Advances in hydrogen blending and injection in natural gas networks: A review

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 105, С. 367 - 381

Опубликована: Янв. 24, 2025

Язык: Английский

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Adoption of advanced coal gasification: A panacea to carbon footprint reduction and hydrogen economy transition in South Africa

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 77, С. 301 - 323

Опубликована: Июнь 17, 2024

Язык: Английский

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Economic analysis of blending hydrogen into natural gas pipelines: Supply chain and station modification

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 118, С. 300 - 311

Опубликована: Март 19, 2025

Язык: Английский

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Numerical analysis of blade height ratio effects on mixing efficiency and energy consumption in triple-blade concentric double-helix static mixers

Physics of Fluids, Год журнала: 2025, Номер 37(2)

Опубликована: Фев. 1, 2025

This work aims to find the optimum value of blade height ratio (R) for improving mixing performance and energy consumption a Triple-Blade Concentric Double-Helix Static Mixer. In this study, two fluids at different concentrations subjected laminar flow conditions is numerically analyzed by using finite element-based Computational Fluid Dynamics simulations. Different values R parameter are considered in wide range Reynolds numbers (Re = 200–1000). analysis then carried out an in-depth study R's effect on performance, strength segregation, index, helicity, velocity profile, pressure drop, pumping power, efficiency. The findings showed that 2/3 gave highest index (MI), with maximum 0.99 Re number 600, which best channel. Helicity visualization also complex helicity patterns increased vortex interactions configuration. geometry improvement MI about 17.85% over Single-Helix Mixer (TB-CSH-SM) 0 600. It important mention increasing leads increase drop and, consequently, consumption. Although gives relatively higher than 0, has lowest power input but lower MI. investigation concludes represents balanced solution since it realizes moderate hence suitable applications requiring efficient compromise between quality

Язык: Английский

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Numerical Simulation of Hydrogen Mixing Process in T-Junction Natural Gas Pipeline

Materials, Год журнала: 2025, Номер 18(8), С. 1879 - 1879

Опубликована: Апрель 20, 2025

As a cost-effective transitional strategy, the integrated utilization and transportation of hydrogen natural gas have gained significant attention as viable pathway toward carbon neutrality. However, hydrogen's low density, viscosity, calorific value cause upward migration accumulation in pipelines, raising embrittlement risks. Its high diffusion leakage rates also pose safety challenges. To address hydrogen-natural blending challenges, achieving uniform mixing is crucial. This study systematically examines hydrogen-methane T-junction pipelines via numerical simulations, analyzing ratios (HMR: 10-25%) methane flow (4-10 m/s) to assess dynamics. The coefficient variation (COV) quantifies uniformity with spatial temporal analyses, optimizing injection for rapid, homogeneous mixing. key findings are follows: (1) length (the minimum axial distance required first pipeline cross-section achieve 95% uniformity) decreases inversely HMR, from 100 D 20.875 (D represents diameter) HMR rises 10% 25%. (2) Analysis initial time (defined duration shows reduction increasing HMR. While rate has less pronounced effect, it nevertheless contributes reducing outlet attain at outlet). (3) A fundamental trade-off engineering applications established: reduces but extends overall (difference between times), while higher shorten cost increased length. primary objective this research elucidate fluid dynamics mixtures providing scientific insights safe efficient operation hydrogen-blended systems.

Язык: Английский

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A novel static mixer for blending hydrogen into natural gas pipelines

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 86, С. 1118 - 1128

Опубликована: Сен. 4, 2024

Язык: Английский

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Coupling effect between mixing uniformity and heat transfer of particles in a double barrel with differential velocity based on CFD-DEM

Computational Particle Mechanics, Год журнала: 2025, Номер unknown

Опубликована: Апрель 23, 2025

Язык: Английский

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Transport Mechanism and Optimization Design of LBM–LES Coupling-Based Two-Phase Flow in Static Mixers

Processes, Год журнала: 2025, Номер 13(6), С. 1666 - 1666

Опубликована: Май 26, 2025

Static mixers have been widely used in marine research fields, such as control systems, ballast water treatment and seawater desalination, due to their high efficiency, low energy consumption, broad applicability. However, the turbulent mixing process fluid–wall interactions involving complex structures make transport characteristics of static nonlinear, which affect efficiency stability fluid device. Here, modeling design optimization two-phase flow dynamics a mixer face many challenges. This paper proposes problem-solving method for mixers, based on lattice Boltzmann (LBM) large eddy simulation (LES). The strategies component are analyzed. First, model is set up, LBM multiple-relaxation-time wall-adapting local (MRT-WALE) vortex viscosity coupling model. Using octree block refinement technology, interaction mechanism between wall during explored. Then, field analyzed under different rates element configurations improve stability. results indicate that proposed methods can reveal dynamic evolution mixed-flow fields. Blade components main driving force behind increased kinetic induced formation, enhancing macroscopic effect. Moreover, variations velocity blade angles important factors affecting system pressure drop. If inlet 3 m/s angle 90°, exhibits optimized overall performance. quantitative analysis shows increasing from 80° 100° reduces drop by approximately 44%, while raising 15 lowers outlet COV value about 70%, indicating enhanced uniformity. These findings confirm an combined with 90° provides optimal trade-off performance efficiency.

Язык: Английский

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Design and mixing performance analysis of a new static mixer for hydrogen-doped natural gas

Journal of Mechanical Science and Technology, Год журнала: 2025, Номер unknown

Опубликована: Май 30, 2025

Язык: Английский

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Discovery of a foreign-gas barrier effect for mitigating hydrogen corrosion and its enhancement approach: A multiscale modeling study

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 140, С. 286 - 297

Опубликована: Май 30, 2025

Язык: Английский

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