Automotive Engineering - February 2023 - 16

TIME
FOR
HYDROGEN
Intense development
has made fully-dressed
automotive fuel-cell
stacks like this BMW
iX5 unit as packageefficient
as a smalldisplacement
ICE.
No longer '20 years in the future,' hydrogen and fuel cells are a vital, highgrowth
solution for carbon reduction across the transportation and other
industry sectors.
by Lindsay Brooke
A
fter decades of R&D, some false starts and a smattering of
low-volume production vehicles, hydrogen has emerged as
a vital enabler for carbon reduction across the transportation
sector. In gaseous form, the lightest and most abundant
chemical element is an efficient energy carrier and battery-like
storage medium. When produced from decarbonized sources and
used in fuel-cell systems, hydrogen can be a genuinely low- or zeroemission
source of electricity.
Energy-grid experts increasingly see hydrogen as a valuable " knob
to turn, " broadening renewables' effectiveness by serving as a loadbalancer
for wind and solar. For vehicle engineers and customers,
hydrogen fuel cells - with an energy-to-weight ratio 10X greater
than lithium batteries - offers some key practical advantages over
battery-electric propulsion. Time required to fill a 350- or 700-bar
16 February 2023
(5,000- or 10,000 psi) high-pressure storage tank is as
quick as topping up with gasoline or diesel. And compared
with the ponderous mass of large-EV battery
packs - 3,000 lb. (1360 kg) in GM's Hummer EV and
an estimated 10,000 lb (4536 kg) in Tesla's Class-8
Semi - a fuel-cell propulsion system with similar performance
is a veritable lightweight.
Fuel cells' performance and efficiency are indeed a
logical fit in commercial vehicles, according to a dozen
industry experts interviewed for this article. The
aim is to replace the reliable and durable heavy-duty
diesel engine - admittedly a tough bogey. Daimler,
Hyundai, Kenworth (using a Toyota fuel-cell stack),
Nikola and Volvo have pilot fleets of hydrogen fuelAUTOMOTIVE
ENGINEERING
BMW

Automotive Engineering - February 2023

Table of Contents for the Digital Edition of Automotive Engineering - February 2023

Automotive Engineering - February 2023 - INTRO1
Automotive Engineering - February 2023 - SPONSOR1
Automotive Engineering - February 2023 - CVRA
Automotive Engineering - February 2023 - CVRAB
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