THERMODYNAMIC AND ECONOMIC ANALYSIS OF DIFFERENT FUELS USAGEON EXAMPLE OF RESIDENTIAL BUILDING

Abstract

According to the energy balance for Republic of Serbia for 2017, the total final energy needs for 2017 for Re-public of Serbia are estimated as 8429 Mtoe, with a share of 48% estimated for households, agricultural, public and commercial sectors. In the structure of final energy consumption by fuel for 2017 in Serbia, the renewable energy sources are participating with a share of 12% (only geothermal energy and biomass). In order to provide better under-standing of all important aspects of energy usage, beside the quantitative (energetic) analysis, it is necessary to perform also qualitative (exergetic) analysis, together with the analysis of different fuels usage impact on environment. Fuel costs should take into a consideration the value of usable part, with other words the quality of their energy, namely exergy. The paper presents thermodynamic and economic analysis of different fuels usage, for residential building, with net heated area cca 160 m2, for Belgrade weather data. Results are presented as a comparison between different fuels used for heating and domestic hot water preparation, such as: electricity, natural gas, district heating, coal and renew-able energy sources. The comparison is shown for primary energy consumption, CO2emission, exergy consumption and energy and exergy costs for different fuels.