1,720,995 research outputs found
Certificazione energetica degli edifici basata sul metodo asset rating: Principali errori nelle procedure di calcolo
No full textAnalysis of conformity and adaptation of university lecture halls to the illuminating engineering regulations: a case study.
No full textValutazione del microclima luminoso in ambiente scolastico tramite approccio adattivo
No full textQuesto articolo mostra i risultati di una indagine compiuta in ambiente scolastico e basata su un questionario di tipo adattivo,
mirata alla valutazione del microclima luminoso e del grado di soddisfazione dello stesso da parte degli utenti.
Attraverso simulazioni, sono state preventivamente individuate alcune aule all’interno della struttura scolastica, dove le
condizioni potevano risultare critiche, sia per il verificarsi di fenomeni di abbagliamento, che di non rispetto dei valori
consigliati dalla vigente normativa. La metodologia proposta prevede l’utilizzo di rilevamenti strumentali, di simulatori e la
somministrazione di un questionario agli studenti delle aule in oggetto.
Il questionario, basato sul modello adattivo, è stato articolato per il rilevamento di dati strettamente soggettivi (postazione
occupata, visus...) e di dati riguardanti l’ambiente e il rapporto degli utenti con esso (difficoltà nello svolgimento del compito
visivo, frequenza media annuale di utilizzo delle schermature, ecc...).
I risultati del questionario, mappati secondo rappresentazione cromatica sulle postazioni occupate, mostrano elevati gradi di
insoddisfazione, nonostante le misure strumentali abbiano riscontrato valori quantitativamente accettabili. Una ulteriore
simulazione, mostra la possibilità di interventi correttivi, non invasivi, per il controllo della illuminazione naturale, i cui
risultati mostrano un abbassamento quantitativo dei valori ottimali, ma un netto miglioramento qualitativo delle condizioni
luminose microclimatiche. Il processo sviluppato, che vede il confronto e l’integrazione tra metodologia tradizionale e
sperimentale, consente di valutare gli indici di scostamento che, risultano essere elevati per la totalità del tempo di occupazione
delle aule
Asset rating: Disagreement between the results obtained from software for energy certification.
No full textThe general practice for establishing the consumption
in asset ratings of a building consists of entrusting
the energy analysis of the shell of a building to
calculating software.
The building is the subject of an extremely
complicated analysis, and there are many variables at
stake, is it more correct to aim for a simplification of
the problem, in the knowledge that behind every
analytical formula there is the possibility of an
evaluation error, or is it better to aim for calculation
models that are more and more detailed in an attempt
to succeed in predicting the real energy behaviour of
the building ?
Depending on the objective that has been set, it is a
good idea to identify the tool best adapted to reaching
it: it is not correct to use simplified calculation
methods for every analysis, but not correct to apply
dynamic simulation models unconditionally either.
This article shows the different predictive results of
energy performance implemented on a sample
building and obtained using different software and
methods of calculation
Un modello semplificato per la determinazione delle concentrazioni degli inquinanti gassosi emessi da stazioni fisse.
No full textThe energy certification of buidings through the dynamic simulation of variable consumption
No full textThe problem of energy quality control in buildings
was officially recognised for the first time at a
European level in the EEC directive no. 93/76 of
1993. This directive represented the formal act
of an undertaking to promote actions that would
lead to a reduction in global carbon dioxide (CO2)emissions. Article 2 of this directive established that states should carry out programmes concerning the energy certification of buildings, which were consistent in the description of their energy parameters, so as to allow future users of a building to know and understand its energy efficiency.
Italy acknowledged this directive, along with
the subsequent European directive 2002/91/CE on
energy efficiency in the building industry, with the Legislative Decree 192 of 2005
Indice di efficenza energetica: Valutazione delle caratteristiche prestazionali per la certificazione degli edifici attraverso esperienze applicative.
No full textIndice di efficenza energetica: Valutazione delle caratteristiche prestazionali per la certificazione degli edifici attraverso esperienze applicative
Solar cooling: study on the technical-economic feasibility of a plant in a hotel.
No full textSolar air conditioning allows more energy savings than air conventional
conditioning plants. Just like the thermal solar systems for heat production destined
to large consumers, solar air conditioning represents a technology that turns out to
be economically more favorable. Its employment for the summer air conditioning of
buildings represents today an ulterior and very interesting field of application. This
article shows the results of a study on the technical-economic feasibility of a solar
cooling plant realized in a hotel in South Italy. Just like the air conditioning load
produced by electric power, hot water produced by thermal solar plants has a
periodic character which, in both cases, is higher in the summer period. The
coincidence on a yearly base of these two factors makes solar cooling particularly
interesting both from the environmental and economic point of view, involving a
possible future and natural drop of the plant set-up costs. Greater accessibility to the
available technical opportunities and, above all, to the incentives for the necessary
investments could accelerate the development of this remarkably interesting
technology
Methodological evaluation of the environmental impact for aeolian park. The visual perception index.
No full textA Simulation of daylight levels for the determination of visual comfort in large spaces
Get PDFIn sizable environments, such as the collective areas
of a big university building, characterised by very
long corridors, large hallways and broad glazed
surfaces, the daytime illumination factor is often only
excellent near to the latter, due to their
predominantly horizontal, rather than vertical, nature.
His study, which has been carried out thanks to a
simulation software, shows the results of a
correlation between light contributions, come out
from the wide glass surface and those of a big
skylight which cross lenghtways the main part of the
building.
Such results have been compared with some
instrumental measurements considering the shifting
and getting from them important informations on
simulations reliability
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