Search results for "LCA"
showing 10 items of 1995 documents
Task 38 Solar Air-Conditioning and Refrigeration “Life Cycle Assessment of Solar Cooling Systems” A technical report of subtask D Subtask Activity D3
2010
Renewable energy (RE) systems can certainly allow reducing the use of fossil fuels and the related environmental impacts for building air-conditioning. It is more and more clear that good design of the system and appropriateness of the technology are a key issues on the way to maximise the benefits. Therefore, for systems dealing with solar thermal systems, it has been experienced that wrong choices among RE technologies to meet specific applications could also lead to negative effects in terms of Primary Energy (PE) saving.
Coibenti per "cappotto" esterno. Valutazione con metodologia LCA
2010
Il settore dell’edilizia riveste un ruolo chiave per le future strategie europee di sostenibilità, in particolare la necessità di migliorare l’efficienza energetica degli edifici è oggi ampiamente riconosciuta e fa parte degli obiettivi del «20-20-20» posti dall’UE per il 2020. Nel presente studio la metodologia LCA (Life Cycle Assessment) è stata applicata alla scala dell’elemento tecnico nel settore edilizio, con riferimento al contesto siciliano. Inoltre sono stati confrontati i principali impatti associati al ciclo di vita di tre sistemi di coibentazione esterna a “cappotto” con polistirene espanso sinterizzato, lana di roccia e sughero espanso autocollato. L’obiettivo dello studio è qu…
La Life Cycle Assessment applicata all’edificio: metodologia e casi di studio sul sistema fabbricato-impianto
2017
L’edilizia è uno dei settori più rilevanti in termini di produzione di ricchezza e di occupazione, ma è anche responsabile di significativi consumi di risorse naturali e impatti ambientali. Si stima, infatti, che nell’Unione Europea l’edilizia sia responsabile del 50÷60% del consumo di risorse naturali, e tali percentuali sono destinate ad aumentare senza l’avvio di strategie e azioni orientate alla riduzione dei consumi di combustibili fossili e alla promozione delle risorse rinnovabili. Per migliorare l’eco-profilo del settore edile, la riduzione del consumo di risorse e la minimizzazione degli impatti ambientali negli ultimi anni costituiscono gli obiettivi principali da perseguire nella…
Effetti energetico-ambientali di interventi di retrofit su un edificio residenziale monofamiliare in area mediterranea
2017
Gli interventi di retrofit sugli edifici esistenti costituiscono soluzioni tecnologiche fondamentali al fine di ridurre i consumi energetici e gli impatti ambientali degli edifici in fase di uso e di raggiungere condizioni di comfort negli spazi confinati. Per poter raggiungere gli obiettivi fissati dall’Unione Europea relativi alla diminuzione dei consumi di energia del settore civile, occorre individuare quali siano gli edifici che per primi devono essere sottoposti a interventi di retrofit e devono individuare le azioni che intendono promuovere. Questo capitolo rappresenta un utile strumento, per le amministrazioni così come per gli utenti finali, per stimare il risparmio di energia cons…
Report on Life cycle analysis - Task 48 - Activities A2-B3 Final report
2014
This technical report describes the research activities developed within Subtasks A2 “Life cycle analysis at component level” and B3 “Life cycle analysis at system level”. Subtask A2 is focused on developing studies to assess the energy and environmental performances of components of solar cooling and heating (SHC) systems. In detail, the Life Cycle Assessment (LCA) approach applied to SHC systems, started by IEA Task 38, is further developed to give a ready to use collection of datasheets allowing estimating the energy and environmental impacts of different SHC systems during their life cycle. The results of the activities developed within Subtask A2 are used to update and complete a datab…
La lógica del odio
1999
Trench-parallel spreading ridge subduction and its consequences for the geological evolution of the overriding plate: Insights from analogue models a…
2018
A series of 3-D asthenospheric-scale analogue models have been conducted in the laboratory in order to simulate the arrival of a spreading ridge at the trench and understand its effect on plate kinematics, slab geometry, and on the deformation of the overriding plate. These models are made of a two-layered linearly viscous system simulating the lithosphere and asthenosphere. We reproduce the progressive decrease in thickness of the oceanic lithosphere at the trench. We measure plate kinematics, slab geometry and upper plate deformation. Our experiments reveal that the subduction of a thinning plate beneath a freely moving overriding continent favors a decrease of the subduction velocity and…
SISTEMI VERDI COME CULTURA RIGENERATIVA: STRUMENTI E TECNOLOGIE
2021
The study analyzes and proposes in the historical and in the area immediately to it adjacent, the "values-nature" of the buildings through the creation of gardens wall and vertical gardens in the elevatiloy of non-monumental buildings. The study deepens in particular the specificity of the garden roof and the garden vertical, recognizing benefits and critical issues that distinguish these green systems for construction. It also deepens the concept of resilience in close relationship sustainability and regenerative design applied to the built environment. The theme of regenerative design is studied and promoted as an adaptive strategy at the design stage; it requires you to leave nature stre…
Physico-chemical evolution of low-pH cements : influence of the temperature and the retention mechanisme of alkalins
2010
Because of their high alkalinity, Portland cement (OPC)-based materials may have deleterious effects in an underground waste repository. A solution would be to use low-alkalinity cements (also referred as low-pH cements) generating interstitial solutions with a reduced pH (11 instead of 13.5 for OPC), and thus showing an improved chemical compatibility with the repository environment. In this work, the investigated formulations were based on binary (OPC / silica fume) or ternary (OPC / silica fume / slag or fly ash) blends, with high substitution levels of CEM I (from 30% to 80%). This research project met two main objectives: (i) study the chemical evolution of low-pH cements at 50°C or 80…
Luminescent Solar Concentrator (LSC): preliminary phases of the LCA analysis applied to the Smart Window-LSC
2019
Luminescent solar concentrators (LSC) represent one of the innovative technologies related to Building Integrated PhotoVoltaics (BIPV). T hanks to their characteristic of being semi-transparent and of functioning both with direct and diffused radiation, the se devices can be integrated to the surface of the buildings, in particular in replacement of openings such as skylights or windows. They do not require solar tracking systems that are used in classic solar concentrators and allow reducing the presence of silicon compared to traditional photovoltaic panels.