Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Rotor Performance Optimization Of A Centrifugal Compressor Operating With CO2 In Supercritical Conditions
Submission Author:
Bruno José Almeida Nagy , SP
Co-Authors:
Bruno José Almeida Nagy, Allan Carvalho, Paulo Eduardo Batista de Mello, Leandro Salviano, Fabio Saltara, Jurandir Itizo Yanagihara, Daniel Dezan
Presenter: Bruno José Almeida Nagy
doi://10.26678/ABCM.COBEM2019.COB2019-0633
Abstract
Due to its low capital cost, high efficiency with a simple layout and compact turbomachinery, Supercritical CO2 (S-CO2) power cycles have been arisen as an advantageous technology. The present work deals with a computer code implemented in MATLAB® by using mean line method to predict the rotor performance of a centrifugal compressor at design point. S-CO2 is considered as working fluid and the real-gas Span and Wagner equations of state have been used to calculate the thermodynamic properties of the fluid. Since a lot of parameters can affect the rotor performance, a multi-objective optimization procedure is coupled to the computational code by using Non-dominated Sorting Genetic Algorithm genetic (NSGA-II) for maximization of the rotor isentropic efficiency. The input parameters used in the numerical simulations are: mass flow rate, total pressure and total temperature at the inlet of the centrifugal compressor, rotational speed, target pressure ratio and basic geometric parameters of the compressor. The outputs are blade geometry parameter and isentropic efficiency. The results from optimization procedure are compared to available data in the open literature and the main results are discussed.
Keywords
Centrifugal Compressor, Mean Line Method, Supercritical CO2
