Experimental Characterization of an Alkaline Electrolyser and a Compression System for Hydrogen Production and Storage

Abstract

Storing renewable energy in chemicals, like hydrogen, can bring various benefits like high energy density, seasonal storability, possible cost reduction of the final product, and the potential to let renewable power penetrate other markets and to overcome their intermittent availability. In the last year’s production of this gas from renewable energy sources via electrolysis has grown its reputation as one feasible solution to satisfy future zero-emission energy demand. To extend the exploitation of Renewable Energy Source (RES), small-scale conversion plants seem to be an interesting option. In view of a possible widespread adoption of these types of plants, the authors intend to present the experimental characterization of a small-scale hydrogen production and storage plant. The considered experimental plant is based on an alkaline electrolyser and an air-driven hydrogen compression and storage system. The results show that the hydrogen production-specific consumption is, on average, 77 kWh/kgH2. The hydrogen compressor energy requirement is, on average, 15 kWh/kgH2 (data referred to the driving compressed air). The value is higher than data found in literature (4.4–9.3 kWh/kgH2), but the difference can be attributed to the small size of the considered compressor and the choice to limit the compression stages.

Hydrogen Production by Water Electrolysis with Low Power and High Efficiency Based on Pre-Magnetic Polarization

“…Meanwhile, the alternating action of a magnetic force on the water system can cause a macro-ordered vibration of water particles. The energy-level fracture of hydrogen protons occurs in the polarization field, forming two energy states with different proton numbers [21]. In this way, the hydrogen protons can maintain higher activity, which is conducive to the realization of efficient and rapid hydrogen production by electrolysis.…”

A Method of Assessing the Selection of Carport Power for an Electric Vehicle Using the Metalog Probability Distribution Family

“…This means that these items may directly or indirectly collect, process and/or exchange data via a computer network and the Internet. Concurrently, other growing trends on a global scale are the advances in electromobility [2][3][4][5][6][7][8][9], obtaining energy from renewable sources and alternative fuels [10][11][12][13][14][15][16] and reducing exhaust emissions from means of transport [17][18][19][20][21][22][23][24]. The analysis of the literature and the state of knowledge confirmed that there are many technologies on the market for obtaining data from photovoltaic systems, electric car chargers and electricity meters taken from the power grid [2,25,26].…”

Selection of the photovoltaic system power for the electric vehicle

“…The second concerns the replacement of the traditional drive of vehicles using internal combustion engines for vehicles powered by electric motors [9,37] and hybrid drives [10,32]. The third trend concerns the production of hydrogen [31] and its use to power vehicles with hydrogen fuel cells [12]. Hydrogen can also be produced using RES [27].…”