Geothermal Power Plants


Mannvit of Iceland is a leader in the engineering and design of geothermal power plants with decades of experience in Iceland and abroad. The Company is currently strategically growing its operations in Europe, the US and South America, applying its expertise to geothermal projects with local developers. The company engineers flash steam and binary geothermal power plants tailored to match specific resource conditions.  Geothermal power plants utilize heat energy from the Earth to generate electricity and can also be designed as combined heat and power (CHP). They are cost effective, reliable and environmentally friendly.

The specific geothermal power plant configurations must match the heat resource to maximize its potential but should also take into account a variety of other criteria including, local conditions and requirements as well as the needs of a community. The geothermal engineers, geoscientists and other company specialists at Mannvit have successfully tackled numerous complex challenges involving geothermal energy utilization all over the world. 

Mannvit Engineering offers comprehensive services in all phases of geothermal energy development including, complete engineering and design of geothermal power plants.

Mannvit services:  

Iceland’s geothermal power plants generally utilize high-enthalpy geothermal resources with temperatures in the excess of 200°C. Iceland’s first geothermal power plant, Bjarnaflag, was commissioned in 1969 and today, total installed electrical generation capacity is 575 MWe. The electricity from these plants provides approximately 22% of the country's electrical needs. The combined heat and power geothermal power plants also contribute substantial amounts of hot water for district heating. 

Mannvit Engineering has provided all geothermal power plants in Iceland with various services through the phases of development, construction and operation. For example, Mannvit lead the development in the flash plants, Nesjavellir and Hellisheidi, and has continued to provide the plants with operational services. Mannvit also lead the second phase of the Krafla Geothermal Power Plant and continues to provide services during its operation.

Mannvit Engineering has also been active in the design of binary power cycles utilizing low-enthalpy resources with temperatures below 200°C. The company has participated in the design of Organic Rankine Cycle (ORC) geothermal power plants in Berlin, El Salvador and the design and maintenance of a Kalina geothermal power plant in Husavik, Iceland. Mannvit Engineering has also  lead and participated in several research projects regarding Kalina technology.

Mannvit's recent geothermal power plant projects in Iceland include:


Geothermal Power Plants

Additional information:

Árni Magnússon-9518_sv_min

Árni Magnússon

Managing Director
Renewable Energy & Transmission

Send email


Kristinn Ingason

Section Manager of Geothermal Energy

Send email