Solar power generation system

A solar power generation system comprising:

• a concentrator that collects solar heat;
• an absorber having a cylindrical shape in which one side of the absorber is open so that a cavity to which solar heat collected by the concentrator is transferred, is formed in the absorber;
• heat pipes being disposed to surround the periphery of the absorber in the longitudinal direction, each of the heat pipes having a bent pipe shape and being radially arranged and absorbing heat of the absorber;
• a first heat exchanger comprising a circulation pipe in which a circulation fluid that circulates by performing heat-exchanging with the heat pipes and by absorbing heat is filled, and a casing formed to surround the circulation pipe and the heat pipes, a front side of the casing having an opening for collecting the solar heat;
• and
• an alkali metal thermal to electric converter (AMTEC) that is disposed so that the circulation pipe passes through the AMTEC and that generates electricity by receiving heat from the circulation pipe;
• and
• a second heat exchanger that connects the circulation pipe of the first heat exchanger and the AMTEC and performs heat-exchanging between the circulation pipe and the AMTEC,
• wherein the circulation pipe is directly in physical contact with a surface of a rear side of the casing and passes through the second heat exchanger and the circulation pipe is parallel to the surface of the rear side of the casing.