1. Case studies from Slovenia The Geothermal Heat Pumps market in Central & Eastern Europe Evgen Torhač Project manager Bratislava, 12.11.2007

2. 10.6.2014 2 Introduction Nafta Geoterm profile Current status in Slovenia Lendava geothermal city – project example HTH pump Future development

3. 10.6.2014 3 Nafta Geoterm (NG) Profile NG is a daughter company of Nafta Lendava, with extensive experience in exploration of underground resources since 1945; Located in north-east ern Slovenia rich with geothermal energy potential A key player for the further development of geothermal field in this part of central & eastern Europe

4. 10.6.2014 4 NG strategic activities Increasing the proportion of production and use of envir on ment-friendly geothermal energy with: –direct use of geothermal water and –increasing the efficiency with Heat Pumps Providing Turn-key solutions on the field of geothermal energy exploratio n and its utilization The future built on –Exploring –Developing –Deploying Bringing clean energy to your house!

5. 10.6.2014 5 Development in Slovenia A lot of potential for direct use, especially north- eastern part of Slovenia – 45 MWt installed at 27 locations GSHP installed – 2,33 MWt GHP installed – 3,94 MWt Geothermal system utilization increased substantially in last three years (no official data available yet) Source: Proceedings World Geothermal Congress 2005 Utilization not optimal with regards to the potential available!

6. 10.6.2014 6 Current situation in Slovenia HEALTH RESORTS AND RECREATION CENTERS (24 loc. – 1 7,6 MWt) INDUSTRIAL APPLICATIONS: GREENHOUSES (12,7 MWt) OTHER (1 MWt) DISTRICT HEATING SYSTEMS (4 loc. – 7 MWt)

7. 10.6.2014 7 Lendava Geothermal city Production geothermal well Le-2g Geothermal - gas boiler house Surface heat conducting system Injection geothermal well Le-3g Surface injection system Monitoring system

8. 10.6.2014 8 Surface heat conduction system PRIMARY CIRCUIT: PIPELINE DIAMETER 150 mm PIPELINE LENGTH 2000 m SECONDARY CIRCUIT: PIPELINE DIAMETER 150 m PIPELINE LENGTH 1200 m

9. 10.6.2014 9 Facts and figures Fully automated system Thermomineral water temperature: 67ºC Flow rate: 90 m 3 /h Heat exchangers: 1x 2,70 MWt 1x 0,45 MWt 1x 0,17 MWt Gas boilers for backup & peak loads: 2 x 1,320 MWt Price of geothermal energy lower than conventional

10. 10.6.2014 10 Unexploited potential System based on district heating with high peak loads Energy potential not used in summer periods Wasted water temperature: up to 40ºC With the use of special high temperature GHP the installed power could be doubled! OPTIMIZATION NEEDED!

11. 10.6.2014 11 HTH pump project EUREKA project Goal: to develop a high power (over 250kW) high temperature (up to 80ºC) GHP for exploitation of low temperature (up to 40ºC) geothermal sources Increasing the overall efficiency of geothermal systems Enable faster deployment of applications like (district heating, greenhouses, …) Development of geothermal systems in the areas with lower gradient

12. 10.6.2014 12 HTH pump project Input temperature: up to 40ºC High COP Output temperature: up to 80ºC Additional 2,5 MW in geothermal city Lendava Very high utilitzation potential COOPERATION ON THE PROJECT POSSIBLE AND PREFFERABLE!

13. 10.6.2014 13 Future projects High temperature water for electricity production EXPLORE ! DEPLOY ! DEVELOP ! Bubble-3Well Geothermal community

14. 10.6.2014 14 THANKS FOR YOUR ATTENTION! Evgen Torhač evgen.torhac@nafta-geoterm.si Nafta - Geoterm, d. o. o. Mlinska ulica 5 9220 Lendava T: + 386 (0)2 57 72 240 F: +386 (02) 57 72 388 E: info@nafta-geoterm.si I: www.nafta-geoterm.si