Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
PARAMETRIC STUDY OF GAS TURBINES OPERATION AT OFF-DESING CONDITIONS
Submission Author:
Rafael Pinho Furtado , SP , Brazil
Co-Authors:
Rafael Pinho Furtado, Antonio Gallego
Presenter: Rafael Pinho Furtado
doi://10.26678/ABCM.ENCIT2018.CIT18-0476
Abstract
Gas turbines operate mostly at off-design conditions. To know how a gas turbine operates at off-design conditions performance curves are required, which are difficult to access. Thus with a commercial software, which has gas turbine operation curves, a parametric study of the gas turbines operating in off-design conditions was made. In the parametric study the influence of some gas turbine operating conditions (ambient temperature, relative humidity, altitude, fuel and gas turbine inlet and outlet pressure drop) on some performance parameters of the gas turbines (power, heat rate, exhaust mass flow rate and exhaust temperature) was studied. Correction polynomials were created that generate correction factors of the performance parameters as a function of the operating conditions and by multiplying the correction factors for the different operating conditions it is possible to predict the performance parameters for the turbines in off-design conditions. The method of predicting the performance parameters using correction factors was compared with simulations in the commercial software and correction curves found in the literature, reaching an error below1,5% in most of the cases .
Keywords
Gas Turbines, Off-Design Point, Correction Polynomials, Performance Prediction
