United Kingdom

To advance hydrogen into the energy market it is necessary to consider risk assessment for scenarios that are complicated by accidental hydrogen release mixing with other combustible hydrocarbon fuels. The paper is aimed at examining the effect of mixing the hydrocarbon and inert gas into the hydrogen flame on the kinetic mechanisms the laminar burning velocity and the flame stability. The influences of hydrogen concentration on the flame burni Read More

Numerical simulations have been carried out for pressurised hydrogen release through a nozzle in a simulated vehicle refilling environment of an experiment carried out in a joint industry project by Shell bp Exxon and the UK HSE Shirvill[1]. The computational domain mimics the experimental set up for a vertical downwards release in a vehicle refuelling environment. Due to lack of detailed data on pressure decay in the storage cylinder following the releas Read More

The issue of spontaneous ignition of highly pressurized hydrogen release is of important safety concern e.g. in the assessment of risk and design of safety measures. This paper reports on recent numerical investigation of this phenomenon through releases via a length of tube. This mimics a potential accidental scenario involving release through instrument line. The implicit large eddy simulation (ILES) approach was used with the 5th-order weighted essen Read More

This report provides the Committee on Climate Change’s response to the UK Government’s Clean Growth Strategy.The report finds that:The Government has made a strong commitment to achieving the UK’s climate change targets.Policies and proposals set out in the Clean Growth Strategy will need to be firmed up.Gaps to meeting the fourth and fifth carbon budgets remain. These gaps must be closed.Risks of under-delivery must be addressed and carbon Read More

This report for the CCC by Madano and Element Energy assesses the public acceptability of two alternative low-carbon technologies for heating the home: hydrogen heating and heat pumps.These technologies could potentially replace natural gas in many UK households as part of the government’s efforts to decrease carbon emissions in the UK.The report’s key findings are:carbon emissions reduction is viewed as an important issue but there is limited Read More

This is the Committee’s seventh report on Scotland’s progress towards meetings emissions targets as requested by Scottish Ministers under the Climate Change (Scotland) Act 2009.Overall Scotland continues to outperform the rest of the UK in reducing its greenhouse gas emissions but successful strategies for energy and waste mask a lack of progress in other parts of the Scottish economy.The report shows that Scotland’s total emissions fell by 10% i Read More

Simulation of hydrogen-air mixture explosions in a closed large-scale vessel with uniform and nonuniform mixture compositions was performed by the group of partners within the EC funded project “Hydrogen Safety as an Energy Carrier” (HySafe). Several experiments were conducted previously by Whitehouse et al. in a 10.7 m3 vertically oriented (5.7-m high) cylindrical facility with different hydrogen-air mixture compositions. Two particular experiments we Read More

This paper is concerned with predicting the impact on the probability of failure of adding hydrogen to the natural gas distribution network. Hydrogen has been demonstrated to change the behaviour of crack like defects which may affect the safety of pipeline or make it more expensive to operate. A tool has been developed based on a stochastic approach to assess the failure probability of the gas pipeline due to the existence of crack-lie defects includ Read More

This is the tenth consecutive year of the World Energy Council’s (the Council) annual survey of key challenges and opportunities facing energy leaders in managing and shaping Energy Transitions. This year’s Issues Monitor report provides seven global maps six regional maps and fifty national maps.These maps have been developed by analysing the responses of nearly 2300 energy leaders drawn from across the Council’s diverse and truly global en Read More

The paper presents an overview of the main results of the EC NOE HySafe activity to estimate an allowable hydrogen permeation rate for automotive legal requirements and standards. The work was undertaken as part of the HySafe internal project InsHyde.A slow long term hydrogen release such as that due to permeation from a vehicle into an inadequately ventilated enclosed structure is a potential risk associated with the use of hydrogen in automotive Read More