The influence of generator wind temperature on hydrogen leakage
Simulation and Analysis of Hydrogen Leakage and Explosion
Key words: hydrogen fuel cell ship; leakage and diffusion; explosion; numerical simulation 30 31 1 Introduction 32 Hydrogen fuel cell is a kind of power generator that hydrogen energy can
Progress in spontaneous ignition of hydrogen during high
Furthermore, research has documented high-pressure hydrogen leakage resulting in spontaneous combustion, even without identifiable ignition sources [12, 13].Moreover, observations have shown that leaky hydrogen can spontaneously combust at release pressures [14] well below the working pressure range of pipelines in various countries the end of 2022, there has been
The Effects of Ambient Temperature and Atmospheric Humidity
In order to investigate the impact of environmental temperature and atmospheric humidity on the leakage and diffusion of hydrogen fluoride (HF) gas, this study focused on the real scenario of an HF chemical industrial park. Based on the actual dispersion scenario of HF gas, a proportionally scaled-down experimental platform for HF gas leakage was established to
A study of hydrogen leak and explosion in different regions of a
The consequences of hydrogen leaks and explosions are predicted for the sake of the safety in hydrogen refueling stations. In this paper, the effect of wind speed on hydrogen leak and diffusion is analyzed in different regions of a hydrogen refueling station, and the influence of delayed ignition time on hydrogen explosion after an accidental hydrogen leak is
A Numerical Simulation on the Leakage Event of a
A recent study proposes to classify the accidental incidents involving hydrogen leakage and diffusion into two categories: hydrogen leakage conditions and local environment conditions . The potential safety issues of
HYDROGEN LEAKAGE: A POTENTIAL RISK FOR THE HYDROGEN
of hydrogen leakage to climate change, driven by hydrogen''s indirect global warming effect through mechanisms that extend the lifetime of methane and other greenhouse gases (GHG) in the atmosphere (Paulot et al. 2012; Derwent et al. 2020).
Numerical Simulation Study on the Diffusion Characteristics of
Yu et al. simulated the hydrogen leakage process of a hydrogen fuel cell vehicle with a storage pressure of 70 MPa, considering the influence of environmental wind, under different opening
Review of Liquid Hydrogen Leakage: Factors and Safety Measures
The hydrogen concentration distributions at different leakage positions after the leakage occurs are obtained by making transient numerical calculations of the hydrogen leakage diffusion at the
Study of the influence of different ignition times on detonation
A 3D model was constructed using the geometry board of the FLACS software submodule preprocessor CASD. According to the actual planning conditions of the site, the hydrogen refueling station covers an area of 6661.79 m 2 to establish the X-axis from west to east, the Y-axis from south to north, and the Z-axis in the vertical direction. To simulate
Safety analysis of leakage in a nuclear hydrogen production
This paper focuses on hydrogen leakage and diffusion in nuclear hydrogen production systems. The "in:Flux" software [39] is used to calculate the influence of wind speed and leakage parameters (direction, diameter, height, and angle). The effect of various factors on hydrogen diffusion distance is qualitatively analyzed.
Analysis of the evolution characteristics of hydrogen leakage and
Hydrogen is a promising energy carrier, but safety concerns must be addressed to ensure its widespread use. Aiming at the problem of hydrogen leakage and diffusion in a hydrogen workshop (HWS), a hydrogen diffusion model in the actual temperature stratified environment is established. The law of hydrogen diffusion evolution in this environment is
The Simulation and Analysis of Leakage, Diffusion Behavior, and
In this study, the influence of wind conditions is analyzed, specifically no wind and 10 m s −1 wind speed, on hydrogen diffusion characteristics following a 70 MPa hydrogen
Simulation and safety analysis of the leakage of
Hydrogen energy is one of the most important new energies in the 21st century. As a new type of the clean energy, low cost hydrogen-production, safe and high-efficient storage and transport, and
Leakage and Diffusion Analysis and Safety Research of Onboard Hydrogen
In this paper, the effect of wind speed on hydrogen leak and diffusion is analyzed in different regions of a hydrogen refueling station, and the influence of delayed ignition time on hydrogen
The study on the results of hydrogen pipeline leakage accident of
This simulation study looked at the influence of ambient conditions (wind speed, temperature, and humidity) on the hydrogen diffusion, and the effect of this on the consequences of the leak
Numerical Simulation and Risk Assessment of Hydrogen Leakage
When hydrogen leaks from a FC, the hydrogen will form a combustible hydrogen cloud in the room. Due to the wide flammable range of hydrogen and the high calorific value generated when hydrogen is ignited, the explosion is inevitable once ignited, especially in SHRS where the space is restricted to a large extent, it is more likely to accumulate in the space to
High pressure hydrogen leakage diffusion: Research progress
The leakage diffusion behaviour of hydrogen is an important prerequisite for the study of hydrogen chain combustion. Therefore, based on previous studies, this paper reviews the research methods and their influencing factors for the leakage-diffusion transport of high-pressure hydrogen occurring during transport and use, and presents and summarises the influence of
Numerical investigation of the leakage and explosion scenarios in
A pseudo-source model for liquid hydrogen leakage is established. Liquid hydrogen releases show dense gas behavior. The trailer location in Pinghu LHRS may worsen the explosion consequences.
Hydrogen Leakage Simulation and Risk Analysis of
Hydrogen is a renewable energy source with various features, clean, carbon-free, high energy density, which is being recognized internationally as a "future energy." The US, the EU, Japan, South Korea, China, and other
(PDF) Numerical Simulation of Hydrogen Leakage and
In conclusion, the experiment result showed that: In open space, hydrogen leakage rate has a great influence on its diffusion. When the leakage rate doubles, the hydrogen leakage range will expand
Dispersion characteristics of hydrogen leakage: Comparing the
The hydrogen leakage theoretical prediction model can predict random hydrogen leakage accidents faster and is more suitable for industrial sites. explore the effects of leakage flow, ambient temperature, and ambient humidity on hydrogen leakage, and verify the accuracy and application scope of the prediction model. CFD modeling and
Numerical investigation of the leakage and explosion scenarios in
Hydrogen is characterized with advantages of high-energy content, reasonable price, and relatively small environmental effect. Accordingly, it has been regarded as an important secondary source of energy and has become the focus of energy strategic shift in the past few years [1, 2].Among different applications of hydrogen as a source of energy, vehicles have the
Research on fence protection for liquid hydrogen leakage in the
Low-temperature hydrogen is prone to react with the tank body, causing hydrogen molecules to enter the internal voids. Baraldi et al. simulated the LH 2 leakage accident by the detachment of the refueling hose and found that under the influence of natural wind, the leakage process would reach a steady state faster [43]. At the same time, it
Influence of wind turbine power curve and electrolyzer operating
Request PDF | Influence of wind turbine power curve and electrolyzer operating temperature on hydrogen production in wind–hydrogen systems | Current simulation tools used to analyze, design and
A study of hydrogen leak and explosion in different regions of a
In this study, the influence of wind conditions is analyzed, specifically no wind and 10 m s⁻¹ wind speed, on hydrogen diffusion characteristics following a 70 MPa hydrogen‐filling machine
Research on hydrogen leakage and diffusion mechanism in
The effects of different external wind speeds, leakage directions, obstacle structures, and ceiling structures were compared, and the mechanism of leakage and diffusion was analyzed. It can be found that the influence of hydrogen leakage direction on the shape and volume of combustible hydrogen clouds was mainly determined by the structure
Study on hydrogen dynamic leakage and flame propagation at
Addy [1] introduced schlieren technology to study high-pressure jets under different nozzle geometries and pressure ratios, and found that the nozzle outlet profile had a great influence on Mach disc diameter.Mogi and Horiguchi [2] visually measured the relative size of hydrogen jet flame with a nozzle diameter of 0.1–4 mm under a pressure of 40 MPa, and
Influence of Longitudinal Wind on Hydrogen Leakage
In order to achieve a good detection effect of fuel cell vehicles within the longitudinal wind scene, based on the simulated hydrogen concentration–time matrix, the scene clustering method...
6 FAQs about [The influence of generator wind temperature on hydrogen leakage]
How does wind affect liquid hydrogen leakage behavior?
Comparison with the leakage behavior under initial conditions reveals that the liquid hydrogen leakage behavior in the hydrogen storage area is strongly influenced by wind, leakage mass flow rate, and gas phase mass fraction. An increase in wind speed increases the diffusion of the flammable hydrogen cloud in the wind direction.
How does wind affect combustible hydrogen cloud shape and volume?
The results showed that the shape and volume of the combustible hydrogen cloud generated by the leak were influenced by obstacles, hydrogen storage pressure, and wind velocity. The disturbance of external wind and the decrease in hydrogen storage pressure will have a positive impact on the reduction of leaked volume.
How does wind direction affect flammable hydrogen leakage diffusion?
The results show that the ambient wind direction directly determines the direction of liquid hydrogen leakage diffusion. The wind speed significantly affects the diffusion distance. When the wind speed is 6 m/s, the diffusion distance of the flammable hydrogen cloud reaches 40.08 m, which is 2.63 times that under windless conditions.
How does wind speed affect flammable hydrogen clouds?
When the wind speed is 6 m/s, the diffusion distance of the flammable hydrogen cloud reaches 40.08 m, which is 2.63 times that under windless conditions. The liquid hydrogen leakage mass flow rate and the mass fraction of the gas phase have a greater effect on the volume of the flammable hydrogen cloud.
How does wind speed affect the diffusion distance of leaking hydrogen?
The wind speed affects the horizontal and vertical diffusion distance of leaking hydrogen. A BP artificial neural network was established to predict the horizontal and vertical spreading distance of the combustible cloud in the leakage accident, and the BP artificial neural network was optimized using the SAA.
How fast does a hydrogen storage tank leak?
The simulation scenario is a horizontal leakage of a 45 MPa hydrogen storage tank, with a leakage mass flow rate of 4.5589 kg/s, an ambient wind speed of 2 m/s in different wind directions, an ambient temperature of 293 K, and a leakage duration of 30 s.
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