Hybrid solar heat power generation device

Abstract

Lower heat-collection efficiency and a much smaller amount of solar heat may result from the providing of only a single receiver on a supporting post to collect lights coming from both heliostats located at nearby positions and heliostats located at faraway positions. A solar heat power generation device to be provided by the invention can avoid such problems. The solar heat power generation device has the following characteristic features. The solar heat power generation device comprises: a supporting post 4 including a receiver 1 that receives sunlight; and a plurality of heliostats 6 which are provided concentrically around the supporting post 4 and which reflect the sunlight towards the receiver 1 . The supporting post 4 includes at least two receivers 1 a and 1 b that are arranged in the up-and-down direction. The receiver 1 a provided at an upper-side position receives reflected lights L 1 coming from the heliostats 6 a located at faraway positions, and the receiver 1 b provided at a lower-side position receives reflected lights L 2 coming from the heliostats 6 b located at nearby positions.

1 . A solar heat power generation device comprising:
 a supporting post including a receiver that receives sunlight; and   a plurality of heliostats which are provided so as to surround the supporting post and which reflect the sunlight towards the receiver,   the solar heat power generation device characterized in that   the supporting post includes at least two receivers that are arranged in the up-and-down direction,   the receiver provided at an upper-side position receives reflected lights coming from the heliostats located at faraway positions, and   the receiver provided at a lower-side position receives reflected lights coming from the heliostats located at nearby positions.   
     
     
         2 . The solar heat power generation device according to  claim 1  characterized in that, when the light intensity of a reflected light received by a receiver with a 90-degree incident angle is 100%, each of the receivers receives the reflected lights coming from heliostats located at positions such that a light intensity of 60% or higher is achieved by each reflected light received by the corresponding receiver. 
     
     
         3 . The solar heat power generation device according to  claim 1  characterized in that
 an incident angle of the reflected light reflected by each heliostat located far away from the supporting post towards the receiver provided at the upper-side position is set at 75° to 105°, and 
 an incident angle of the reflected light reflected by each heliostat located near the supporting post towards the receiver provided at the lower-side position is set at 75° to 105°. 
 
     
     
         4 . A solar heat power generation device comprising:
 a supporting post including receivers that receive sunlight; and   a plurality of heliostats which are provided so as to surround the supporting post and which reflect the sunlight towards the receivers,   the solar heat power generation device characterized in that   one of the receivers is provided at an upper-side position on the supporting post, the one receiver receiving reflected lights coming from the heliostats located at faraway positions, and   a center reflector is provided at a lower-side position on the supporting post, the center reflector receiving reflected light coming from the heliostats located near the supporting body, and   another one of the receivers is provided below the center reflector, the other receiver receiving the sunlight having been reflected by the center reflector.   
     
     
         5 . A solar heat power generation device characterized in that
 at least three supporting posts are assembled together to form a pyramid shape,   a columnar body is provided so as to extend upwards from upper-end sides of the supporting posts,   a center reflector is fixed to the supporting posts that have been assembled together to form the pyramid shape,   in addition, receivers are provided below the center reflector and on the columnar body,   the receiver provided on the columnar body receives reflected lights coming from heliostats provided far away from the supporting posts, and   the center reflector receives reflected lights coming from heliostats provided near the supporting posts, and the receiver provided on the supporting posts receives the lights passed on to the receiver by the center reflector.   
     
     
         6 . The solar heat power generation device according to  claim 4  that includes: the supporting post equipped with the center reflector; and the plurality of heliostats provided so as to surround the supporting post,
 the solar heat power generation device characterized by comprising: 
 a frame formed in an arc shape that fits a wall surface of the center reflector having a semicircular arc sectional shape, the frame having one of its ends supported by the supporting post; 
 a cleaning robot which is attached to the frame so as to be capable of moving along the frame; and 
 moving means for moving the frame with the cleaning robot in a circumferential direction of the center reflector; and 
 the solar heat power generation device characterized in that 
 the cleaning robot includes a spray device that sprays a cleaning liquid onto the wall surface of the center reflector. 
 
     
     
         7 . The solar heat power generation device according to  claim 4  characterized in that
 the receiver provided below the center reflector includes a cone-shaped light receiving portion, and 
 dust-prevention means for allowing the transmission of the sunlight therethrough but for blocking entry of dust such as sand is provided to cover a light entrance for the sunlight formed in the light receiving portion.