The Drilling technology that is currently used for installation of vertical borehole heat exchangers requires capital-intensive equipment that is expensive to mobilize, leads to deteriorated working conditions and requires experienced teams of specialist operatives. Drilling operations also often require significant quantities of drinking quality water and dispose of dirty water and mud. GEOT€CH will employ a different drilling concept that is based on dry auger methods that requires less capital-intensive equipment, enhances safety and avoids the environmental risks, complexity and costs of dealing with water supplies and contaminated waste. Another key concept of GEOT€CH will be a better integration between heat exchange elements during installation by developing an innovative heat exchanger allowing to achieve high levels of thermal performance with low pressure loss. This device employs a co-axial configuration and spiral fluid flow pathways to achieve low thermal resistance compared to conventional U-tube devices. Furthermore, GEOT€CH aims to implement cost-effective geothermal systems by alleviating the costs associated with drilling boreholes in large size buildings. The GEOT€CH’s approach seeks the maximum use of the foundation structures that are otherwise required, exclusively, for structural and geotechnical purposes in tertiary buildings. Foundation structures such as piles, screen walls and basement slabs will become effective geothermal heat exchangers in GEOT€CH. GEOT€CH will develop optimized hybrid solutions that will integrate the different geothermal systems in small and large buildings market. The optimization of geothermal system operation will be achieved with the Energy Management System and the development of a dual source heat pump capable of making optimal use of ground and/or air environmental heat sources. The GEOT€CH’s geothermal heating and cooling standard will be more attractive to design professionals and construction companies.

GEOFIT is an integrated industrially driven action aimed at deployment of cost effective enhanced geothermal systems (EGS) on energy efficient building retrofitting. This entails the development technical development of innovative EGS and its components, namely, non-standard heat exchanger configurations, a novel hybrid heat pump and electrically driven compression heat pump systems and suite of heating and cooling components to be integrated with the novel GSHP concepts, all specially designed to applied in energy efficient retrofitting projects. To make viable the novel EGS in energy efficient building retrofitting, a suite of tools and technologies is developed, including: low invasive risk assessment technologies, site-inspection and worksite building monitoring techniques (SHM), control systems for cost-effective and optimized EGS in operation phase and novel BIM-enabled dedicated tools for management of geothermal based retrofitting works (GEOBIM platform). Furthermore, the project is commited with the application of novel drilling techniques as the improved low invasive vertical drilling and trenchless technologies. GEOFIT brings these technical developments within a new management framework based on Integrated Design and Delivery Solutions for the geothermal based retrofitting process.The IDDS driven process will materialise in the Geo-BIM enabled Retrofitting Management Platform (Geo-BIM tool). By using the 5 demonstration sites as open case studies in 4 countries and climates, featuring different representative technical scenarios/business models, GEOFIT will leverage its key exploitable results, adapted business models and market oriented dissemination for maximizing impact and wide adoption of these novel geothermal technologies and approaches.