Abstract: Solar-tower power plant, including a tower having a base and an upper end, an array of mirrors disposed around the base of the tower, a solar heater being disposed at the upper end of the tower and having a cavity formed therein defining a wall adjacent to the cavity, the cavity wall having a radiation input opening formed therein defining an edge of the cavity wall, the solar heater being heatable by radiation reflected and concentrated by the mirror array and received through the radiation input opening, a first coolant loop connected to the solar heater for utilizing radiation heat therefrom, a second coolant loop, a radiation heat exchanger having tubes and being connected to the second coolant loop, the radiation heat exchanger being disposed at the edge of the cavity wall and having a surface being disposed outside the cavity wall and facing the mirror array.