| 摘要 |
Solar concentrators which transform solar energy into both electrical energy and heat energy do not control the proportion of electrical energy produced relative to that of the heat energy produced. This proportion is left to the random fluctuations in the intensity of the sunlight, yet it can be advantageous to prioritise the production of one kind of energy relative to another. The invention describes a device which allows said control over production. Said device consists of a solar concentrator lens (1), preferably a Fresnel lens (1), and a target consisting for example of a photovoltaic cell (4) and a thermal sensor (5) positioned at least at the periphery of the cell (4). The distance (D2) between the Fresnel lens (1) and the cell (4) is variable, which also results in a variation in the size of the illumination surface (7B) of the solar radiation concentrated (3) on the target. When the size of the illuminated surface (7B) is small, the light intensity is high and is centred on the photovoltaic cell (4) which therefore produces maximum electrical energy. When the size (7B) is large, the light intensity is lower and is also distributed over the surface of the thermal sensor (5) positioned at the periphery, which produces more heat energy and less electrical energy. Automatic regulation is provided to regulate the light intensity received by the cell (4) even during variations in the sunlight. |
