A laboratory duplication of ice crystals clogging the Fuel-Oil Heat Exchanger on a Rolls-Royce Trent 800 engine is shown in photo from NTSB, Safety Recommendations A-09-17 and A-09-18.

Boeing has completed flight tests of a modified fuel-metering unit and fuel-oil heat-exchanger (FOHE) on a new British Airways Rolls-Royce Trent 800-powered 777-200ER. The modified system is ...

Called a fuel-oil heat exchanger, it serves the dual purpose of cooling hot engine oil and transferring heat to raise the temperature of fuel flowing to the engines.

This is really nothing new here. The SR-71 Blackbird used its fuel as a coolant too. The heat picked up from the air frame by the fuel was then put to use, because the higher temperature ...

Gas oil commonly boils in the 650-1,050° F. range. Gas oil for a conventional cat cracker comes primarily from the atmospheric tower, vacuum tower, and delayed coker.