| Abstract [eng] |
Population growth, industrial development, and changing habits of the population lead to increasing electricity needs. Although more than half of the European Union's energy needs are still met by energy produced from fossil fuels, the European Union is pursuing the goal of becoming a climateneutral continent by 2050. One of the means to achieve this goal is meeting energy needs from renewable energy sources with energy produced in power plants. The development of renewable energy sources is relevant not only on a large scale, but also at the household level. Power plants of solar and wind renewable energy sources are most often used to meet the energy needs of households. The development of renewable sources in households should be encouraged not only for ecological, but also for economic reasons. However, renewable energy sources for households with small energy needs raise questions about the choice and cost-effectiveness of the right type of renewable electricity. In order to realize the goal of the work - after analyzing the technologies of renewable energy sources, creating a research methodology and performing an economic evaluation of the installation of renewable resources power plants in residential buildings from the aspect of sustainable development - a scientific literature analysis is performed, statistical data is processed, and economic and comparative analyzes are performed. Tasks set to achieve the goal: examine the technologies of renewable energy resources and measures promoting their development, create a research methodology, perform assessments in terms of economic and sustainable development aspects and compare the created models of renewable energy resources. The research methodology consists of five stages, which include: characterization of the object and assessment of its climatic conditions; determination of loads and required electric power of renewable energy resources - 30 kW, 20 kW and 10 kW; simulation of nine different capacities and types (solar, wind and hybrid) of renewable sources power plants, which includes calculations of losses, short circuits, selection and installation of required components and systems; economic evaluation by calculating payback periods, net present values of the project, investment profitability indices, calculation of indicators of the unified energy price and sensitivity analysis performed by reducing the price of electricity and increasing the discount rate; assessment from the aspect of sustainable development and calculation of the amount of CO2 saved (not emitted into the environment) after the installation of renewable sources power plants. |
