THE USE OF GEOTHERMAL ENERGY IN ORGANIC RANKINE CYCLE

Abstract

In this paper it is considered the possibility of using geothermal energy in the territory of Republic Serbia in the systems that run an organic Rankine cycle (ORC) with R245fa as the working fluid. Although the most common geothermal resources that can be encountered in the territory of RS is moderate water temperature, geothermal water from the locality Vranjska Banja with a highest temperature of 96°C was adopted as a heat source for driving this system. This system was compared with the conventional system for electricity production of the same power (Rankine cycle with water as the working fluid and coal–fired boiler), in order to calculate the annually reduction in CO2 emission into the atmosphere from the burning of conventional fuel, as well as the savings in its consumption.