Iceland’s Hellisheidi CHP power plant, located on the outskirts of Reykjavik, added 90 MW of power at the start of October, making it now one of the world’s largest geothermal plants.

The plant, which is owned by Reykjavik’s utility company Orkuveita Reykjavikur, now produces 303 MW of power and 133 MW of thermal energy for space heating and hot water. Around 50 geothermal wells support the entire production

The latest expansion added two 45 MW Mitsubishi turbines at a cost of around US$197 million.

Further development plans for the Hellisheidi CHP geothermal plant include two more heating plant phases of 133 MWth each, and will help to meet the growing demand for space heating and hot water in Iceland.

When complete, these additional units will bring the heating capacity of the plant to 400 MW.

The Hellisheidi plant was designed by a group of consulting firms led by Mannvit, an Icelandic geothermal and hydro specialist.

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