POSTER SUBMISSION CATEGORY

MODELING THE HUMIDITY PHASE CHANGE IN LARGE SCALE LIQUID HYDROGEN SPILLS

Stella Giannissi / Environmental Research Laboratory, National Centre for Scientific Research Demokritos / GreeceSTELLA GIANNISSI / ENVIRONMENTAL RESEARCH LABORATORY, NATIONAL CENTRE FOR SCIENTIFIC RESEARCH DEMOKRITOS, 15341 AGHIA PARASKEVI / GREECE
A .G. VENETSANOS / ENVIRONMENTAL RESEARCH LABORATORY, NATIONAL CENTRE FOR SCIENTIFIC RESEARCH DEMOKRITOS, 15341 AGHIA PARASKEVI / GREECE
G. MOMFERATOS / ENVIRONMENTAL RESEARCH LABORATORY, NATIONAL CENTRE FOR SCIENTIFIC RESEARCH DEMOKRITOS, 15341 AGHIA PARASKEVI / GREECE
N. MARKATOS / NATIONAL TECHNICAL UNIVERSITY OF ATHENS, HEROON POLYTECHNIOU / GREECE

Hydrogen is considered the future fuel for neutral climate change. Due to its low volumetric energy content it is commonly stored in liquid state. In case of an accidental leak of liquid hydrogen (LH2) complex phenomena take place. One of these phenomena that can influence the vapour cloud dispersion and its subsequent safety features is the liquefaction and even freezing of ambient humidity. This work aims to investigate the humidity effect on mixture dispersion resulting from LH2 large scale spills and on the safety distances. For that purpose CFD simulations are performed using the homogeneous mixture model and the Raoult’s law for the phase distribution of the multicomponent, multiphase system. The simulations are based on the NASA-6 experiment related to LH2 vertical spill in open obstructed environment. Several humidity levels are tested and the effect of modelling the humidity phase change is examined.

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