Search results for "indoor"
showing 10 items of 219 documents
SISTEMI PASSIVI PER L’INDOOR COMFORT: LA GESTIONE DELLE SERRE SOLARI IN REGIME ESTIVO
2019
La radiazione solare costituisce una fonte inesauribile di energia. Negli ultimi anni il mercato edilizio è stato invaso dall’applicazione di sistemi attivi (pannelli solari, etc...), non considerando le più valide alternative passive per il risparmio energetico. Oggi le mutate esigenze connesse all’evoluzione del concetto stesso di benessere ambientale richiedono una nuova coniugazione delle esperienze della tradizione costruttiva con le complessità dell’organizzazione tecnologica e i bisogni dell’utenza. La serra solare è un elemento architettonico complesso che consente un condizionamento sia invernale che estivo. Progettare sistemi passivi vetrati integrati con l’involucro permette al c…
Bio-based Materials. Standardizzazione e processi per la commercializzazione
2021
Il contributo si occupa degli aspetti normativi nel campo della produzione e uso di una malta con componenti organici derivanti dal riciclo di scarti agricoli e silvo-pastorali. Viene prestata attenzione alla normativa internazionale più diffusa e nota, a quella europea e a quella italiana. La riduzione del consumo di suolo e di risorse lapidee, degli scarti, la limitazione dell’utilizzo di materiali di cava naturali sono solo alcuni benefici che hanno indotto la comunità scientifica a investire nell’uso di materie prime-seconde di origine vegetale, ecosostenibili; oggi, lo stato dell’arte è molto ricco. Tuttavia, non ci sono ancora normative tecniche e procedurali relative ai materiali che…
La ricerca del comfort nelle abitazioni della tradizione siciliana
2014
Traditional buildings give us many examples of sustainable interventions justified by the demand of comfort and inexpensiveness in the choice of materials and constructive techniques. It was always searched ideal solution to the problems bound at the territory such as, in Sicily, the high summer temperature or the capillary ascent due to the ground nature and often emphasized by the building stone nature. The search for the solutions to such problems has undergone a slow and constant evolution in the centuries, drawing starting points from the nature, from the other people, from the surrounding context. Solutions traditionally adopted can supply a useful example to be studied for a sustaina…
Assessment of indoor illuminance and study on best photosensors' position for design and commissioning of Daylight Linked Control Systems. A new meth…
2018
Abstract Artificial lighting systems have to ensure appropriate illuminance with high energy efficiency according to best design practice and technical standards. These aims can be tackled, by incorporating a Daylight linked control system. However, the system behaviour is strongly influenced by several factors and, in particular, by the sensors' position. Indeed, very often the illuminance on work-plane is not fully correlated with illuminance measured by the photo-sensor used to control the luminaires. This fact leads to wrong information for the Daylight linked control systems affecting its efficacy. The artificial intelligence of Neural Networks can be exploited to provide a method for …
Ventilation rates and unsatisfied percentage from indoor CO2 concentration.
2011
This work reports the results of a survey carried out on a hall in a historic building in Palermo (Italy) with the aim of assessing the air quality by means of objective measurement of carbon dioxide (CO2) concentration and its subjective evaluation through a questionnaire. The measured values of CO2 concentration were compared with those evaluated using the Meckler equation under steady-state conditions, having verified necessary parameters such as the constancy of the indoor and outdoor CO2 levels and the uniformity of the CO2 generation rate for all the occupants. The positive correspondence between measured and calculated results allowed us to utilise, under differing circum- stances, t…
Risk indexes evaluation in view of a new showcase designing of “L’Annunciata” by Antonello da Messina
2018
Museums are often hosted by heritage buildings, where the indoor thermal conditions are usually subjected to a free-floating regime, due to the difficulty of equipping them with HVAC systems that, generally, are highly impacting tools from a visual point of view. These technological tools, in fact, could conflict with the established arrangement of the works of art. This would represent a problem, since the indoor physical conditions of these premises must fall within the ranges of values suitable to ensure the safety of the works of art there exhibited. In addition, the increasing time spent by visitors inside museums (now offering various possibilities of leisure, ranging from the book sh…
The role of weather data files in Climate-based Daylight Modeling
2015
Abstract This paper illustrates the results of daylight simulations of a simple standalone office carried out using different weather data files (IWEC, Meteonorm, Satel-Light and TRY), for five European locations (Copenhagen, London, Milan, Nancy, Rome). The aim was to analyze the impact of choosing one weather file or another on the prediction of daylight availability in an indoor environment. Results were analyzed both in terms of Annual and Monthly Light Exposures and dynamic daylight performance metrics. It was demonstrated that IWEC, Meteonorm and Satel-Light weather files determine similar outcomes, instead TRY weather data always produces considerably lower values. Moreover the diffe…
Multi-Agent Systems as Effective Tools for the User-Based Thermal Comfort: an Introduction
2010
Through the paper the characterization of a comfort model, enriching that proposed by Fanger with an adaptive approach, is carried out using a Multi Agent System (MAS). This is a well suited coordinated set of Intelligent Agents, that are software applications interacting in order to follow user in his own needs and preferences in relation to indoor comfort, adapting to the changes of context variables. As a matter of fact, MAS are systems aware of the scenery where users live, following them in their own needs and preferences and adapting to their expectations. Indeed, thermal comfort conditions in the built environment are strictly related not only to the thermal and geometric building fe…
Indoor lighting quality: Effects of different wall colours
2016
This paper reports the results of measurements performed in a test room to investigate the impact of using different wall colours and light scenes on indoor lighting quality. Eye level spectral irradiances were measured for a user located inside the room and seated at a desk. These measurements allow the use of the Irradiance Toolbox, which makes it possible to calculate equivalent illuminances for the photopigments in the human eye. Moreover, the CIECAM02 colour appearance model was used to investigate the variations in hue and chroma values of the different wall colours when changing the light scene. The results demonstrate that there are significant variations in eye level spectral irra…
Integrated analysis of performances of facades for indoor comfort purposes
2002
Some guidelines for a method able to evaluate different physical characteristics of building facades, equipped with glazed surfaces, and of indoor environments in order to attain indoor comfort conditions are proposed. New graphs are introduced, showing at the same time the behaviours of several technical-physical parameters of walls, in order to allow comparative analysis of different design configurations in terms of acoustics, lighting and heat transfer properties. Similar graphs are also constructed with reference to parameters characteristic of indoor environment, in order to allow synthetic analysis of comfort conditions. The method would represent a contribution toward the definition…