Energy utilization system and method for producing carbon-containing material

An energy utilization system comprising:

• a circulation circuit configured to circulate a heating medium;
• and
• a heat pump,
• the circulation circuit including
• a pump configured to receive the heating medium and output the heating medium,
• a heating section configured to heat the heating medium by using renewable energy or energy obtained from waste heat,
• an electrolytic reduction apparatus configured to heat an electrolytic solution with heat from the heating medium, and
• a thermal energy recovery section,
• the heat pump being configured to be driven by using electric power generated with the renewable energy and to allow a first refrigerant to circulate therein,
• the circulation circuit including a storage section configured to store heat from the heating medium as stored energy,
• the heating section being configured to heat the heating medium with heat from the first refrigerant heated by the heat pump,
• the thermal energy recovery section being a heat engine configured to generate electric power by using the stored energy, and
• the electrolytic reduction apparatus being configured to apply a voltage to the electrolytic solution by using electric power generated by the heat engine.