Numerical modelling of hydrogen release and dispersion

Hydrogen is the most abundant element on earth, being a low polluting and high efficiency fuel that can be used for various applications, such as power generation, heating or transportation. As reaction to climate change, authorities are working determining promising applications hydrogen, one of best examples crossborder initiative IPCEI (Important Project Common European Interest) Hydrogen, under development at EU level. Given large interest future uses special safety measures have implemented avoiding potential accidents. If hydrogen stored pressure, accidental leaks from pressure vessels may result in fires explosions. Worldwide, researchers investigating possible accidents generated by leaks. Special attention granted atmospheric dispersion after release, so avoid The use consequence modelling software within risk studies has shown its’ utility worldwide. In this paper, there modelled consequences release tank, using state-of-the-art QRA software. simulation methodology paper “leak” model carrying out discharge calculations. This calculates rate state gas its expansion pressure. Accidental taking into account process meteorological conditions properties point. Simulation results further land planning, establishing proper protection surrounding facilities. work, we analysed two accident scenarios which occur an imaginary refuelling station, caused vessel, with diameters 10 20 mm, tank filled 35 MPa / 70 MPa. Process Hazard Analysis Software Tool 8.4 been assessing effects evaluating hazardous extent around installation. Accident leak size important effect flammable/explosive ranges. Also, jet fire’s influence distance strongly influenced actual release.