| Summary: | RES Master´s Thesis Verkefnið er unnið í tengslum við Háskóla Íslands og Háskólann á Akureyri Slovakia is among the countries of the European Union which signed the regulation related to renewable energy source utilization. According to European Union statistics from 2005, Slovakia is number 22 in terms of renewable energy usage, with 6.7% of its energy from renewable sources. The regulation states that by the year 2020, Slovakia must increase its usage to 14%, which means doubling the renewable fraction of total energy consumption. Slovakia is one of the countries in central Europe with high geothermal resources occurrence which are not used sufficiently. The disadvantage of these sources is a low temperature. These low temperature sources can be used directly for district heating or to produce electrical power. For low temperature source utilization the most applicable power generation is using small binary power plants - Organic Rankine Cycle (ORC) or Kalina cycle. The aim of this work is to model the ORC and Kalina cycle using data obtained from East Slovakian sources and to compare these two systems in terms of efficiency, power output, usability in Slovakian conditions and financial feasability. The largest source in Eastern Slovakia is located in a placed near Kosice city – Durkov. (Giese, 1998) Results of the modeled thermodynamical comparison show that the Kalina cycle is more feasible in Durkov area conditions. Looking at the basic investments analysis the decision of which modeled power plant is better is a complicated one to make.
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