Performances issue's analysis of an innovative low concentrated solar panel for energy production in buildings

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Abstract

The buildings are the causes of about a third of primary energy consumption in Europe and generally, they satisfy their energy needs by the connection to the outside with a complex distribution system. The main sources for this energy production comes from the combustion of non-renewable fuels as natural gas or coal; this way presents a relevant impact on the environment at different levels. Solar energy could allow reducing the building's impact on the global primary energy consumption and consequently on the environment, but generally the solar systems are selective about their output or only thermal or only electricity. In this contest, the low concentrated solar technology could be an interesting way to combine the two outputs with easy integration in the building with low impact on the architecture. The paper describes the analysis performed on a low concentration solar system; this unit has four linear semi-parabolic concentrators and the sun tracking is on only one rotational axes. The work starts from an analysis of influence of the sun angle on focus's position on the receiver by a rays trace code. This is important because the concentrator is only alienated with one sun angle thus the sun's rays are not perpendicular with the input surface. A performance analysis, using the previous out coming, are performed on a complete system with the using of the sun position during the years for a reference location. The study compares two direction for the tracking: Est-West and South-North, some different distances between the concentrators and different tilt angles.

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Cappelletti, A., Spadi, A., & Reatti, A. (2015). Performances issue’s analysis of an innovative low concentrated solar panel for energy production in buildings. In Energy Procedia (Vol. 81, pp. 22–29). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2015.12.055

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