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INNOVATIVE CASCADED USE OF LOW TEMPERATURE GEOTHERMAL ENERGY IN INDUSTRY, HEATING & ELECTRICITY PRODUCTION

Objectif

Demonstrate the technical feasibility of transporting about 130°C hot geothermal water under pressure over a 18 km distance in a buried insulated carbon steel pipe. Moreover to illustrate that its use for combined space heating, industrial use and electrical power production is possible within commercially acceptable economic viability criteria. Furthermore to demonstrate the technical and economic feasibility of increasing and diversifying the utilisation of the ample geothermal energy resources available within a 30 km radius from the town of Húsavik.
To manifest that the following environmental benefits are achievable :
- a significant reduction in deleterious atmospheric emissions through replacement of fossil fuel;
- geothermal energy can be economically transported to a suitable location close to the end user; and
- substantially improved utilisation of the extracted energy via the conversion of primary energy in cascade.
To disclose the viability of improving and strengthening existing commercial and industrial activity in the Húsavik community, and attracting new industry, by means of a progressive energy policy sensitive to modern environmental demands.
To establish if the availability of low-cost energy, provides the right incentives for higher industrial productivity and output, thus creating new employment opportunities and greater job vissicitude.

Geothermal water will be transmitted through a new 17.5 km long, buried pre-insulated carbon steel pipeline to an Energy Integration Centre (EIC) located close to the new industrial site under construction in Húsavik. The water temperature at the EIC is approx. 124°C. In the EIC it is proposed to convert the thermal energy in a binary cycle power plant and produce 1.5 MW electricity in cascade and/or parallel with industrial applications such as wood drying, etc. A new factory currently using 85°C hot water for the drying of hardwood is located at the new industrial site and plans to start the production of hardwood veneer using geothermal water. Several other innovative industrial applications are under consideration; both processes that can use 80°C hot water and others that require steam or water at temperature above 100°C.
The 75-80°C return-water from the binary power plant and the industrial applications will be mixed with the water from the hot springs for re-use and piped to a storage tank. Thence it is piped to the Húsavik District Heating System. The storage tank temperature will be held at 80°C via injecting 124°C water. From the heating system much of the spent water is disposed of into the town's sewage system at about 35°C. A portion of the effluent water will be utilised down to 15°C to 20°C for snow melting. The Hveravellir geothermal field is located at an elevation of 140 m.a.s.l. A storage tank will be erected at 80 m.a.s.l. The tank ensures sufficient gravitational head to maintain an appropriate rate of flow through the entire system. No pumps are thus needed. The 124°C hot water will be piped to the town's harbour area there to be used for various food processing applications and to replace a boiler burning fossil fuel.

Appel à propositions

Data not available

Régime de financement

DEM - Demonstration contracts

Coordinateur

ORKUVEITA HÚSAVIKUR
Contribution de l’UE
Aucune donnée
Adresse
KETILSBRAUT 9
640 HÚSAVIK
Islande

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Coût total
Aucune donnée