Presentation is loading. Please wait.

Presentation is loading. Please wait.

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

Similar presentations


Presentation on theme: "Environment and use of ground geothermal energy in Estonia Argo Jõeleht."— Presentation transcript:

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

2

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

4 0 200 -200 -400 -600 NorthSouth

5 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

6 Monitored temperatures on heating seasons 14 – 17

7 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)

8 Open system in central Estonia

9 co-effect of two heat pumps

10 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

11 Thank you!

12


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

Similar presentations


Ads by Google