| Abstract [eng] |
Heat and electricity consumption in buildings brings an essential contribution to greenhouse gas emissions. European Union energy consumption in buildings accounted for 36 percent. By 2020, Lithuania has committed itself to the total energy production in the balance sheet to produce at least 23 percent. energy from renewable sources. The aim of the work is to evaluate the energy produced from renewable energy sources usability from the Kaunas University of Technology buildings and justified renewable energy production equipment choice from environmentally and economically viewpoints. Work carried out in the scientific literature analysis, primary and secondary statistical data analysis and processing, and renewable energy technologies in the building at feasibility analysis, the simulation with the computer program \"RETScreen\" methods. The use of renewable energy to ensure the building's energy needs was evaluated from a theoretical perspective. Analyzed the Kaunas University of Technology's I-th, IX-th and XI-th palace building's energy needs prognosis until 2026 and evaluated the possibility of energy supply from renewable energy sources in these buildings. Thermal energy needs until 2026 for XI-th palace should reach 1 321 MWh, and electricity – 1 338 MWh per year. Been modeled combined heat-power generation system which is using solar photovoltaic modules and heat pumps. This system is economically and environmentally most advantageous because it would compensate for 52 percent of the building's energy needs. Thermal energy needs would be compensate for 99 percent. and the electrical energy needs – 11 percent. The equipment payback time up to 5.3 years. The release of greenhouse gas emissions would be reduced from 887.99 to 389.79 tons per year. |
