Nico Bouwkamp's poster presentation about J2601 bus fueling protocol currently under development by SAE as given at Fuel Cell Seminar 2013.

1. SAE TIR J2601/2 Hydrogen Transit Bus Fueling
#201
Nico Bouwkamp, Technology Analyst
California Fuel Cell Partnership
(nbouwkamp@cafcp.org)
Context
Preliminary fueling rates
Globally, over 80 hydrogen fuel cell transit buses are
operational in daily public revenue service, with more
planned for operation. These buses are fueled daily
with up to 40 kilograms of H35 . Currently, no
published standard for fueling these buses that
establishes safety limits or performance requirements
is in place.
 Option A – Fast Fueling
For fast fueling of buses, up to 7.2 kilograms per
minute or 120 grams per second
 Option B – Normal Fueling
For normal fueling of buses, up to 3.6 kilograms
per minute or 60 grams per second
 Option C – Slow Fueling
Scope
The scope of this effort is to provide boundary
performance requirements for dispensing systems
used for fueling 35 MPa heavy duty hydrogen transit
buses. These can be used as guidance to those
building fueling systems and hydrogen fuel cell buses,
and transit bus operators.
For slow fueling of buses, up to 1.8 kilograms per
minute or 30 grams per second
Figure 2: Operating window for pressure and temperature
Boundary conditions (Figure 2)
Communication for fueling
 In-advance communication
Application
 Heavy
duty hydrogen transit buses with a tank storage
capacity >10 kilograms of 35 MPa hydrogen
 Fueling buses to a full fill or ≤100% State of Charge
between bus OEM and station implementer
 Active communication
between station & vehicle, using SAE J2799 or J1939
 Bulk hydrogen gas T within vehicle fuel tanks: ≤ 85°C
 T fuel at dispenser nozzle: ≥ - 40°C
 State of charge ≤ 100%
Recommended actions
Project participants
SAE TIR J2601/2 task force participants
Figure 1: AC Transit fueling station (Photo courtesy of L. Eudy, NREL)
 Max P within vehicle tank system: 125% NWP
 Implement a verification process for faulty tank valves
Figure 3: SunLine FCEB
Figure 4: AC Transit FCEB