Cogeneration system

A cogeneration system comprising:

• a high-temperature operative fuel cell configured to generate electric power through a power generation reaction by using a fuel supplied to the fuel cell and air supplied to the fuel cell;
• a combustor configured to combust unconsumed fuel from the high-temperature operative fuel cell and to generate combustion heat;
• a reformer configured to generate a reformed gas which becomes the fuel, through a reforming reaction between a raw material gas supplied to the reformer and a steam supplied to the reformer, by utilizing power generation reaction heat generated in the high-temperature operative fuel cell and the combustion heat generated by the combustor;
• a vaporizer configured to generate the steam to be added to the raw material gas supplied to the reformer by utilizing the power generation reaction heat and the combustion heat;
• a cooling apparatus configured to cool a target by consuming a portion of the power generation reaction heat and a portion of heat of an exhaust gas having the combustion heat which remain after the reformer and the vaporizer have consumed the heat, and cool the exhaust gas by consuming a portion of the heat;
• and
• a condensation unit configured to cool the exhaust gas after the cooling apparatus has consumed the portion of the heat owned by the exhaust gas to condense a moisture contained in the exhaust gas to generate condensed water, wherein:
• the condensation unit includes:
• a first heat exchanger configured to heat the raw material gas to be supplied to the vaporizer by utilizing heat of the exhaust gas after the cooling apparatus has consumed the portion of the heat;
• and
• a second heat exchanger configured to heat the air to be supplied to the high-temperature operative fuel cell by utilizing the heat of the exhaust gas after the first heat exchanger has utilized the heat and to condense the moisture contained in the exhaust gas to generate the condensed water,
• the cogeneration system further comprises a water transporting unit configured to transport the condensed water generated from the exhaust gas by the second heat exchanger, to the first heat exchanger,
• the condensed water transported by the water transporting unit is mixed with the exhaust gas to generate the exhaust gas containing the condensed water as the steam, and
• the first heat exchanger causes the steam contained in the exhaust gas to be transferred to the raw material gas to heat and humidify the raw material gas.