Original scientific paper

https://doi.org/10.17559/TV-20200716182721

Thermodynamic Analysis of CO2 Closed-Cycle Gas Turbine for Marine Applications at Various Pressure Ratios

Vedran Mrzljak* orcid.org/0000-0003-0323-2600 ; Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka
Daniel Štifanić orcid.org/0000-0001-9396-2441 ; Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka
Hrvoje Meštrić ; Catolic University of Croatia, Ilica 242, 10000 Zagreb
Zlatan Car ; Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka

Abstract

A thermodynamic analysis of CO2 closed-cycle gas turbine is presented in this paper. Two processes are investigated - base process and the same process upgraded with a heat regenerator. Maximum specific useful work is 159.94 kJ/kg for both observed processes. Involving of heat regenerator inside base CO2 closed-cycle gas turbine process requires attention due to required temperature differences - high pressure ratios cannot be obtained with a high efficiency heat regenerator. Base CO2 closed-cycle gas turbine process did not reach cycle efficiency higher than 25%, while for the upgraded process the cycle efficiency can reach 40% at high pressure ratio and for high regenerator efficiency. Additionally, multilayer perceptron is trained in order to achieve high quality models for estimating specific useful work and efficiency for both, base and upgraded process. As a result, MLP with three hidden layers achieved high values of R2 score.

Keywords

closed-cycle gas turbine; CO2; machine learning; multilayer perceptron; thermodynamic analysis; various pressure ratios

Hrčak ID:

269482

URI

https://hrcak.srce.hr/269482

Publication date:

15.2.2022.

Visits: 1.469 *