References
- Kuzior, A., Kovalenko, Y., Tiutiunyk, I., & Hrytsenko, L. (2025). Assessment of the energy security of EU Countries in light of the expansion of renewable energy sources. Energies, 18(8), 2126. https://doi.org/10.3390/en18082126
- Jansons, L., Backurs, A., Zemite, L., Zeltins, N., & Laizans, A. (2025). System design and economic feasibility study of large-scale hydrogen storage in aquifers. Hydrogen, 6(4), 109. https://doi.org/10.3390/hydrogen6040109
- Kim, Y., & Yang, H. (2025). Hydrogen purity: influence of production methods, purification techniques, and analytical approaches. Energies, 18(3), 741. https://doi.org/10.3390/en18030741
- Szabó, G. S., Coteț, F.-A., Ferenci, S., & Szabó, L. (2026). Advances in materials and manufacturing for scalable and decentralized green hydrogen production systems. Journal of Manufacturing and Materials Processing, 10(1), 28. https://doi.org/10.3390/jmmp10010028
- Caparrós Mancera, J. J., Segura Manzano, F., Andújar, J. M., Vivas, F. J., & Calderón, A. J. (2020). An optimized balance of plant for a medium-size PEM electrolyzer: Design, control and physical implementation. Electronics, 9(5), 871. https://doi.org/10.3390/electronics9050871
- Endrődi, B., Trapp, C. A., Szén, I., Bakos, I., Lukovics, M., & Janáky, C. (2025). Challenges and opportunities of the dynamic operation of PEM water electrolyzers. Energies, 18(9), 2154. https://doi.org/10.3390/en18092154
- Gómez, J., & Castro, R. (2024). Green hydrogen energy systems: A review on their contribution to a renewable energy system. Energies, 17(13), 3110. https://doi.org/10.3390/en17133110
- Berning, T. (2025). Design of a proton exchange membrane electrolyzer. Hydrogen, 6(2), 30. https://doi.org/10.3390/hydrogen6020030
- Szogradi, M., & Norrman, S. (2021). Model development and transient analysis of the HCPB BB BOP DEMO configuration using the Apros system code. Energies, 14(21), 7214. https://doi.org/10.3390/en14217214
- Kuo, T. C., Shiang, W.-J., Hanafi, J., & Chen, S. Y. (2018). Co-development of supply chain in the BOP markets. Sustainability, 10(4), 963. https://doi.org/10.3390/su10040963
- Eurowater. (n.a.). Ultrapure water for 50 MW PEM electrolyzer. https://www.eurowater.com/en/references/ultrapure-water-for-50-mw-pem-electrolyzer
- Becker, H., Murawski, J., Shinde, D. V., Stephens, I. E. L., Hinds, G., & Smith, G. (2023). Impact of impurities on water electrolysis: A review. Sustainable Energy & Fuels, 7(7), 1565–1603. https://pubs.rsc.org/en/content/articlelanding/2023/se/d2se01517j
- Backurs, A., Jansons, L., & Laizans, A. (2025). Water electrolysis technologies: Comparison of maturity, operational and cost efficiency. In 24th International Scientific Conference “ Engineering for Rural Development ” : Proceedings, 24, (pp. 275–285). 21–23 May 2025. Jelgava: Latvia University of Life Sciences and Technologies. http://doi.org/10.22616/ERDev.2025.24.TF061
- Abdallah, R. Y., Shaaban, M. F., Osman, A. H., Ali, A., Obaideen, K., & Albasha, L. (2025). Synergizing gas and electric systems using power-to-hydrogen: Integrated solutions for clean and sustainable energy networks. Smart Cities, 8(3), 81. https://doi.org/10.3390/smartcities8030081
- Aziz, M., Wijayanta, A. T., & Nandiyanto, A. B. D. (2020). Ammonia as effective hydrogen storage: A review on production, storage and utilization. Energies, 13(12), 3062. https://doi.org/10.3390/en13123062
- Hydrovolt. (2025). Balance of Plant (BoP) in green hydrogen electrolysis systems. https://hydrovoltenergy.com/2025/05/14/balance-of-plant-bop-in-green-hydrogen-electrolysis-systems/
- Koposovs, A., Jansons, L., Bode, I., Zemite, L., & Dzelzitis, E. (2023). Technical condition assessment framework for steel underground gas distribution pipelines in Latvia. In 2023 IEEE 64th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), Riga, Latvia. http://doi.org/10.1109/RTUCON60080.2023.10412977
- FuelCell Energy. (2024). How does an electrolyzer work? https://www.fuelcellenergy.com/blog/how-does-an-electrolyzer-work#:~:text=Both%20PEM%20and%20Alkaline%20electrolyzers,higher%20heating%20value%20of%20hydrogen)
- Ubale, S., Remenyte-Prescott, R., Grant, D. M., Stuart, A., & Hague, A. (2026). Failure and reliability analysis of PEM electrolyser balance of plant. Renewable Energy, 256, Part B, https://doi.org/10.1016/j.renene.2025.124029
- Roy, M.-A., & Abdul-Nour, G. (2024). Integrating modular design concepts for enhanced efficiency in digital and sustainable manufacturing: A literature review. Applied Sciences, 14(11), 4539. https://doi.org/10.3390/app14114539
- Medina Collana, J. T., Carrasco-Venegas, L., Ancieta-Dextre, C., Rodriguez-Taranco, O., Gabriel-Hurtado, D., Montaño-Pisfil, J., … & Herrera-Espinoza, N. (2025). Analysis of the main hydrogen production technologies. Sustainability, 17(18), 8367. https://doi.org/10.3390/su17188367
- Benmehel, A., Chabab, S., Do Nascimento Rocha, A. L., Chepy, M., & Kousksou, T. (2024). PEM water electrolyzer modeling: Issues and reflections. Energy Conversion and Management: X, 24. https://doi.org/10.1016/j.ecmx.2024.100738
- Huang, S., Yinghua, Z., Xiaoyu, W., Jingwu, S., & Shouwen, Y. (2025). A comprehensive review of passive water and thermal management of air-breathing proton exchange membrane fuel cell. International Journal of Energy Research, 5554089. https://doi.org/10.1155/er/5554089
- Enaptor Handbook. (n.a.) Technical integration. https://handbook.enapter.com/knowledge_base/technical_integration.html
- EWI. (2023). The power of scale. Economies of scale and the hydrogen value chain. https://www.ewi.uni-koeln.de/cms/wp-content/uploads/2023/06/20230602_EWI_The-Power-of-Scale_Economies-of-Scale-and-the-Hydrogen-Value-Chain.pdf
- Pilati, P., Ferrari, F., Alleori, R., Falcetelli, F., Ancona, M. A., Melino, F., … & Ricco, M. (2025). Experimental analysis on a commercial power electronic converter in power-to-hydrogen system based on PEM electrolysis and metal hydrides. Energies, 18(11), 2831. https://doi.org/10.3390/en18112831
- Segura, F., & Andújar, J. M. (2015). Modular PEM fuel cell SCADA & simulator system. Resources, 4(3), 692–712. https://doi.org/10.3390/resources4030692
- Papadias, D. D., Ahluwalia, R. K., Peng, J.-K., Valdez, P., Tbaileh, A., & Brooks, K. (2025). Hydrogen carriers for renewable microgrid system applications. Energies, 18(21), 5775. https://doi.org/10.3390/en18215775
- Briguglio, N., Brunaccini, G., Siracusano, S., Randazzo, N., Dispenza, G., Ferraro, M., … & Antonucci, V. (2013). Design and testing of a compact PEM electrolyzer system. International Journal of Hydrogen Energy, 38(26). https://doi.org/10.1016/j.ijhydene.2013.04.091
- Nnabuife, S. G., Hamzat, A. K., Whidborne, J., Kuang, B., & Jenkins, K. W. (2025). Integration of renewable energy sources in tandem with electrolysis: A technology review for green hydrogen production. International Journal of Hydrogen Energy, 107. https://doi.org/10.1016/j.ijhydene.2024.06.342
- Energyworld.com. (2023). The cost of Green Hydrogen: What needs to happen for it to be competitive. https://energy.economictimes.indiatimes.com/news/renewable/the-cost-of-green-hydrogen-what-needs-to-happen-for-it-to-be-competitive/105017579#:~:text=Uninterrupted%20supply%20of%20water%20and%20green%20power,ranges%20from%20$4.10%20to%20$7%20per%20kg
- Fastech. (2024). What is a Hydrogen Hub and what are they used for? https://www.fastechus.com/blog/hydrogen-hubs
- Stargate Hydrogen. (2025). How pure is pure enough? The most important questions about hydrogen purity. https://stargatehydrogen.com/blog/hydrogen-purity/#:~:text=Hydrogen%20purity%20is%20the%20proportion,cell%20and%20a%20system%20failure.
- Król, A., Gajec, M., Holewa-Rataj, J., Kukulska-Zając, E., & Rataj, M. (2024). Hydrogen purification technologies in the context of its utilization. Energies, 17(15), 3794. https://doi.org/10.3390/en17153794
- International Organization for Standardization. (2025). Hydrogen fuel quality – Product specification (ISO Standard No. 14687:2025). https://www.iso.org/standard/82660.html
- Graeme, T. A., Millar, J., & Love, J. (2023). Integration of waste heat recovered from water electrolysis to desalinate feedwater with membrane distillation. Journal of Water Process Engineering, 56, 104426. https://doi.org/10.1016/j.jwpe.2023.104426
- van der Roest, E., Bol, R., Fens, T., & van Wijk, A. (2023). Utilisation of waste heat from PEM electrolysers: Unlocking local optimisation. International Journal of Hydrogen Energy, 48(72), 27872–27891. https://doi.org/10.1016/j.ijhydene.2023.03.374