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 2020 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 Orkuveita Reykjavíkur.

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 next 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
Design of control systems

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