SayPro If one, some or all of the following are necessary for envisaged applications – a hydrogenation unit, a dehydrogenation unit, a cracker, a purification, a compression device – these, as well as all necessary auxiliaries (e.g., internal and external heat management) should be included for calculation of total system storage density, footprint, CAPEX, OPEX, etc. Hydrogenation or hydrogen processing units for loading have to be included in the system envelope only if they are necessary on-site for the storage process. E.g., a hydrogenation unit for a novel type of hydrogen carrier, operated at a different site than that of the novel storage system, does not have to be included, but may be described for clarification of advantages of the proposed storage technology.