The most critical factors in the acceleration of climate and environmental changes are related to industrial development and consequently to an increase in the demand for electricity. Looking for measures that minimize impacts on the environment, alternative energy sources are gaining more and more space in the Brazilian energy matrix. Brazil presents a great solar potential for the generation of electric energy, so the knowledge of solar radiation and its characteristics are fundamental for the study of energy use. Due to the above, this article aims to verify the climatic variability corresponding to the variations in solar radiation patterns, in the face of climate change scenarios. The database used in this research is part of the Phase 5 Intercomparison of Matching Models (CMIP5). It is important, first of all, to determine its availability in order to enable the use of solar radiation as a source of energy in a given location and/or region. The climatic projections, based on the pessimistic scenario, in a 75-year period (2026-2100) showed a fall in solar radiation in all of Rio Grande do Sul, reaching 12% in the eastern region of the state. A concern with the factors that influence the pessimistic perspectives of this scenario, as it may affect a possible production of electric energy from solar radiation.
The increasing popularization of the use of photovoltaic energy and due to its peculiar electrical characteristics, made studies related to the combat and prevention of fires in buildings with photovoltaic solar energy equipment that can subsidize the teams of firefighters/brigadiers essential. An effect of the lack of information on the subject is the development of fear on the part of firefighters / brigadiers when attending a fire in photovoltaic modules, this can generate a certain inertia on the part of these professionals, potentiating human and material damage. It should be noted that due to its relatively recent regulation, and even more recent popularization, the mini and distributed microgeneration lacks specific and current studies and standards that can satisfactorily and safely meet this new trend in energy generation. The present study concluded that until electronic devices are incorporated into the photovoltaic generator that eliminate the risk of electric shock, due to the direct current existing between the modules and the inverter, the firefighters/brigade must use the already existing safe techniques to combat equipment energized.
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