A method for fabricating a heat exchange construct is provided.

A novel flat heat absorber for solar tower power generation and a system using same. The system includes a windshield, a flat heat absorber, and a circulation pipeline. The flat heat absorber is for photothermal conversion and heat energy transfer, the windshield prevents heat loss of the heat absorber, and the circulation pipeline ensures the circulation of a working fluid. In a working process, a heat transfer fluid in the flat heat absorber absorbs heat and evaporates from an evaporation surface, releases heat and condenses on a condensation surface, the condensed heat transfer fluid flows back to the evaporation surface to enter circulation work of a next round, and heat is transferred to the working fluid by means of a gas-liquid phase change process.