Definitions
Article 3
1
For the purposes of this Regulation, the following definitions shall apply:
a
‘hydrogen-powered vehicle’ means any motor vehicle that uses hydrogen as fuel to propel the vehicle;
b
‘propulsion system’ means the internal combustion engine or fuel cell system used to propel the vehicle;
c
‘hydrogen component’ means the hydrogen container and all other parts of the hydrogen-powered vehicle that are in direct contact with hydrogen or which form part of a hydrogen system;
d
‘hydrogen system’ means an assembly of hydrogen components and connecting parts fitted on hydrogen-powered vehicles, excluding the propulsion systems or auxiliary power units;
e
‘maximum allowable working pressure’ (MAWP) means the maximum pressure to which a component is designed to be subjected to and which is the basis for determining the strength of the component under consideration;
f
‘nominal working pressure’ (NWP) means, as regards containers, the settled pressure at a uniform temperature of 288K (15 °C) for a full container, or as regards other components, the pressure level at which a component typically operates;
g
‘inner tank’ means the part of the hydrogen container designed to use liquid hydrogen that contains the cryogenic hydrogen.
2
For the purposes of paragraph 1(d), ‘hydrogen systems’ shall include, inter alia, the following:
a
usage monitoring and control systems;
b
vehicle interface systems;
c
excess flow systems;
d
overpressure protection systems;
e
heat exchanger failure detection systems.