The results obtained in the second stage of the complex project were achieved in all component projects, the indicators being confirmed for each activity. 

In the framework of Project 1 a program for designing, sizing and verification of sandwich panels was developed. Tests on samples cut from sandwich panels allowed to determine the shear strength of the core, and the tensile strength of the sandwich faces, respectively.  The transverse modulus of elasticity of the core was determined in four point bending tests of the sandwiches and the elasticity modulus were determined using the transverse tensile test respectively.

The experimental results also confirmed the predictions based on the failure diagrams of sandwich beams with aluminum outer skins and polyurethane foam core, that indicated the wrinkling of the face as failure behavior. Fatigue tests (similar to wind loads) have shown that the higher fatigue strength was obtained for the lower density foam core (145 kg/m3).

The dynamic fracture toughness increases with increasing density, the obtained values are 2.5 times higher than the static fracture toughness.

The analyzes of the component project 2 were focused on widening the applicative potential of cellular materials by functionalizing them with substances having photocatalytic properties in order to degrade some pollutants. TiO2 and WO3, two photocatalysts active in the ultraviolet, respectively visible field, were used. The activated materials were subjected to photocatalytic studies and their ability to degrade pollutants under the action of simulated solar radiation was evaluated. Two dyes were selected as degradation reference substances: Rhodamine B (RhB) and Methylene Blue (MB). Activation of cellular glass support was achieved in two ways: by surface and by volume deposition. Cellular glass was obtained by the usage of common glass wastes as a base material and CaCO3 waste as porogen agent. The activated material characterization was performed using the following analysis techniques: Raman spectroscopy, FT-IR, EDAX, X-ray diffraction, thermogravimetric analysis, scan microscopy, confocal 3D laser scanning microscopy.

Project 3. Management of energy conversion and storage using "smart grid" technologies.
Smart grid technologies ("smart grid", "microgrid" etc.) are implemented today at different levels, being able to integrate energy systems from high values of installed powers, up to the level of a residential neighborhood, or even individual homes.
The development of power electronics assisted by high-performance control systems has made possible the implementation of this technology, which, in addition to energy transfer, also needs a transfer of information between components.
Energy storage media are absolutely necessary elements in the composition of "smart grid" systems. Most of these components operate in DC rechargeable batteries, including plug-in electric vehicles, supercapacitors). In addition, most of household consumers (lighting, “info-gagets”, household appliances) use electricity in DC, having rectifiers connected to the AC network. These are nonlinear elements, generating a deforming regime, with negative influences on energy quality. If we also take into account the fact that the photovoltaic energy conversion elements and the electric generators attached to the small wind turbines provide electricity in DC, we can conclude that the distribution systems can be made from the beginning based on DC buses.
The proposed project topic has as objectives the theoretical and experimental study, regarding the implementation of DC energy distribution, in the residential environment, in off-grid regimes, having as inputs wind and photovoltaic energy conversion systems and as outputs DC loads.
The entire system will be monitored through a dedicated SCADA application.

The activities of the Component Project 4 were focused on three main directions:

• construction of the modular laboratory EXPERIMENTARIUM, realization of the metallic structure execution project, the contracting of an execution company and the realization of the resistance structure. On the other hand, during 2019, the Urbanism Certificate and the approvals of the various public entities were obtained. The research team is currently awaiting the Building Permit.
• design of facade systems. The studies were focused on the construction and efficient operation of solar collectors with perforated absorbent plate, in order to integrate them into the facades of buildings. Based on the obtained results (both experimental and numerical) a glazed solar collector prototype with perforated absorbent plate can be recommended to be tested in real operating conditions by integrating it into building facades. The proposed configuration aims towards integrating phase change materials in the construction of the solar collector in order to increase its performance;
• experimental tests on fast foundations. Based on a geotechnical study conducted in phase 1 of the project, the study included three tests characteristic of geotechnics, an experimental plate test to determine the deformation modulus of the site and two experimental tests on pyramid trunk foundations that have allowed the evaluation of the load-bearing capacity and compaction of this foundation type. The studies are complemented by ongoing parametric numerical simulations.