A multi-function bundle having all of the basic support functions
integrated therein can be used as a basic building block component, for
example, in a fuel cell engine. The multi-function bundle is modular,
easy to assemble, and able to withstand the physical and thermal shocks
encountered in mobile applications. The multi-function bundle utilizes
fully distributed fuel and oxidant supply systems which help to reduce
temperature gradients throughout the array of fuel cells. The
multi-function bundle may be comprised of a plurality of fuel cells, an
oxidant supply system, a fuel supply system and a support structure which
integrates the fuel cells, oxidant supply system, and fuel supply system
into a single unit. The oxidant and fuel supply systems may be fully
distributed. The fuel supply system may include one or more fuel feed
tube assemblies which allow distributed internal fuel reformation and
reduce temperature gradients throughout the array of fuel cells.