GEOTHERMAL STRUCTURES TYPES STUDIED AND DONE BY TERMOLINE :
I. GEOTHERMAL PROBES – are the most used geothermal systems – the primary source of ground to water heat pumps. They drill at depths of 50-200 m and geothermal wells (PEHA or PE-Xa pipe diameter 32-40 mm) are inserted into the drilling. Geothermal probes provide thermal transfer with closed loop soil through which ethylene glycol circulates with a freezing temperature down to -15 ° C.
Mounting of geothermal probes in the drilling
Work in progress – UPU – Emergency Department Hospital Oradea: Heat pumps with 320 energy piles
House – heated and cooled with 10 energy piles
Beam founding and collecting pipes from geothermal piles
III. DIAPHRAGM GEOTHERMAL WALLS (SLURRY WALLS) –
– the diaphragm walls are designed with a structural design to protect the construction of a building by stabilizing the adjacent terrain. If the PEHA or PE-Xa pipe diameter 16-32 mm is mounted in the diaphragm walls, they become geothermal structures – the primary circuit of the brine to water heat pumps and the heat exchanger with the soil that reaches the storage medium. These geothermal structures will be used to operate the heat pumps that provide heating – cooling of the building for which they were designed.
Heat pumps on slurry walls – Oromolu Building / Piata Victoriei Bucharest
IV. TUNNELS – like the diaphragm walls, if in the tunnel walls (underground trains, underground passages, …), PEHA or PE-Xa pipe diameter of 16-32 mm is mounted on the reinforcement, they become geothermal structures – primary circuit of the brine to water heat pumps and heat exchanger with the soil. These geothermal structures will be used to operate heat pumps that provide heating – cooling of neighboring buildings, train stations, ….
GEOTHERMAL STRUCTURES – AN INNOVATIVE TECHNOLOGY
- Geothermal energy obtained from geothermal structures is an ecological technology, a solution for heating and cooling buildings with a significant reduction in CO₂ emissions and other greenhouse gas emissions;
- Ensure energy efficiency at the building level at the neighborhood / hour level, responding to the concept of sustainable city / town;
- It is complementary to any other renewable energy system being a local source of renewable energy (the natural heat present in the earth);
- No additional drilling is required, but minor changes in the design of the foundation and additional minimum installation costs;
- The use of geothermal structures ensures localization of the surrounding area that can be used for further expansions;
- The concept of geothermal energy can be adapted to spatial urban planning for cities of different sizes, with a different population density;
- Energy pilots form a large thermal battery (similar to night-storage heaters): they heat the soil during the summer to improve winter heating and cooling during the winter to increase cooling during the summer period by providing a storage system the energy otherwise difficult to achieve;
- Design of energy geostructures should be integrated into the design of conventional geotechnical structures through multidisciplinary real collaboration in all phases of the project. Geothermal analysis should be treated simultaneously with geotechnical issues in interaction with energy demand assessment. In the process, system interfaces must be handled with care.