Hellisheiði Geothermal Power PlantThe Hellisheidi geothermal power plant is a flash steam, combined heat and power plant (CHP) located in SW-Iceland, on one of the largest wet geothermal systems (high-enthalpy) in Iceland.  The plant’s purpose is to meet increasing demand for electricity and hot water for space heating.  Development plans call for incremental or phased expansion from 2006 to 2010 to an estimated maximum output of 300 MWe and 400 MWth, making it the largest geothermal combined heat and power plant in Iceland. The plant owner is Reykjavik Energy.

The first phase included two high-pressure 45 MWe turbines that went online in October, 2006 and then one low pressure 33 MWe turbine went online in Fall, 2007.  The most recent expansion phase consisted of two additional 45 MWe turbines that went online in Fall, 2008. The next expansion phase will be the first stage of the thermal power plant scheduled for 2010 and 2 x 45 MWe turbines in 2010.

Hellisheidi Geothermal Power Plant details:

  • Flash steam, combined cycle power plant
  • Planned total output: 300MWe & 400MWth
  • Phase 1:  2 x 45 MWe (90 MW total) went online October, 2006
  • Phase 2:  33 MWe went online Fall, 2007
  • Phase 3:  2 x 45 MWe, went online Fall, 2008
  • Phase 4:  First stage thermal power plant scheduled for 2010
  • Phase 5:  2 x 45 MWe, scheduled for 2010
  • 50 boreholes were drilled, from 1,000-2,200 meters

Mannvit services:

  • Project management
  • Overall plant design
  • Environmental impact assessment
  • Detailed mechanical design of the plant
  • Detailed design of HVAC systems
  • Bid preparation and tender evaluation
  • Site supervision
  • Commissioning
  • Acceptance test
  • Training of operators
  • EIA scoping report
  • Environmental modelling
  • Reservoir engineering



Geothermal Project - Hellisheidi

Additional information:

Árni Magnússon-9518_sv_min

Árni Magnússon

Managing Director
Renewable Energy & Transmission

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Kristinn Ingason

Section Manager of Geothermal Energy

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