Fuel production system

A fuel production system, comprising:

• a synthesis gas generation unit configured to generate synthesis gas containing hydrogen and carbon monoxide from carbon-containing raw material;
• a fuel production unit configured to produce fuel from the synthesis gas generated by the synthesis gas generation unit;
• a water electrolyzer configured to electrolyze water to generate water-electrolyzed hydrogen;
• a hydrogen supply unit configured to supply the water-electrolyzed hydrogen generated by the water electrolyzer to the synthesis gas generation unit;
• and
• a controller including an arithmetic unit and a storage unit, wherein
• the controller is configured to perform:
• calculating an input energy based on a first energy possessed by the carbon-containing raw material, a second energy consumed by the water electrolyzer when generating the water-electrolyzed hydrogen, a third energy consumed by the synthesis gas generation unit when generating the synthesis gas, and a fourth energy consumed by the fuel production unit when producing the fuel;
• calculating a recovered energy based on a fifth energy possessed by the fuel produced by the fuel production unit;
• and
• determining a supply amount of the water-electrolyzed hydrogen to be supplied by the hydrogen supply unit based on the input energy and the recovered energy calculated.