Balloon comprising photovoltaic means and an apparatus for concentrating sun light

摘要

The balloon has an envelope comprising a first zone (ZT) transparent to solar rays (R), where the balloon is equipped with a photovoltaic unit i.e. photovoltaic panel, exhibiting active face (Fa) to receive solar rays. A second zone (ZR) reflects the solar rays. A third zone (ZC) comprises the photovoltaic unit. The active face of the photovoltaic unit is directed toward an inner side of the envelope. The second and third zones are attached with each other so as to reflect the solar rays in direction of the third zone. The photovoltaic unit is positioned on an outer side of the envelope.