Conversion Thermodynamique de l'Energie Solaire dans des Installations de Faible ou de Moyenne Puissance : Réflexions sur le Choix du Meilleur Degré de Concentration (original) (raw)

We present initially a summary recall of the state of the art of the systems of low or average power of conversion per thermodynamic way of solar energy into electric power. The current systems are primarily based on technology known as ' solar dish/Stirling', which uses Stirling engines at high temperature and thus requires a strong concentration of solar energy. These systems call upon a advanced and heavy technology, therefore expensive. With the other extreme, it is possible to produce mechanical energy by thermal engines at very low temperature, using the solar radiation not concentrated. We show, using a simple small size, that, because of the deterioration of the output of the solar collector with the temperature, the systems with very strong concentration present, from the energy point of view, a limited interest. An example of system without concentration shows that the latter are economically not very viable. The best way thus seems to be that of the systems with a...

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