doiSerbia

Geothermal heat potential - the source for heating greenhouses in Southestern Europe

Urbancl Danijela (University of Maribor, Faculty of Chemistry and Chemical Engineering, Maribor, Slovenia)
Trop Peter (University of Maribor, Faculty of Chemistry and Chemical Engineering, Maribor, Slovenia)
Goričanec Darko (University of Maribor, Faculty of Chemistry and Chemical Engineering, Maribor, Slovenia)

The paper presents economically evaluated solutions for heating greenhouses with geothermal potential, if the same greenhouse is placed in two different locations in Southeastern Europe, one in Slovenia and the other in Serbia. The direct geothermal water exploitation using heat exchangers is presented and the remaining heat potential of already used geothermal water is exploited using high temperature heat pumps. Energy demands for heating greenhouses are calculated considering climatic parameters of both locations. Furthermore, different constructions materials are taken into account, and energy demands are evaluated if the same greenhouse is made of 4 mm toughened single glass, double insulated glass or polycarbonate plates. The results show that the geothermal energy usage is economically feasible in both locations, because payback periods are in range from two to almost eight years for different scenarios.

Keywords: geothermal heat exploitation, greenhouses energy demands, high temperature heat pump, economic analysis