| 摘要 |
PROBLEM TO BE SOLVED: To enable a large area to receive light in a low posture by a method wherein the thickness of a heat receiving apparatus in a direction, in which the sun is viewed. is made thin to collect heat at high temperatures, and the number of drive mechanisms for a light receiving area is reduced. SOLUTION: A first parabolic reflector 40a or a plane mirror, a second parabolic reflector 52 and a photothermic conversion block 61 are provided in a box body surrounded with a plane plate glass 36 or a Fresnel lens, and plates 31, 33, so that incident rays are reflected repeatedly in the box body and passed through a long optical path and then a fluid space 77 of the block 61 to collect and project the rays of the sun into a heat exchange fluid outlet tube 74. The inner surface of the tube 74 is a black surface for photothermic conversion and photothermic conversion is mainly effected within the tube 74. Dry air or inert gas is sealed in the box body through a valve device. And 64 heat collecting apparatuses 22-(24), in total, are supported by a supporter group of 4×4=16 matrix arrangements wherein four AZ axes are supported by each EL axis. One driver AZ drives four supporters.
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