Nesjavellir geothermal co-generation power plant

Gunnarsson, A.; Steingrímsson, Benedikt; Gunnlaugsson, Einar; Magnússon, J. Rúnar; Maack, Runolfur

doi:10.1016/0375-6505(92)90007-v

Cited by 20 publications

(8 citation statements)

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“…The Hengill volcanoes were found in the late 1960s to have high potential for geothermal energy production (Gunnarsson et al, 1992). The natural geothermal activity is expressed by numerous hot springs and fumaroles spread throughout the area around the three central volcanoes (Figure 1), (Saemundsson, 1995;Arnórsson et al, 2008).…”

Section: The Geothermal System At Hengill Volcano Complexmentioning

confidence: 99%

“…Several geophysical techniques have been applied to study the structure of the Hengill high-temperature area (Bjornsson et al, 1986;Gunnarsson et al, 1992). Within the IGET project, transient electromagnetism (TEM) surveys and 3D magneto-telluric (MT) profiles have been acquired over the area (Árnason et al, 2010).…”

Section: Integrating Velocity and Resistivity Structuresmentioning

confidence: 99%

“…The Nesjavellir Field (Figure 1) supports the first power plant installed in the Hengill area. Based on extensive exploration studies (Gunnarsson et al, 1992), over 20 wells up to 2.5 km in depth have been drilled. Reyjavik Energy operates a 90 MWe power plant and produces 200 MWt of thermal energy for space heating in the Reykjavik area, 27 km away.…”

Section: The Geothermal System At Hengill Volcano Complexmentioning

confidence: 99%

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Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations

et al. 2011

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Section: The Geothermal System At Hengill Volcano Complexmentioning

confidence: 99%

Section: Integrating Velocity and Resistivity Structuresmentioning

confidence: 99%

Section: The Geothermal System At Hengill Volcano Complexmentioning

confidence: 99%

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Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations

et al. 2011

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“…Two power plants operated by Reykjavík Energy are located at Hengill central volcano in southwestern Iceland (Figure 1). Nesjavellir is a co-generation power plant, where fresh water is heated by geothermal steam in heat exchangers (Gunnarsson et al, 1992). The plant began production in 1990, initially providing hot water mainly for district heating in the capital of Reykjavik, but since 1998 has also been generating electricity.…”

Section: Icelandmentioning

confidence: 99%

Characteristics, development and utilization of geothermal resources – a Nordic perspective

Lund¹,

Bjelm²,

Bloomquist³

et al. 2008

Episodes

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Geothermal energy is classified as a renewable energy source and it utilizes the heat generated in the earth primarily from the natural radioactive decay of isotopes of uranium, thorium and potassium. Heat is extracted from the earth to generate geothermal energy via a carrier, usually water occurring either in the liquid or steam phase. In the late 19th century and the early 20th century, the first developments of geothermal resources for power generation and household heating got underway successfully. Many of these geothermal fields are still being utilized today, proving their sustainability. Today geothermal energy is being utilized in more than 72 countries around the world and of the Nordic countries Iceland and Sweden have been in the forefront in each of their respective fields. While geothermal heat pumps are widely used for space heating in Sweden, geothermal energy covers 55% of the primary energy consumption in Iceland where it is used for space heating, power generation and industrial purposes. Future developments aim at expanding the range of viable geothermal resources by improving the capabilities to generate electricity from geothermal resources at temperatures as low as 100°C, as well as developing geothermal resources where water needs to be introduced, so-called hot dry rock resources. But the biggest expansion is expected to continue to be in the installations of geothermal heat pumps.

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“…Although many of these systems have been successfully operated for decades, such as in Iceland, Indonesia, Japan, and New Zealand, the development of potential geothermal resources of this type is geographically restricted to locations with unique geologic characteristics (e.g. volcanic and permeable aquifers) and has a range of aquifer water temperatures ranging from 80 to 150˚C [1][2][3][4][5][6][7]. Capture and use of water/steam from geothermally heated aquifers is not always a renewable resource and most heat reservoirs have a finite lifeexpectancy based on a higher heat harvesting rate vs. the heat flux into the system.…”

Section: Introductionmentioning

confidence: 99%

Geothermal electricity generation and desalination: an integrated process design to conserve latent heat with operational improvements

Missimer

Thuw

et al. 2016

Desalination and Water Treatment

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A new process combination is proposed to link geothermal electricity generation with desalination. The concept involves maximizing the utilization of harvested latent heat by passing the turbine exhaust steam into a multiple effect distillation system and then into an adsorption desalination system. Processes are fully integrated to produce electricity, desalted water for consumer consumption, and make-up water for the geothermal extraction system. Further improvements in operational efficiency are achieved by adding a seawater reverse osmosis system to the site to utilize some of the generated electricity and using on-site aquifer storage and recovery to maximize water production with tailoring of seasonal capacity requirements and to meet facility maintenance requirements. The concept proposed conserves geothermally harvested latent heat and maximizes the economics of geothermal energy development. Development of a fully renewable energy electric generation-desalination-aquifer storage campus is introduced within the framework of geothermal energy development.

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Nesjavellir geothermal co-generation power plant

Cited by 20 publications

References 0 publications

Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations

Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations

Characteristics, development and utilization of geothermal resources – a Nordic perspective

Geothermal electricity generation and desalination: an integrated process design to conserve latent heat with operational improvements

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