Environment and use of ground geothermal energy in Estonia Argo Jõeleht.

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Presentation transcript:

Environment and use of ground geothermal energy in Estonia Argo Jõeleht

Estimated number of installations presently All heat pump systems >30,000 Ground source heat pumps 6500 – 8000 Borehole-based systems 100 – 200

NorthSouth

Example of closed loop system North Estonia near Tallinn Built in 1994 Two wells (150 m and 144 m) One for geothermal purpose, the other one for groundwater

Monitored temperatures on heating seasons 14 – 17

Example of open loop system Oisu village, Central Estonia Built in late 1990s 2 wells (à 10 m) Distance between wells 18 m HP power 22 kW (+18 kW since 2009)

Open system in central Estonia

co-effect of two heat pumps

Summary Geothermal applications are mostly based on horisontal loops Until now it is difficult to get drilling permissions for borehole-based applications There are technology to build ground coupled heat pump systems with minimum risk Situation with borehole-based applications is changing, but still a lot of explaining is needed to increase the knowledge base at all levels

Thank you!