Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
STUDY OF A HYBRID MOLTEN CARBONATE FUEL CELL AND GAS TURBINE CYCLE
Submission Author:
Barbara Emmanuelle Sanches Silva , MG , Brazil
Co-Authors:
Barbara Emmanuelle Sanches Silva, Elisangela Leal
Presenter: Barbara Emmanuelle Sanches Silva
doi://10.26678/ABCM.ENCIT2018.CIT18-0272
Abstract
Continuous increase in energy demand coupled with greater knowledge about the environmental impacts of the most used processes for the energy generation has driven the development of technologies to promote efficiency in these processes. Hybrid systems for thermal machines that include the use of fuel cells have been proposed and studied with promising results. Molten carbonate fuel cells (MCFC) present numerous advantages compatible with the current demands for the energy production in a sustainable and commercially competitive way, regarding to other processes such as thermal plants. However, MCFC susceptibility to the deterioration of its components implies a reduced useful lifetime, being an obstacle to the potential of its economic attractiveness. In recent years, there have been advances in the choice of materials used in the fuel cell constitution to circumvent this problem. In addition, in-depth studies of the operation variables considered to be determinant in their efficiency are intended to compensate investments by increasing the cost-benefit ratio of the fuel cell, given its intrinsic potential. This paper presents an analysis of the main variables on the efficiency and power generation of a hybrid system comprised of a molten carbonate fuel cell and a gas turbine through the determination of fuel cell design points and subsequent hybrid system modeling. Results indicate that increase in temperature and operating pressure of the fuel cell as well as the fuel reform rate improves the performance of the hybrid system as a whole. Variation in the utilization rate, however, did not determine an expressive increase in the efficiency of the system.
Keywords
Hybrid System, Gas Turbine, MCFC, Fuell Cell, Energy Analysis
