Abstract: Provided is a solar light concentrating system which realizes suppression of power generation costs by applying a receiver 2 that is capable of suppressing a manufacturing cost to a low level, facilitating recovery work when a failure occurs, and quickly recovering a heating medium circulating inside in case of an emergency. The receiver 2 is formed by three-dimensionally combining multiple modules 20. At least a part of the modules is a trapezoid-shaped module 20B. The trapezoid-shaped module includes an upper header 21B, a lower header 22B being shorter than the upper header, and multiple heat receiving tubes 23 which connect the two headers. The heat receiving tubes are formed by successively altering their cross-sectional shapes in away that makes each heat receiving tube 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.

Abstract: A sunlight collecting system and a solar energy utilization system which collects sunlight with the sunlight collecting system are provided, a sunlight collecting system including a solar heat collector which includes a heat collecting element which is formed by a helically wound heat exchange medium circulation pipe inside which the heat exchange medium flows, in such a way to have an incurved light receiving surface which narrows and converges towards the sunlight inlet and a sunlight collecting reflector which includes a reflector group which includes a plurality of reflector segments each of which includes a reflecting surface which makes sunlight converge on a heat collector, a sunlight collecting system in which a plurality of heliostats Bm are arranged in places which are irradiated by the sunlight between a plurality of heliostats An, in which each of the heliostats An and the heliostats Bm reflect light in a direction to a light collecting point of a heliostat group in which the heliostat is included

Abstract: Provided is a solar light concentrating system which realizes suppression of power generation costs by applying a receiver 2 that is capable of suppressing a manufacturing cost to a low level, facilitating recovery work when a failure occurs, and quickly recovering a heating medium circulating inside in case of an emergency. The receiver 2 is formed by three-dimensionally combining multiple modules 20. At least a part of the modules is a trapezoid-shaped module 20B. The trapezoid-shaped module includes an upper header 21B, a lower header 22B being shorter than the upper header, and multiple heat receiving tubes 23 which connect the two headers. The heat receiving tubes are formed by successively altering their cross-sectional shapes in away that makes each heat receiving tube 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.

Abstract: It enhances heat collecting efficiency of sunlight received by heliostats. It is a solar light collecting method in a multi-tower beam-down light collecting system, including a tower selection. The multi-tower beam-down light collecting system is a system in which, in a field where a plurality of beam-down light collecting towers are present, light primarily reflected by heliostats 1 around each tower 4 is secondarily reflected by a reflector 3 at a top part of the tower 4 and is collected on a receiver 3 on the ground, and the tower selection is a process in which, assuming that the heliostat 1 in a given position receives sunlight and reflects the sunlight toward each of optionally selected two of the towers 4, 4, a light receiving quantity on the receiver 3 of each of the towers 4 is compared, and one of the towers 4 in which the light receiving quantity is relatively large is selected to reflect the sunlight toward the one of the towers 4.

Abstract: A sunlight collecting system and a solar energy utilization system which collects sunlight with the sunlight collecting system are provided, a sunlight collecting system including a solar heat collector which includes a heat collecting element which is formed by a helically wound heat exchange medium circulation pipe inside which the heat exchange medium flows, in such a way to have an incurved light receiving surface which narrows and converges towards the sunlight inlet and a sunlight collecting reflector which includes a reflector group which includes a plurality of reflector segments each of which includes a reflecting surface which makes sunlight converge on a heat collector, a sunlight collecting system in which a plurality of heliostats Bm are arranged in places which are irradiated by the sunlight between a plurality of heliostats An, in which each of the heliostats An and the heliostats Bm reflect light in a direction to a light collecting point of a heliostat group in which the heliostat is included

Abstract: A condensation curable organopolysiloxane composition, capable of curing in the presence of moisture in air to become a rubber-like elastic material, comprising a compound having at least one carbon-bonded hydroxyimino group in its molecule. The composition is capable of inhibiting effectively, and for a long time, the propagation of any of a variety of fungi on the surface of a cured product of the composition.