Banca de QUALIFICAÇÃO: MATHEUS LEAL SILVA

CONTROL PROPOSAL SIMPLIFIED FOR SYSTEMS SMALLELECTROLYSIS USING RENEWABLE SOURCES OF ELECTRICAL ENERGY IN THE CONTEXT OF VEHICLE HYBRIDIZATION

Hydrogen Economy, Hydroxy Gas, Controlling, Hybridization

Hydrogen’s economy has been getting importance in the last years as part of global economy electrification of energy vectors solutions proposed and industry decarbonizing (energy transition). Then, instead of producing Hydrogen from polluting sources (Gray Hydrogen),as industry uses to do nowadays, it’s noticing a tendency in search of methods for capture greenhouse gases from the steam reforming (blue hydrogen) and also through electrolysis using sustainable sources of energy, mainly photovoltaic cells and wind generators - the green hydrogen. Still in this context of economy using Hydrogen as a energetic vector, many applications can be implanted both in stationary loads (as heat producing, for example) and mobility uses, when hydrogen is used to move vehicles. According to the last one, there are two main types of vehicle that use hydrogen: using H2 applied in fuel cells to produce electricity so feed an electric motor (electromobility); and the vehicle that uses just H2 as fuel itself in an internal combustion motor to move the car. Although these kinds of motors are already available commercially, they’re not mature enough technologies to achieve the required scalability in market. So an intermediate and lower cost solution is proposed: the utilization of Hydrogen, more specifically, the gaseous combination between Hydrogen (H2) and Oxygen (O2), as known as Hydroxy Gas or HHO Gas, together with conventional fuels as gasoline and diesel in internal combustion engines: the vehicle hybridization in order to reduce greenhouse gases emissions and the costs of fueling. This present work paper talks about a simplified control system for green electrolysis for HHO producing that can contributes to future studies and prototype conceptions related vehicular hybridization. This control system is based on ESP32 microcontroller, making proportional and integrative actions, reading the controlled variable (HHO flow rate) and adjusts the input current of eletectrolyzer (handled variable) in function of predetermined setpoints of flow rates. For this implementation, the transfer functions related to rates of currents inputs were modeled using the black box method, and is expected an automatic adjustment of current from setpoint given by the driver (operator)