Fuel supply system for hydrogen aircraft, and tank internal pressure adjustment method

A method of adjusting a tank internal pressure for a hydrogen-powered aircraft which includes:

• a propulsion device that uses hydrogen as an energy source;
• a fuel tank that stores liquefied hydrogen;
• a pump that discharges the liquefied hydrogen from the fuel tank to supply the liquefied hydrogen to the propulsion device;
• a pressure increasing mechanism that increases a tank internal pressure being a pressure in an inner part of the fuel tank, the pressure increasing mechanism including a heater arranged in the fuel tank;
• and
• a manipulation device that receives a manipulation to the hydrogen-powered aircraft,
• the method comprising
• controlling the pressure increasing mechanism to adjust the tank internal pressure on the basis of any information of information about an output of the propulsion device, information about a flow rate of the liquefied hydrogen discharged from the fuel tank to the propulsion device, and information about the manipulation to the manipulation device;
• estimating an increase or decrease in a discharge flow rate of liquefied hydrogen from the fuel tank in response to an input to a manipulation device and transmitting flow rate increase information or flow rate decrease information is transmitted to the pressure controller, and
• controlling, by the pressure controller, the heater, based on the flow rate increase information or the flow rate decrease information.