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The electricity grid is faced with the problems of insufficient investments, old infrastructure, line losses, low efficiency and energy quality. For this reason, many developed countries have begun to transition to micro and smart grid structures in which generation, consumption and storage are concentrated within a region. In this process, integrating local power generation resources into micro-smart grids will help energy supply. Among renewable energy sources, wind and solar energy are common and have a high application potential. In terms of local application, vertical wind turbines do not require towers, have low maintenance costs, and do not require a rudder system. These advantages increase when it becomes a hybrid system with solar energy. Especially in buildings where consumption is continuous, it is thought that these systems will contribute to the diversity in energy generation, even at a certain rate in the future. In this study, building integrated vertical wind turbine-solar hybrid energy systems (VWTS-HES) were examined, technical and economic analysis of the data was made with the HOMER PRO program in order to determine the most suitable renewable energy hybrid system to meet the electrical load, and suggestions were made in this direction. According to these results, it was concluded that Aktürk VWTSHES installation is the VWTS-HES with the lowest cost and the shortest depreciation period for 7 kW power, which is the monthly average electricity consumption of a family of 4, among the three VWTSHESs examined. In today's conditions, it has been seen that consumers can come together and turn to building-integrated VWTS-HESs so that consumers can contribute to the power system as producing consumers and micro-intelligent grid structures can develop, and VWTS-HES structures can contribute to the diversity of electrical energy generation. [ABSTRACT FROM AUTHOR]

More than 75% of the solar radiation falling on photovoltaic (PV) system is not converted into electricity, but either reflected or converted into thermal energy. This leads to an increase in the PV ceiPs working temperature and consequently, a drop of electricity conversion efficiency. Hybrid conversion of solar radiation implies simultaneous solar radiation conversion into thermal and electrical energy in the photovoltaic/thermal (PV/T) collector. A PV/T system consist a PV panel placed on a flat plate thermal collector, with a gap between them to achieve an effective photovoltaic cooling. In this study, energy and exergy efficiency of PV system and PV/T collector according to First and Second Laws of Thermodynamics, respectively, and also new thermodynamic parameter such as improving potential and sustainability index of these solar energy conversations have been derived. In order to appreciate the model, numerical calculations have been made for evaluating these systems performance corresponding to typical climate of Isparta, Turkey. The investigation uses life cycle assessment (LCA), which is an analytical tool to identify and quantify environmentally critical phases during the life cycle of a system or a product and/or to evaluate and decrease the overall environmental impact of the system or product. The LCA results for the solar energy conversation systems indicate that the PV/T collector has lower environmental impacts than the PV system because it uses low temperature thermal energy. [ABSTRACT FROM AUTHOR]