The present invention is to provide a combined cycle power generation system, a fuel cell combined power generation method, and as for, which improved the overall power generation efficiency of the combined cycle system to solve the conventional problems.
As a means for resolving the above technical problem, the present invention provides an organic Rankine cycle power system to develop using the heated working fluid in the combined cycle power generation system including a fuel supply system of constant pressure the fuel gas so that the predetermined pressure comprising the organic Rankine cycle power generation system provides the composite power generation system the working fluid to cool the fuel gas and the cross heat the working fluid by the exchange of the fuel supply system, or heat the fuel gas in the fuel supply system do.
Combined cycle power generation system and the combined cycle power generation method including them than the fuel cell, according to the invention can improve the overall power generation efficiency of the combined cycle power generation systems, and at the same time, the power generation efficiency is affected by the gas amount changes in the demand of the fuel supply system It can be reduced.