Controle e automação de um sistema de geração de energia elétrica renovável: avaliação da célula combustível H2/AR tipo PEMFC.

Abstract

This thesis is part of a global project involving the use of renewable sources to be used to produce hydrogen produced and stored in cylinders and consists of energy as it feeds, when necessary, cells to (Polymer Electrolyte Membrane) for conversion into electric energy in hydrogen. The project also includes the development of an automation and control system based on programmable logic controllers for monitoring and supervision of the entire plant. The characterization of the fuel cell with nominal power of 1 KW is made by using a configurable resistive load, developed in this work based on microcontroller. The results show a maximum output power of 943.1 W (4.25 V, 19.96 A, 41.07 ° C), current density of 288.3 mA / cm2 and operating efficiency of 48.05% when the short circuit unit (SCU) is powered on and only 770.4 W (42.84 V, 18.06 A, 39.61 ° C) current density of 268.7 mA / cm2 and operating efficiency of 47 , 15% when the SCU is turned off. Automotive hardware and software feature excellent graphics performance, ease of operation, safety, robustness and stability.