AE - alkaline electrolysis
CCUS - carbon capture, utilization, and storage
CHP - combined heat and power
EJ - exajoule
FCEV - fuel cell electric vehicle
GWh - gigawatt-hour
HHV - higher heating value
kWel - kilowatt electric
kWh - kilowatt-hour
LOHC - Liquid Organic Hydrogen Carrier
MMBtu - million British thermal units (1 MMBtu = 26.4 m3 natural gas at 11 kWh/m³)
MPa - megapascal
MWel - megawatt electric
MWh - megawatt-hour
PEM - Proton Exchange Membrane
SOE - Solid Oxide Electrolysis
YSZ - yttria-stabilized zirconia