| 摘要 |
Solar energy collecting panel, in particular for high temperatures, having a good efficiency substantially due to the reduction of the losses caused by radiation from the inner layers of the panel, at wavelengths to which the glass is transparent. The reduction of these losses is obtained by a panel construction comprising at least two inner parallel glass plates capable of defining air flow passages in parallel, at least with respect to the inner glass which is the nearest to the outer cover plate, in order to cool these air layers. The circulation of air within the panel can be of the forced type by means of an external fan, in a closed or open circuit, or due to convection air streams generated in contact with the absorbing plate at the panel bottom. In a particular embodiment the panel has a tubular shape, with the absorber surface, the inner glasses and the outer cover all cylindrical and coaxial.
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