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Reykjavík, Iceland

Mortensen A.K.,ISOR | Egilson T.,ISOR | Gautason B.,ISOR | Arnadottir S.,ISOR | Guomundsson A.,Landsvirkjun
Geothermics | Year: 2014

The stratigraphy, alteration mineralogy and temperature conditions in well IDDP-1 were established through drill cutting analyses and geophysical logs. The stratigraphy comprises basaltic lava and hyaloclastite sequences extending to 1362. m succeeded by an intrusive complex. Intrusions comprise basaltic dykes, dolerites and below 2020. m, granophyre and felsites. Rhyolitic magma was intersected below 2100. m. Alteration reflects cooling in the upper ~1500. m of the reservoir. Below 1600. m temperature follows the boiling-point-depth curve. Alteration minerals are scarce in vicinity to the feed zone at 2035-2080. m correlating with a superheated steam zone above the magma, but estimated bottom-hole temperature is ~500. °C. © 2013. Source


Ingason K.,Mannvit | Kristjansson V.,Mannvit | Einarsson K.,Landsvirkjun
Geothermics | Year: 2014

The initial discharge of IDDP-1 took place in March 2010 and the well was discharged intermittently until July 2012. In the beginning a mixture of steam and water flowed from the well but soon the fluid became superheated and enthalpy gradually increased, approaching 3200. kJ/kg. The flow rate from the well was up to 50. kg/s. The design condition at well head turned out to be challenging due to high pressure, temperature, corrosion and erosion. Valves, rated for higher pressure and temperature, failed during operation. Five different designs of discharge systems were installed. The well had to be quenched when the master valves failed. Plans for its future are still being evaluated. © 2013 Elsevier Ltd. Source


Helseth A.,Sintef | Gjelsvik A.,Sintef | Mo B.,Sintef | Linnet U.,Landsvirkjun
IET Generation, Transmission and Distribution | Year: 2013

This study describes a model for optimal scheduling of hydro thermal systems with multiple hydro reservoirs. Inflow to hydropower reservoirs, wind power and exogenously given prices are treated as stochastic variables. Power flow constraints are included through a linearised power flow model. A linearised representation of start-up costs for generating units and pumps is provided. The model is well suited for medium- and long-term hydro thermal generation scheduling and has the capability of capturing detailed system constraints by using a fine time resolution. The presented model is tested on a realistic representation of the Icelandic power system, considering some potential future system extensions. © The Institution of Engineering and Technology 2013. Source


News Article | December 15, 2015
Site: http://www.renewableenergyworld.com

The Japan Bank for International Cooperation, known as JBIC, will provide an export loan of as much as $34 million for a 90-megawatt geothermal power project by Landsvirkjun in Iceland.


Hauksson T.,Kemia | Markusson S.,Landsvirkjun | Einarsson K.,Landsvirkjun | Karlsdottir S.N.,Nyskopunarmiostoo Islands | And 3 more authors.
Geothermics | Year: 2014

Material tests and scrubbing experiments were carried out at the IDDP-1 well in the Krafla geothermal field in Iceland. The 450. °C superheated steam contained acid gas (approx. 90. mg/kg HCl and 7. mg/kg HF) and was highly corrosive when it condensed making it unsuitable for utilization without scrubbing. The acid gas could effectively be scrubbed from the steam with water. The steam contained gasous sulfur compond (80-100. mg/kg. S), which could only be scrubbed from the steam with alkaline water. The steam contained both silica dust and dissolved silica which was effectively washed from the steam with wet scrubbing. Experiments on corrosion and erosion resistance of metals and alloys were problematic to run because of equipment clogging by silica dust. © 2013 Elsevier Ltd. Source

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