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Case studies from Slovenia

Case studies from Slovenia. ‘The Geothermal Heat Pumps market in Central & Eastern Europe’. Evgen Torhač Project manager. Bratislava, 12.11.2007. Introduction. Nafta Geoterm profile Current status in Slovenia Lendava geothermal city – project example HTH pump Future development.

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Case studies from Slovenia

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

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

  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-eastern Slovenia rich with geothermal energy potential • A key player for the further development of geothermal field in this part of central & eastern Europe

  4. NG strategic activities • Increasing the proportion of production and use of environment-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 exploration and its utilization • The future built on • Exploring • Developing • Deploying • Bringing clean energy to your house!

  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) • Utilization not optimal with regards to the potential available! Source: Proceedings World Geothermal Congress 2005

  6. Current situation in Slovenia • HEALTH RESORTS • ANDRECREATION CENTERS • (24 loc. – 17,6 MWt) • INDUSTRIAL APPLICATIONS: • GREENHOUSES (12,7 MWt) • OTHER (1 MWt) • DISTRICT HEATING SYSTEMS • (4 loc. – 7 MWt)

  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. 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. Facts and figures • Fully automated system • Thermomineral water temperature: 67ºC • Flow rate: 90 m3/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. 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. 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. 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. Future projects • High temperature water • for electricity production EXPLORE ! DEPLOY ! • Geothermal • community DEVELOP ! • Bubble-3Well

  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

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