Hydrogen in natural gas grids: prospects and recommendations about gas flow meters

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 86, P. 343 - 362

Published: Aug. 30, 2024

To inject green hydrogen (H2) into the existing natural gas (NG) infrastructure is one way to decarbonize European energy system. However, asset readiness necessary be successful. Preliminary analysis and experimental results about compatibility of mixtures (H2NG) with actual grids make scientific community confident feasibility. Nevertheless, specific technical questions need more research. A significant topic debate impact H2NG on performance state-of-the-art fiscal measuring devices, which are essential for accurate billing. Identifying addressing any potential degradation in their metrological due critical decision-making. literature lacks data meters' technologies currently installed NG grids, such as a comprehensive overview at different concentrations while fragmented among sources. This paper addresses these gaps by analyzing main characteristics categorizing than 20,000 meters THOTH2 project partners' summarizing traditional pure H2 based review, operators experience manufacturers knowledge. Based insights, recommendations given stakeholders overcoming identified barriers facilitate smooth transition.

Language: Английский

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Geochemical influences of hydrogen storage in depleted gas reservoirs with N2 cushion gas

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 87, P. 782 - 792

Published: Sept. 11, 2024

Language: Английский

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Fracture Toughness Assessment of Pipeline Steels Under Hydrogen Exposure for Blended Gas Applications

Metals, Journal Year: 2025, Volume and Issue: 15(1), P. 29 - 29

Published: Jan. 1, 2025

Hydrogen embrittlement (HE) is a critical concern for pipeline steels, particularly as the energy sector explores feasibility of blending hydrogen with natural gas to reduce carbon emissions. Various mechanical testing methods assess HE, fracture toughness offering quantitative measure defect impacts on structural safety, cracks arising during manufacturing, fabrication, or in-service conditions. This study focuses assessing two steels from an existing network under varying concentrations using double cantilever beam (DCB) tests. A vintage API X52 steel ferritic–pearlitic microstructure and modern X65 polygonal ferrite elongated pearlite colonies were selected represent old new materials. Electrochemical charging was employed simulate exposure, parameters derived permeation The results highlight differing crack growth in steels. These findings are essential ensuring safety integrity pipelines carrying hydrogen–natural blends.

Language: Английский

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A review of influence of hydrogen on fracture toughness and mechanical properties of gas transmission pipeline steels

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 102, P. 181 - 221

Published: Jan. 9, 2025

Language: Английский

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Advancing Sustainable Energy Transition Through Green Hydrogen Valleys

IEEE Access, Journal Year: 2025, Volume and Issue: 13, P. 31442 - 31471

Published: Jan. 1, 2025

Language: Английский

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A novel approach for estimating hydrogen uptake and diffusion coefficient

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 112, P. 347 - 353

Published: March 1, 2025

Language: Английский

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Residual strength hybrid prediction of hydrogen-blended natural gas pipelines based on FEM-FC-BP model

Energy, Journal Year: 2025, Volume and Issue: unknown, P. 135463 - 135463

Published: March 1, 2025

Language: Английский

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Comprehensive Review of Hydrogen-Natural Gas Blending: Global Project Insights with a Focus on Implementation and Impact in Romanian Gas Networks

Heliyon, Journal Year: 2025, Volume and Issue: unknown, P. e43090 - e43090

Published: March 1, 2025

Highlights•Overview of recent projects using hydrogen-natural gas mixtures.•New experimental data on performance Romanian grid pipes and appliances.•Technical comparison methane, hydrogen, natural gas-hydrogen blends.•Review materials' compatibility, sealing, combustion with hydrogen.•Analysis practical implications for hydrogen integration in existing infrastructure.Abstract:As the global shift towards utilization progresses, this review examines technical feasibility environmental impact blending gas, focusing its implementation Romania's residential commercial networks. It provides a comprehensive analysis various topics, including safety, sustainability, operational behavior infrastructure when 23% blend (G222). Also, paper reviews studies material compatibility long-term effects pipeline materials such as polyethylene (PE) steel, well potential embrittlement high-pressure systems. also discusses household appliances blends, highlighting reductions CO2 emissions by 6-7%, improvements nitrogen oxide (NOx) emissions, sustained efficiency above 98%. Furthermore, addresses challenges leak detection safety measures hydrogen-enriched networks regulatory frameworks required large-scale transition to hydrogen. By synthesizing current research field studies, insights into readiness integration, offering recommendations future development optimizing ratios ensuring safe implementation.

Language: Английский

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Water Vapour Condensation Behaviour within Hydrogen-Blended Natural Gas in Laval Nozzles

Case Studies in Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 106064 - 106064

Published: March 1, 2025

Language: Английский

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Optimizing a Hydrogen and Methane Blending System Through Design and Simulation

Fuels, Journal Year: 2025, Volume and Issue: 6(2), P. 28 - 28

Published: April 10, 2025

Hydrogen–methane gas mixtures are increasingly recognized as a viable path toward achieving carbon neutrality, leveraging existing natural infrastructure while reducing greenhouse emissions. This study investigates novel static mixing device designed for blending hydrogen and methane, employing both experimental tests three-dimensional computational fluid dynamics (CFD) simulations. Hydrogen was introduced into methane flow via direct injection, with ranging from 5% to 18% hydrogen. The mixture quality assessed using specialized chromatograph, the results were compared against simulated data evaluate mixer’s performance model’s accuracy. system demonstrated effective blending, maintaining uniform concentrations across outlet minimal variations. Experimental showed strong agreement, an average accuracy error below 2%, validating reliability of CFD model. Smaller nozzles (0.4 mm) achieved greater uniformity, larger (0.6 facilitated higher throughput, indicating trade-offs between precision capacity. proved compatible pipeline infrastructure, offering scalable solution integration networks. These findings underscore potential practical component in advancing economy sustainable energy transitions.

Language: Английский

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