In any overall balance of hydrogen energy systems it is the way in whi
ch this energy is generated and the primary energy required to produce
the equipment that are of decisive importance. Excerpts from the resu
lts of a study entitled ''Process Chain Analysis for a Hydrogen Energy
System'', commissioned by the Bavarian State Ministry of Economics, T
ransportation and Technology are presented and commented on. (C) 1997
International Association for Hydrogen Energy.