The city of Galanta (pop. 16.500) is situated in the SW part of Slovak Republic, about 50 kms NE from the capital city, Bratislava. Galanta pioneered in the use of renewable energy sources among the countries behind the “Iron Curtain” by developing its own geothermal-based district heating system in the early 1980s. The two production wells (FGG-2 (drilled in 1982) and FGG-3 (in 1984)) - tapping into the reservoir of Upper Pannonian sandstone (similar to the one at Morahalom) at 2101m and 2102m depths respectively - provide the necessary quantity (regulated 20-25 l/s each) of the 78°C geothermal fluid for a whole district of the city, where it is utilised as a heating agent and also for DHW purposes.Read more

Prior to the launch of the project multiple apartment buildings, a hospital, an elderly home, a nursery and an elementary school was connected to the heating system. The current legislative framework in effect doesn’t regulate reinjection, which accounts for the discharge of about 0.5 million m3 of used, still warm and highly mineralised thermal water into the surface waters with all its unfavourable impacts on the environment. Since introducing new policies for a more sustainable management of this natural resource was out of the scope of the GEOCOM project, local activities were focused on actions which could increase the overall efficiency of the existing setup by connecting additional estates (increasing the total heated floor area) to the geothermal loop and by improving the energy efficiency parameters of those buildings which are already benefiting from the service. Within the frame of the project the thermal capacity of the geothermal system was increased by 1239 kW. This investment has triggered the erection of three new municipal housing units (total 101 new apartments) and a few more facilities within the range of the district heating system which are today connected to the loop. The project focused at this demonstration site also on improving the energy efficiency of those estates which are supplied by the geothermal heat. For this reason 3 housing units, a kindergarten and a primary school were selected as subjects for the model retrofitting actions complemented by basic system integration measures.

Geothermal system development

Local real-estate development initiatives in the vicinity of the geothermal source called for a sustainable and green energy supply resulting the partial refurbishment and extension of the 30+ years old district heating system within the frame of our project. The new buildings are provided by geothermal district heating and year around DHW service. By expanding the loop 1955 kW of additional heating energy is delivered to the consumers offsetting approximately 237.000 m3 natural gas consumption and 440t CO2 emissions annually.

By having the new facilities erected proximal to the main heating centre significant saving were realized on the relatively short pipelines keeping the investment costs around 75€/kW, thus ensuring a reasonable return of investment (ROI) period of 10 years. This aspect of the demonstration activities in Galanta yielded an excellent opportunity for the municipality to improve its social housing program by building 3 units of 27 flats each and also boosted some local businesses that chose to be linked up with the district heating system to increase their competitiveness by not being exposed to fluctuating gas prices. 

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