We’re thrilled to share a major milestone our project: the installation of GeothermSkin, an innovative geothermal technology, in the new building under construction at the Ex-Zuffo parking lot in Trento, Italy. This cutting-edge system, developed by project partner Politecnico di Torino, leverages the thermal activation of the foundation slab and walls.

The innovation behind the adoption of energy geostructures aims to support the creation of a Positive Energy Building (PEB) in the Ex-Zuffo area, which will serve as a multifunctional hub for the City of Trento after the work completion. These energy geostructures combine two functions in a single concrete element: structural support and energy supply. This is achieved by embedding a circuit of pipes within the structure, which exchanges heat with the surrounding ground.

Two specific technical solutions were combined in the basement of the new building:

1. Thermal activation of the foundation: achieved by installing a network of pipes within the foundation slab
2. Thermal activation of retaining walls: using GeothermSkin elements, which act as shallow energy walls

GeothermSkin is designed to transform the underground portions of buildings into geothermal collectors for heating and cooling. It functions as a hydraulic circuit embedded on the external earth-contact surfaces of buildings, applied much like a “skin.” This system can be integrated into both new constructions and renovated buildings, making it highly versatile.

The key objective of this innovation is to fully or partially meet a building’s renewable energy requirements. This is especially advantageous in dense urban areas, where land scarcity and the prevalence of existing buildings limit options for renewable energy systems that require horizontal space.

Installation Process
The system is installed after structural works are completed.
 For new constructions: GeothermSkin is deployed immediately after formworks are removed and before the ground is backfilled.
 For existing buildings: excavation is required to expose the exterior wall surface. The system is then installed and subsequently buried during backfilling.

System Components

The system is composed of modular panels, each up to 2.50 meters wide. These panels form a network of polymeric pipes made from crosslinked polyethylene (PE-Xa) or high-density polyethylene (PE-D), which constitute the hydraulic circuit.

Energy and Sustainability Benefits

GeothermSkin significantly contributes to clean energy production in both new and refurbished buildings. It can also be combined with other renewable energy technologies, such as solar thermal panels, to create entirely self-sustaining housing. Optimal results can be achieved when the system’s electricity needs are powered by renewable sources like photovoltaic panels or micro-wind generators.

This innovative approach offers a sustainable and space-efficient solution for urban areas, paving the way for greener and more energy-efficient buildings.