The Development and Optimization of Innovative Systems, Processes, and Materials for the Production, Conversion, and Storage of Energy, 3rd Edition

A special issue of Inventions (ISSN 2411-5134). This special issue belongs to the section "Inventions and Innovation in Energy and Thermal/Fluidic Science".

Deadline for manuscript submissions: 31 August 2024 | Viewed by 1440

Special Issue Editor

Special Issue Information

Dear Colleagues,

This Special Issue will follow the publications of the first and second editions, which presented 15 interesting papers.

The production, conversion, and storage of energy are currently gaining remarkable significance as a consequence of the increase in environmental and energy security issues. Consequently, a significant proportion of actual research is focused on developing beneficial and efficient systems, processes, and materials for electrochemical and thermochemical devices and integrated systems that are able to produce, convert, and store energy, favoring the use of renewable sources for distributed generation and transport, and, at the same time, reducing fuel consumption and emissions. Therefore, many studies have been carried out on the development and optimization of particular systems such as high- and low-temperature batteries, supercapacitors, and fuel cells able to accumulate and deliver electrical energy as well as electrolyzers and storage materials for hydrogen production and re-use. The main desirable features in these devices are their small size, high specific energy, low environmental impact, and low costs. In addition, with regard to hydrogen, much is being carried out toward the development of processes for its production from renewable sources such as thermochemical cycles powered by solar energy, biomass gasification, etc. In this process of rapid power system evolution, the use of integrated storage systems is particularly necessary for improving the operational grid capacity, reducing the costs (of investment and management), and increasing the reliability and safety of modified systems using new technologies.

In particular, the purpose of this Special Issue is to publish high-quality research papers as well as review articles addressing recent advances in the development and optimization of innovative systems, processes, and materials for the production, conversion, and storage of energy. Potential topics include advanced electrode materials, battery and fuel cell management and characterization, renewable energy and power systems, and integrated storage energy systems and materials.

Dr. Alessandro Dell'Era
Guest Editor

Manuscript Submission Information

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  • energy
  • electrode materials
  • batteries
  • fuel cell
  • renewable energy
  • power systems
  • storage system

Published Papers (1 paper)

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14 pages, 3960 KiB  
Experimental Investigation into the Performance of PEMFCs with Three Different Hydrogen Recirculation Schemes
by Kejing Li, Chen Wang, Jingjing Li, Lei Wang, Zongji Li and Chuanlong Zhang
Inventions 2024, 9(2), 33; - 13 Mar 2024
Viewed by 1157
Hydrogen recirculation systems (HRSs) are vital components of proton exchange membrane fuel cells (PEMFCs), and it is necessary to investigate different HRS schemes to meet the needs of high-power PEMFCs. PEMFCs are developing in the direction of low cost, high power, wide working [...] Read more.
Hydrogen recirculation systems (HRSs) are vital components of proton exchange membrane fuel cells (PEMFCs), and it is necessary to investigate different HRS schemes to meet the needs of high-power PEMFCs. PEMFCs are developing in the direction of low cost, high power, wide working conditions, low noise, compact structure, etc. Currently, it is difficult for hydrogen recirculation pumps (HRPs) to meet the flow requirements of high-power PEMFCs. HRPs inevitably have high parasitic energy consumption, loud noise output, high cost, easy leakage, and high failure rates. Therefore, it is necessary to study different HRS schemes to develop a better solution for high-power PEMFCs. In this study, the functional prototype of a piping and instrumentation diagram (P&ID) based on three HRSs of HRPs was designed, and a functional prototype was built. Working according to the analysis and comparison of PEMFC performance test data, we find that the net power trend of PEMFC systems using three different HRS technology schemes is consistent. The ejector scheme and the combination scheme do not reduce the performance of PEMFCs and have advantages in different power ranges, such as 24 A, 48 A, and other small current points. The PEFMC system net power order is as follows: ejector scheme > HRP scheme > combination scheme. At about 120 A, the net power outputs of the three HRS schemes in the PEMFC system coincide. From around 180 A onwards, the PEMFC system power of the combined HRS scheme gradually dominates. At 320 A, the PEFMC system net power order is as follows: combined HRS scheme > HRP scheme > ejector scheme. Full article
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