1,721,113 research outputs found
Thermal and mechanical characterization of panels made by cement mortar and sheep's wool fibres
No full textGreen building and environmental sustainability are two important concepts for technicians and engineers. Among natural materials, usually considered as waste, sheep wool plays a fundamental role. This paper is intended to learn more about the potential of these fibres inserted in cement mortar panels, investigating both the insulation properties and mechanical strength, trying to achieve an optimal compromise between these two aspects. Therefore, in the laboratory of materials ENEA Research Centre Trisaia, several panels with different percentages of sheep wool were manufactured, tested and characterized according to technical standards. © 2017 The Authors
Mechanical and phisical qualification of basalt fiber panels
No full textThis paper summarizes the experimental work carried out at the Material technologies Laboratory of the ENEA Trisaia Research Centre (UTTRI-TEM) for the energy performance characterization of basalt fiber panels with different thicknesses. In particular, the determination of the thermal conductivity with the heat flow meter methods, (in accordance with UNI EN 12667:2002), the determination of the physical characteristics of the material, such as compressive strength (in accordance with UNI EN 826:2013), the absorption of water in the short term (according to standard EN 1609). The final data may be used for a comparative evaluation of basalt fiber with traditional insulating materials and will be the basis for a future development of new panel, based on basalt fiber, able to guarantee thermal conductivity values lower than those existing with substantially contained economic costs
Piccola permanente in rapporto con fratture dentarie radicolari dopo trattamento
No full textSi prendono in esame le possibilità di trattamento chirurgico-conservativo delle fratture dentarie radicolari.
In base al tipo di lesione e ai risultati della terapia praticata si svolgono alcune considerazioni sulla valutazione del danno ai fini della piccola permanente
Numerical and experimental computation of airflow in a transport container
No full textThe aim of this work is to perform a numerical and experimental analysis of convective flows inside an intermodal container refrigerated in hybrid mode, active by compressor and passive by eutectic plates, in the course of a simulated trip, in order to verify the distribution uniformity of the cold. This report shows the numerical simulation model implemented thanks to the use of Comsol Multiphysics 4.3b, a scientific commercial software CFD (Computational Fluid Dynamics) that allows thermofluidodynamic simulations. Two operation modes were considered in the model, one in laminar flow to reproduce the OFF cycle of the compressor with the only action of the eutectic plates, the other one in turbulent flow to reproduce the ON cycle of the compressor. In the second case, the k-ε model was used as a model of turbulence RANS (Reynolds Averaged Navier Stokes). The results of this numerical analysis were compared with experimental data acquired during the simulated trip to validate the implemented model
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