1,721,047 research outputs found
Valutazione energetico ambientaledi edifici di edilizia pubblica residenziale di diversa tipologia ed ubicazione
No full textThermal analysis of the application of PCM and low emissivity coating in hollow bricks
No full textThis paper discusses the possibility of increasing the energy performance of thermal brick through integration with two different technologies: the first is based on the insertion of phase change material (PCM) inside the enclosures of the bricks, while the second involves covering the internal surface of the enclosures with low emissivity coating. PCM was employed to increase the thermal mass while the low emissivity coating reduces the overall heat transfer coefficient value. To demonstrate the effectiveness of the solutions, energy evaluation was carried out on the bricks using both theoretical and experimental analyses. Stationary and dynamic analyses were performed. The investigations were made in accordance with Italian, European, and international standards: theoretical analyses were based on the finite elements method, while the experimental tests were carried out with the heat flow meter method. Finally, a comparison is made between the theoretical and experimental data and the error is estimate
A comparative life cycle assessment of luminaires for general lighting for the office – compact fluorescent (CFL) vs Light Emitting Diode (LED) – a case study
No full textThe paper presents a life cycle assessment of two lighting technologies based on compact fluorescent (CFL) and Light Emitting Diode (LED) luminaires for the general lighting of the office. The life cycle assessments are carried out considering all the parts of the luminaire: lamp, housing and ballast (or driver for LED). The environmental impact is evaluated considering the whole life cycle of the devices, from manufacturing (including the extraction of raw materials), to use and disposal. An experimental test was conducted to verify the illuminance produced by the two systems. Alternative end-of-life and electricity production scenarios were assessed and compared in order to evaluate possible variations deriving from these changes. The life cycle assessments show that the LED luminaire allows the environmental impacts to be significantly reduced (reduction of 41-50% of greenhouse gas emission and cumulative energy demand), mainly due to high energy efficiency in the use stage. The present paper makes three original contributions: 1) it presents a life cycle assessment (LCA) of a last generation kind of LED and luminaire built for this technology and compares it with a similar CFL luminaire; 2) it presents one of the first LCAs for lighting luminaires made with International Reference Life Cycle Data System (ILCD) 2011 Midpoint; 3) it shows a comparison evaluated with two functional units: 1 lm per 50,000 h and 1 lux per 50,000
Blocchi termici in laterizio: analisi teorico-sperimentale
No full textLa ricerca valuta la possibilità di incrementare le prestazioni termiche dei blocchi di laterizio
per murature attraverso l’uso di soluzioni innovative concentrandosi su due tecnologie, in
seguito brevettate: una per l’incremento della capacità termica attraverso l’inserimento di
PCM (materiali a cambiamento di fase) nelle cavità; l’altra per la riduzione della trasmittanza
termica attraverso il trattamento delle superfici delle cavità con coating a bassa emissivita
Analisi Teorico-sperimentale del comportamento energetico del tetto verde realizzato su un edificio della Regione Marche ad Ancona
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Applicazione di tecniche innovative per il miglioramento delle prestazioni energetiche di laterizi speciiali
No full textRealizzazione di strutture multistrato contenenti Materiali a Cambiamento di Fase (PCM) per la realizzazione di celle frigorifere
No full textI materiali in passaggio di fase (PCM) conferiscono alle strutture leggere inerzia termica per effetto dell'accumulo di calore latente di fusione. Vengono riportati i dati teorico-sperimentali di valutazioni di risparmio energetico effettuate su celle frigorifere per il trasporto su treno di materiali deperibili dotate di materiali in passaggio di fase applicati all'involucro
Sistema di monitoraggio per la valutazione del comportamento energetico di PCM applicato all’edilizia
No full textAnalisi sperimentale dei comportamento energetico di pareti leggere utilizzanti materiali in passaggio di fase per il conferimento di elevata inerzia termica
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