Methods and systems for starting hydrogen powered gas generators

A method of performing a startup operation of a hydrogen-burning turbine engine, the method comprising:

• controlling a valve to supply liquid hydrogen from a fuel supply to a first hydrogen-burning turbine engine to convert the liquid hydrogen to gaseous hydrogen in a first fuel conditioning heat exchanger using waste heat generated by the first hydrogen-burning turbine engine and combusting the gaseous hydrogen in the first hydrogen-burning turbine engine during a normal operation;
• determining that the first hydrogen-burning turbine engine has a combustor flame-out condition;
• upon determining the first hydrogen-burning turbine engine has the combustor flame-out condition, controlling the valve to stop supplying the liquid hydrogen to the first hydrogen-burning turbine engine and to route the liquid hydrogen from the fuel supply to a second hydrogen-burning engine, wherein a second fuel conditioning heat exchanger of the second hydrogen-burning engine is configured to convert the liquid hydrogen to gaseous hydrogen;
• supplying the gaseous hydrogen to the first hydrogen-burning turbine engine from the second fuel conditioning heat exchanger to perform the startup operation via combustion of the gaseous hydrogen within the first hydrogen-burning turbine engine;
• and
• after the first hydrogen-burning turbine engine is started and returned to the normal operation, controlling the valve to redirect the liquid hydrogen from the fuel supply to the first hydrogen-burning turbine engine to convert the liquid hydrogen to gaseous hydrogen in the first fuel conditioning heat exchanger using the waste heat generated by the first hydrogen-burning turbine engine during the normal operation.