The delivery hydrogen uptake was specified to the difference between H2 uptake at charging pressure (say 100 bar) and discharging pressure (say 5 bar) both at the same temperature (e.g. 77 K). But I think it should be the difference between H2 uptake at charging pressure and temperature (say 100 bar and 77 K) and that of discharging pressure and temperature (say 5 bar and 300 K). If the working temperature is about the room temperature. What do you think?
I believe you are talking about adsorbent storage. If this is the case, yes in general I agree with your statement. However, it depends on the scenario, if it is automotive application increasing the temperature from 77K to 300K would require important heating power. A temperature of about 180 K might be a good temperature to achieve already a good delivery uptake value. Again, everything depends on the scenario anyway.
Dear Claudio, thermal equilibration with environment could raise the temperature from 77 to 300 K (ambient temperature). What do you think?
Dear Roland,
As you may know, in cryo-adsorption H2 storage, the vessel's architecture is so that LN circulates around/within the tanks and after cooling down it pumps out (attached figure). Hence, getting to RT due to the thermal equilibration is possible especially for automotive applications. Am I right?
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