The deep geothermal energy as base-load capable form of energy is an important component of the sustainable energy mix. The source of energy is hot deep groundwater which is used to generate energy. The generation raze depends on pumping rate, temperature and mineral content. However, the hot deep groundwater could also cause problems such as corrosion and scalings. It is important to understand the geothermal system in order to fine-tune it. Through several projects Hydroisotop gained significant experience with respect to analysis, monitoring, and scale inhibitation which allows us to offer a broad portfolio ensuring a smooth system operation e.g.:
- Execution and interpretation of physical-chemical and isotope-hydrological investigations, determination of groundwater age and accompanying gases with regard to a sustainable usage
- Consulting and proposal of concepts for a multiple geothermal usage
- Reservoir analysis for a better risk assessment of operation
- Quality control, long-term monitoring, technical operation control, and risk assessment (for insurance etc.)
- Desaster prevention, technical problem solution, concepts for remedial actions
- Treatment and filtration
- Submission of application according to water regulations and mining laws, etc.
Near-surface geothermal energy plays an important role as a sustainable energy source for heat supply. The following types of usage can be differentiated: ground source heat pumps, geothermal heat collectors, and groundwater wells. The groundwater well is the essential part of the system. Various problems can occur at the contact of groundwater with other parts of the equipment such as: corrosion, scalings, and microbial mucous. Hydrochemical investigation of the groundwater and the evaluation of the water chemistry with regard to the design are the basis for precautionary measures and an uninterrupted operation. For all types of usage the secondary circuit which extracts the groundwater thermal energy by a recuperator is at risk of corrosion but also microbe growth (e.g. legionellae), in particular in the water heating system. Those microbes find optimal living conditions at certain temperatures and can pose a hazard to health. An increase of temperature causes the extinction of the microbes. However, this temperature increase requires a higher energy flux resulting in a performance drop of the heat pump and therefore a reduced efficiency of the device. Alternatively, the problems caused by microbiology can be solved through the use of desinfectant.