| 摘要 |
<p>A device for use in a solar energy collecting device adapted to concentrate solar energy to heat fluid medium therein comprising an upright stem and an upper member having a concavely curved downwardly facing underside arranged symmetrically above the stem. Each of the stem and the upper member has fluid passage means associated therewith through which fluid can pass, the outer surface of the stem and the underside of the upper member serving as heat energy collecting surfaces which are thermally coupled to the fluid passage means so as to comprise heat exchange means. The heat exchange means of the upper member forms the main heat energy collecting part of the device. The downwardly facing upper member may be supported by at least two generally radially directed spokes having minimal thickness so as to cast minimal shadow on the underside of the said upper member. The upright stem may extend upwardly only up to the point where the spokes radiate outwardly, so that there is minimal obstruction to cast a shadow.</p> |
