ENERGY MANAGEMENT SYSTEM

An energy management system is provided with a fuel synthesizing apparatus, a power generation apparatus, a COrecovering unit, a compressor, a COstorage unit, a COpressure reducing unit and a heat recovery unit. The fuel synthesizing apparatus generates hydrocarbon from HO and COusing externally supplied power. The power generation apparatus generates power using the hydrocarbon. The COrecovering unit recovers COfrom an exhaust gas exhausted from the power generation apparatus during a power generation. The compressor compresses the recovered CO. The COstorage unit stores the COcompressed by the compressor. The COpressure reducing unit depressurizes the COstored in the COstorage unit in order to supply the fuel synthesizing apparatus therewith. The heat recovery unit recovers heat from the CO, the heat having been stored in the COwhen compressed or depressurized.