Optimizing engine design to take full
advantage of unique cryogenic
properties of hydrogen will be key –
that’s the essence of the Pratt &
Whitney's Hydrogen Steam
Injected, Inter‐Cooled Turbine
Engine (HySIITE) project.
HySIITE will use liquid hydrogen
combustion and water vapor
recovery to achieve zero in-flight
CO2 emissions, while reducing
nitrogen-oxide (NOx) emissions by
up to 80 percent and reducing fuel
consumption by up to 35 percent for
next generation single-aisle aircraft.