The thesis titled Calculation of the heat load of office buildings accordance with EN 12831 presents Pravilnik o učinkoviti rabi energije – PURES that define technical requirements for new in renewed buildings in the field of energy. There are also presented principles of energy facilities and the overview of energy use in buildings. The thesis also includes the description of procedure and calculation of thermal heat load according to the standard EN 12831 in order to check the heat loss of individual areas and the whole building, which is owned by Kostak, d. d. Based on the calculations the thesis includes information on the heat power and the cost of heating with electricity for both office buildings. Furthermore, it includes a description of extracting wood biomass, calculation of the calorific value of wood and overview of the heating cost using biomass. This work also provides a comparison between the costs of heating and CO2 emissions by using two different types of energy sources.
The primary purpose is to present calculation of the amount of electricity required to heat two office buildings and to determine the relevance and adequacy of the quantity of floating debris obtained from the Sava river, for heating with biomass. Using the calculated thermal heat load of the building we acquire data of heat needs to determine the needs for heating. By calculating the calorific value of wood brought to the center, the data is collected, what helps to calculate the required quantity of wood for heating. The thesis also presents an approximate calculation of the reimbursement of investment in case of replacement of the heating system of the electrical energy with biomass.