting the geometric characteristics. Also, the current relations are based on the ideal gas model. We used real gas models to assess the supercritical CO2 performance behavior when the geometry of the blades are changed, even though the rotor inlet and exit cross-sections do not change. As a result, we found that the turbine power varies significantly with the blade geometry due to the pressure-drop losses, during the fluid flow. We compared the real gas and ideal gas models for supercritical CO2 in the same turbine, and we found that the ideal gas relations underestimates the turbine power output.
Keywords
Supercritical CO2, turbines, real gas, Head Loss, pseudo-polytropic
