Hydrogen compression to storage vessel
Hydrogen compression to storage vessel
(OP)
Hello all,
I want to ask if there is any rule of thumb for selecting discharge pressure of hydrogen gas compressor used to fill a hydrogen storage vessel, in relation with the storage vessel maximum pressure.
The compressor is reciprocating (piston), although the quantity compressed is constant, when the vessel is empty the compressor works against lower pressure, as the vessel fills the pressure difference between the compressor discharge and the vessel decreases.
Will the rate of filling decrease in this case ? and should we always keep a specific difference between the comressor pressure and the vessel pressure to keep good filling rate ?
Any comments ?
I want to ask if there is any rule of thumb for selecting discharge pressure of hydrogen gas compressor used to fill a hydrogen storage vessel, in relation with the storage vessel maximum pressure.
The compressor is reciprocating (piston), although the quantity compressed is constant, when the vessel is empty the compressor works against lower pressure, as the vessel fills the pressure difference between the compressor discharge and the vessel decreases.
Will the rate of filling decrease in this case ? and should we always keep a specific difference between the comressor pressure and the vessel pressure to keep good filling rate ?
Any comments ?





RE: Hydrogen compression to storage vessel
Recips are not hurt by increasing discharge pressure up to the point where the ratios get too high and the machine goes into rod load or high temperature shut down. A multi-stage recip can get into trouble early since blow through in the first stage can result in rod load in the second stage.
David