Complex power generation system and method for supplying heated water thereof

A complex power generation system, comprising:

• a fuel cell module having a first and a second heat exchanging unit and generating a DC current by an electrochemical reaction between hydrogen and oxygen;
• a first cycle receiving warm water within a first temperature range from the first heat exchanging unit and supplying the received warm water to a heat pump, and receiving warm water within a second temperature range from the heat pump and supplying the received warm water to the first heat exchanging unit;
• a second cycle receiving warm water within a third temperature range from the heat pump and discharging warm water within a fourth temperature range through the second heat exchanging unit;
• and
• wherein the second cycle is connected to a heating cycle including a plurality of heat consumption units, and
• wherein the warm water supplied from the second cycle to the heat pump is warm water within a fifth temperature range introduced from the heating cycle.