Abstract
The second part of the paper is aimed at the analysis of hydrogen fuel demand for the operation of a PEMFC stack. The methodology of hydrogen utilisation for the production of electrical energy and for purging (purification processes) is presented. Based on the laboratory data derived from the electrical and non-electrical parameters recorded in this part of the paper, the design of the monitoring and control system of stack performance was elaborated and the implementation of the system tested. This solution enables not only the monitoring and control of electrical parameters, temperature, and humidity, but also management of the degree of humidification of PEMFC membranes using a short-circuit unit.
Highlights
The storage of sufficient amounts of hydrogen is one of the most challenging tasks along the path to the introduction and establishment of hydrogen as an alternative fuel
Compressed hydrogen storage in gaseous form in composite vessels is the method most frequently applied to supplying protonexchange membrane fuel cells (PEMFCs) used to drive electrical engines for drones
The difference involves the type of lining layer used to manufacture the carbon fibres in composite tanks for the regulation of pressure in two steps, from high pressure (300‒350 bar) to the range (0.5‒1 bar) required for supplying a PEMFC stack [4-6]
Summary
The storage of sufficient amounts of hydrogen is one of the most challenging tasks along the path to the introduction and establishment of hydrogen as an alternative fuel. Hydrogen can be stored as compressed gas (high-pressure storage) in gas cylinders, in solid materials (metal hydrides), and in chemical form (methanol, ethanol) [1‒3]. The difference involves the type of lining layer (metal or plastic) used to manufacture the carbon fibres in composite tanks for the regulation of pressure in two steps, from high pressure (300‒350 bar) to the range (0.5‒1 bar) required for supplying a PEMFC stack [4-6]. Metal hydrides are another common way of storing hydrogen. The goal of this study was to carry out an analysis of hydrogen fuel demand and fuel utilisation during the operation of a PEMFC stack, as well as to develop assumptions for the elaboration of a system of management and control for energy distribution in the stack
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