case studies from slovenia the geothermal heat pumps market in central & eastern europe evgen...
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Case studies from Slovenia
‘The Geothermal Heat Pumps market in Central & Eastern Europe’
Evgen TorhačProject manager
Bratislava, 12.11.2007
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Introduction
• Nafta Geoterm profile• Current status in Slovenia• Lendava geothermal city – project example• HTH pump• Future development
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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
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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!
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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!
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Current situation in Slovenia HEALTH RESORTS
AND RECREATION CENTERS (24 loc. – 17,6 MWt)
INDUSTRIAL APPLICATIONS:• GREENHOUSES (12,7
MWt)• OTHER (1 MWt)
DISTRICT HEATING SYSTEMS(4 loc. – 7 MWt)
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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
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Surface heat conduction system
PRIMARY CIRCUIT:
PIPELINE DIAMETER150 mm
PIPELINE LENGTH2000 m
SECONDARY CIRCUIT:
PIPELINE DIAMETER150 m
PIPELINE LENGTH1200 m
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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
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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!
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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
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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!
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Future projects
High temperature waterfor electricity production
EXPLORE ! DEPLOY !
DEVELOP !Bubble-3Well
Geothermalcommunity
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THANKS FOR YOUR ATTENTION!
Evgen Torhač[email protected]
Nafta - Geoterm, d. o. o.Mlinska ulica 59220 LendavaT: + 386 (0)2 57 72 240F: +386 (02) 57 72 388E: [email protected]: www.nafta-geoterm.si