Papers by Keyword: Electrolyser

Abstract: This paper illustrates the results of analysis of the technical potential for hydrogen production and providing electrical energy by fuel cell for residential consumer, through a system that has the basic components such as photovoltaic panels, wind turbines generator, electrolyser and fuel cell. The study estimates the production of hydrogen and electrical energy of this hybrid system for five different areas of Romania, using the following parameters: daily global solar irradiations on horizontal plane and wind speed. Analysis of hydrogen production by using solar and wind resources and ensuring electrical energy by fuel cell, that resulting from proposed autonomous hybrid system was performed through the performance indicators as follows: electrolyser operating time, energy consumed by the electrolyser and hydrogen production, respectively fuel cell operation time and the electrical energy obtained. The objectives of this study include the development and simulation testing of the best situations (methods) for producing hydrogen and ensuring electrical energy by fuel cells from hybrid renewable resources available in Romania. The results show that the use of such systems for hydrogen production and electricity insurance to residential building is relatively advantageous, the total annual production of hydrogen is estimated to be around 77,87 m³ and the total annual electrical energy delivered by fuel cell is estimated to be around 779 kWh, also the equipment components that will make the best configuration of the hybrid system are dependent on the availability of renewable resources.

Abstract: An interesting application of solar energy for methane production is here analysed in terms of energetic efficiency. The application (called Solargas) is constituted by photovoltaic (PV) panels, an electrolyser and a Sabatier reactor. PV panels pick up the solar energy to supply the electrolyser. The electrolyser produces hydrogen from water; the produced hydrogen is used in a Sabatier reactor to obtain methane. Solargas system is here compared to typical biogas and wood chip production systems in terms of the ratio between the output fuel energy and the input solar energy.

Abstract: In this paper one attempted to discuss the effect of reducing the experimental duration of electrochemical impedance spectroscopy (EIS) measurements by reducing the sampling frequency without affecting the measured parameters. The experimental setup is based on a novel cell consisting of two electrodes or three electrodes cell configuration. The experimental layout allows a precise evaluation of the membrane thickness, at micrometer resolution, during the determination of the electrochemical impedance spectra.