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Innovative and Efficient Technologies in Hydrogen Energy Transport and Storage

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A5: Hydrogen Energy".

Deadline for manuscript submissions: 25 November 2025 | Viewed by 449

Special Issue Editors


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Guest Editor
Department of Energy, Systems, Territory and Construction Engineering, University of Pisa, 56122 Pisa, Italy
Interests: computational simulation; power generation; simulation tools; advanced energy systems; waste heat recovery; seawater desalination; natural gas liquefaction
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Energy, Systems, Territory and Construction Engineering, University of Pisa, 56122 Pisa, Italy
Interests: green hydrogen production; hydrogen energy; hydrogen liquefaction; energy systems; renewable energies; techno-economical optimization; computational simulation; advanced energy systems; seawater desalination

Special Issue Information

Dear Colleagues,

We are excited to announce a new Special Issue of Energies, titled "Innovative and Efficient Technologies in Hydrogen Energy Transport and Storage".

Hydrogen is rapidly gaining increasing interest worldwide as an energy carrier, enabling global decarbonization and the transition toward a clean energy system. The energy produced in regions with abundant variable renewable sources can be converted into hydrogen and, through compression, liquefaction, or conversion into other chemical compounds, allows for its transportation over long distances to the areas where it is needed.

Hydrogen storage and transportation are two pillars of the hydrogen economy. A variety of hydrogen storage and transportation technologies are currently available or under research, each with its own advantages and limitations. The effectiveness of each technology depends on the specific application and context, and it should be evaluated considering several factors such as efficiency, safety, cost, and specific requirements. In particular, increasing process efficiency and minimizing specific energy consumption and costs related to the conversion, transportation, and storage of hydrogen are the main challenges to be addressed for scaling up and promoting the hydrogen economy in the near-future. An efficient hydrogen conversion, such as liquefaction or transformation into other chemicals, for transportation purposes, is also desired to limit the energy needs of the overall transportation problem.

This Special Issue aims to contribute to disseminating the latest research and advancements in the field of hydrogen transport and storage.

Potential topics include but are not limited to advances in hydrogen storage technologies (cryo-compressed, liquid or compressed gas storage, metal hydrides, etc.), hydrogen conversion for long-distance transportation (such as ammonia and methanol), hydrogen transportation, hydrogen liquefaction or conversion processes, and strategies to recover and/or minimize boil-off.

We look forward to considering your submissions.

Dr. Andrea Baccioli
Dr. Angelica Liponi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hydrogen transport
  • hydrogen storage
  • ammonia production
  • boil-off management
  • liquid hydrogen
  • hydrogen liquefaction

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Published Papers (1 paper)

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Research

24 pages, 8491 KiB  
Article
Research on Internal Flow Uniformity of U-Flow Pattern and Z-Flow Pattern SOFC Stacks Based on Numerical Analysis
by Hao Yuan Yin, Kun-Woo Yi, Young-Jin Kim, Hyeon-Jin Kim, Kyong-Sik Yun and Ji-Haeng Yu
Energies 2025, 18(7), 1682; https://doi.org/10.3390/en18071682 - 27 Mar 2025
Viewed by 222
Abstract
This study analyzes flow uniformity in U-flow pattern and Z-flow pattern solid oxide fuel cell (SOFC) stacks, assessing their performance under different stack heights and rates of fuel/air usage. Both configurations achieved satisfactory flow distribution uniformity in the anode region at the 1 [...] Read more.
This study analyzes flow uniformity in U-flow pattern and Z-flow pattern solid oxide fuel cell (SOFC) stacks, assessing their performance under different stack heights and rates of fuel/air usage. Both configurations achieved satisfactory flow distribution uniformity in the anode region at the 1 kWe scale, especially with the Z-flow design demonstrating enhanced stability. However, as stack height increased, particularly at 3 kWe, flow uniformity decreased significantly. In the cathode flow region, uniformity was highly sensitive to changes in air utilization rate, with lower air utilization causing more pronounced reductions in flow uniformity for both stack types. Increasing the height of the stack tends to reduce flow uniformity, whereas higher reactant utilization promotes more uniformity. Moreover, flow uniformity strongly correlates with the pressure drop ratio in the core area, where a higher ratio indicates better uniformity. At 75% fuel utilization, the anode flow region of the U-flow pattern 3 kWe stack exhibited excessively high local fuel utilization in the unit cell with the lowest mass flow rate, implying a risk of fuel depletion due to insufficient supply at that height. Overall, the Z-flow pattern stack showed better performance in the anode flow region, particularly at higher capacities, while the U-flow pattern stack performed slightly better in the cathode flow region under low air utilization conditions. These findings indicate that the Z-flow pattern stack is better suited for high-power applications. Full article
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