The obtained results in the 4th stage of the complex project were achieved for all component projects, the indicators being achieved for each activity, in accordance with the work plan adapted to the funding period.

The obtained results by the Component 1 Project focused on a series of experimental impact compression tests of some AlSi10 aluminum foams with unreinforced steel mesh faces (UR) and reinforced sideways, respectively transversely. All investigated samples showed progressive deformation mechanisms. The investigated foams have a brittle matrix at room temperature, which changes into a ductile one as the test temperature rises to 350° C. The results of this stage, regarding the dynamic behavior of the reinforced cellular materials were disseminated in an article in the journal Composites Part A from Q1 with impact factor 6.444. Some of the obtained results for the characterization of sandwich structures were presented in an article published in Materials Today: Proceedings (ISI indexed). Writing an article on the mechanical behavior of ceramic foams, obtained in the component 2 project and tested for compression in the component 1 project is in progress

The current stage of the component 2 Project focused on the outdoor implementation and testing of materials with reduced absorption / reflection of UV-VIS-NIR radiation. The paints with white pigments based on titanium oxide and zinc oxide were obtained in the research laboratories of SC AZUR SA. Materials with potential absorption capacity and photocatalytic degradation of air pollutants, based on titanium dioxide and palladium, were implemented and tested indoor and outdoor. The antimicrobial properties of gold ion-coated materials were also studied. The investigated coatings were deposited cellular glass, a stable material with good compressive strength having a number of advantages, such as water resistance, vapor resistance, pest resistance, etc.

The research from Component 3 Project was focused on 4 directions of action:

• performed modeling and testing by numerical simulation of an electricity distribution network in c.c, at neighborhood level, as a proposal to extend the “smart grid” type networks of c.c.
• integration in the distribution network of some consumers adapted for the supply to direct voltage.
• finalizing the implementation of the monitoring and control system both for the d.c. distribution network and for the physical quantities followed in the analysis of the performances of the implemented facades (temperatures, humidity and CO₂ concentrations).
• performing extensive tests of the equipment put into operation and of the software elements related to the applications.

The activities of the Component 4 Project practically continued the activities from the third stage. Thus, in the first part of stage IV / 2020, the wind turbine and the support structure and the photovoltaic slats were installed in the Experiementarium. For the proper operation of the wind turbine, tests were performed on an experimental micro-grid model with direct current energy distribution integrated in the "smart grid" type system. Monitoring of the experimental data was continued, in order to follow the variations given by the temperature, humidity and CO₂ concentration sensors. Energy production due to the production of photovoltaic panels on the roof was also monitored. Once the energy systems of the wind turbine and the photovoltaic panels are connected, it will be possible to monitor the energy production given by these systems.

In parallel, the monitoring of solar collectors was carried out by the Faculty of Installations Engineering, UTCB. The monitoring was performed based on initial numerical simulations and the realization of an experimental stand.

In order to illustrate the environmental benefit offered by the thermal insulation system obtained from wadding from recycled PET, in this phase an LCA type analysis was performed, comparing the results obtained with the results obtained for a classic mineral wool system, the results indicating the fact that the total impact of the PET_150 insulation system (438.09 kg CO₂eq) is less than the environmental impact of MW_100 (864.86 kg CO₂eq) by approximately 48%.

The main conclusions of Component 4 Project show that in order to build low environmental impact buildings with moderate construction costs, a holistic approach is needed, integrating interdisciplinary analysis and multi-object optimization. The holistic approach to the design of the experimental module involved the adoption of different criteria on sustainable construction, such as resource efficiency, materials efficiency, environmentally conscious design, building life cycle design, use of reusable / recyclable materials, modularity and standardization in design, ecological demolition methods, recycling and reuse of waste, taking into account the cost of construction over the life cycle, the cost of materials, the health and well-being of occupants.