A Geothermal Plant from a Time-Scale Perspective
| Autor: | Christen Knudby, Erik Gydesen Søgaard, Jacquelin E. Cobos |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Control and Optimization water chemistry Geochemistry Energy Engineering and Power Technology Halide heat production chemistry.chemical_compound Brining Pitting corrosion Water chemistry Sønderborg geothermal plant Time scale Precipitation Electrical and Electronic Engineering Sulfate Engineering (miscellaneous) Geothermal gradient Renewable Energy Sustainability and the Environment business.industry Geothermal energy time scale chemistry Environmental science Carbonate business Heat production Energy (miscellaneous) |
| Zdroj: | Energies, Vol 14, Iss 6096, p 6096 (2021) Cobos Mora, J, Knudby, C & Søgaard, E G 2021, ' A Geothermal Plant from a Time-Scale Perspective ', Energies, vol. 14, no. 19, 6096 . https://doi.org/10.3390/en14196096 Cobos, J E, Knudby, C & Søgaard, E G 2021, ' A geothermal plant from a time-scale perspective ', Energies, vol. 14, no. 19, 6096 . https://doi.org/10.3390/en14196096 Energies; Volume 14; Issue 19; Pages: 6096 |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en14196096 |
| Popis: | In recent years, geothermal energy use from low-temperature sandstone reservoirs has sharply increased. Nonetheless, the injection of heat-depleted geothermal fluids has not been an easy task because of well/formation damage and operational/economic issues. Sønderborg geothermal plant is a case example of heat-mining from a low-temperature reservoir. It is in the northeast of Sønderborg towards Augustenborg Fjord. The present work takes into consideration the regional and local geology of the Sønderborg area, construction of the wells, field experience and water chemistry. The main issues of the geothermal plant appear to be related to the construction of the wells and reinjection of the heat-depleted brine. Our water chemistry analysis and PHREEQC simulations indicate that geothermal brine was saturated with respect to carbonate and barite minerals. The excess of Ca2+ and SO4 2– ions could have led to the formation and precipitation of carbonate and sulfate scales. Moreover, the increment of iron concentration over time could suggest the ingress of oxygen and pitting corrosion due to the presence of halide ions. |
| Databáze: | OpenAIRE |
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