Concentrator for solar air heater |
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Authors: | F. Demichelis E. Minetti-Mezzetti |
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Affiliation: | (1) Istituto Fisica Sperimentale Politecnico, I-10129 Torino, Italy |
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Abstract: | A focusing collector for air heater, the concentrator being Fresnel lenses, is here examined. The sunlight is focalized on black-body metallic sheets, contained in an insulated box, through which the energy is transferred to the fluid (dry air). The sheets, having the same height, are arranged at a distance one from another increasing from the center to the edges in order to trap all the incident energy. The energy reflected by the sheets is also trapped. A thermotechnical analysis of the system in order to determine the optimal conditions for the heat transfer is reported. |
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Keywords: | 84.60 42.80 |
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