hydrogen_joe
Mechanical
Hi, thanks for reading
I am a grad who is working in hydrogen refueling systems. I am working on analysis on potential leaks at the moment as its key these are properly assessed and managed when working with hydrogen, for obvious reasons.
Our system is storing compressed hydrogen at 500 bar, from this I have estimated the mass flow rate of any leaks using the assumption of choked flow through the orifice. As per an equation similar to this:
The ATEX standards require calculation of volumetric flow through the orifice by dividing through by hydrogen density. They seem to require that the atmospheric density of hydrogen is used rather than at 500bar? Does anyone know why we wouldn't use the density of the compressed hydrogen which 'is' leaking?
I assume there is some pressure distribution across the leaking area (thickness) from 500 - 1 bar but I can't understand why we are required to use the atmospheric density?
Thanks in advance
Joe
I am a grad who is working in hydrogen refueling systems. I am working on analysis on potential leaks at the moment as its key these are properly assessed and managed when working with hydrogen, for obvious reasons.
Our system is storing compressed hydrogen at 500 bar, from this I have estimated the mass flow rate of any leaks using the assumption of choked flow through the orifice. As per an equation similar to this:
The ATEX standards require calculation of volumetric flow through the orifice by dividing through by hydrogen density. They seem to require that the atmospheric density of hydrogen is used rather than at 500bar? Does anyone know why we wouldn't use the density of the compressed hydrogen which 'is' leaking?
I assume there is some pressure distribution across the leaking area (thickness) from 500 - 1 bar but I can't understand why we are required to use the atmospheric density?
Thanks in advance
Joe