Patent ID: 8726899

Claim:
A solar light concentrating system for extracting energy from a heating medium, comprising: a heat receiving unit including a plurality of modules combined three-dimensionally, in which at least some of the modules are trapezoid-shaped, wherein: each trapezoid-shaped module comprises an upper header, a lower header shorter than the upper header, a plurality of heat receiving tubes connecting the two headers together, a solar light receiving face, a back face on an opposite side from the solar light receiving face, and heat insulating material placed on the back face, the heat receiving tubes of each trapezoid-shaped module having cross-sectional shapes successively altered in a way that each heat receiving tube is shaped like a wedge that becomes narrower from its top toward its bottom in a front view, and like a wedge that becomes wider from its top toward its bottom in a side view, and a heating medium circulating inside the modules; and a plurality of heliostats for reflecting solar light to the heat receiving unit.