Abstract A new approach to moisture detection in buildings by an optical method is presented. Limits of classical and methods are discussed. The state the art about use IR thermography illustrated as well. technique exploits characteristics materials takes into account explicitly heat mass exchange between surface environment. set experiments controlled laboratory conditions on different used better understand physical problem. testing procedure data reduction illustrated. case study a...

Museums are major energy consumers amongst buildings, especially if they housed in historical constructions. usually present high demand for the air-conditioning due to their architectonical and structural characteristics, such as presence of large exhibition rooms open spaces. At same time, temperature humidity have be strictly controlled order assure proper microclimate conditions conservation collections adequate thermal comfort visitors personnel. Moreover, despite being subjected...

In this work, Ermanno Grinzato is remembered in one of the main activities his scientific life: use IR thermography to assess quantitatively humidity content porous materials, both loose soil and materials used buildings, with an accent on historical ones. first part, direct contribution described second part some new contributions that originate ideas achievements are accounted for. Concerning contributions, it for concepts Thermal Inertia as a signature presence, forced ventilation enhance...

ABSTRACTOne of the last scientific activities Ermanno Grinzato was research on radiant heating and cooling systems. In addition to providing a novel view for thermal thermographic testing these systems, he had foreseen importance using efficient sustainable materials. Firstly, this work introduces issue systems arising interest in geopolymers. Afterwards, synergy between two fields is highlighted by realisation geopolymeric panel.KEYWORDS: Infrared thermographyhydronic systemsnon-destructive...

A method to analyse thermographic data with periodic temperature variation is proposed. heat flux generated on the surface of a specimen non-zero average value. Functions describing response plus transient effect are considered. possible linear trend also taken into account aiming at considering slow environmental variations. Based superposition effects, thanks linearity conduction equation, analysis signal proposed that applies classification evaporative effects in moistened porous building...

Applications of Infrared Thermography in buildings surveys are not limited to the identification temperature distribution and heat losses on building envelopes. As it is well known from NDT testing industrial applications, active IR thermographic methods such as heating-up/cooling-down or lock-in thermography improve results many investigations. In civil engineering these techniques have been used widely. Mostly, a quasistatic manner. This paper illustrates new approach achieve, by...

Several image processing algorithms are available to enhance the results of non destructive evaluation artworks.This work is focused on novel Partial Least Squares Thermography (PSLT) technique, that allows a strong data compression.A preliminary test fresco sample and wide survey San Gottardo Church (located in Asolo, Italy) have been conducted locate detachments with an active thermography technique.All obtained thermal sequences post processed different algorithms, including Principal...

Infrared thermography is a valuable tool for non-destructive evaluation of antique artworks. Active thermographic techniques can be applied on-site thanks to their contactless and non-invasive nature. On-site monitoring challenging task. The observed objects are often hard reach unknown thermal physical properties. Moreover there usually constraints on the availability site, in terms space time. For these reasons acquired data typically inhomogeneous need reorganized post-processed, with...

AITA is an international conference that has run since 1992 and aimed at assessing the state of art infrared spectral range technology to present its most interesting applications [...]

IR thermography applied in a proper way is able to detect very accurately temperature difference between air and surfaces. By means of this tool now possible analyse the local instantaneous heat flux through surface building. In case steady thermal state, gives performance evaluation building envelope. transient condition an averaging process or system identification algorithm must be on time-series such data. any case, it demonstrated that standard technique based meter for resistance...

Electric radiant heating panels are frequently selected during the design phase of residential and industrial systems, especially for retrofit existing buildings, as an alternative to other common such radiators or air conditioners. The possibility saving living working space ease installation main advantages electric solutions. This paper investigates thermal performance a typical panel. A climatic room was equipped with temperature sensors heat flow meters perform steady state experimental...

Thermography is now commonly used as a tool for the qualitative inspection of buildings, different purposes such energy monitoring, moisture mapping and many others.All these controls need to correctly locate in space phenomena observed evaluate area affected by phenomena.Furthermore, when thermography applied quantitatively fluxes are evaluated, precise process paramount importance.This paper intends approach issue obtain correct three-dimensional reconstruction building that will promptly...

Conservation of buildings in areas at seismic risk must take prevention into account. The safeguard architectonic heritage is an ambitious objective, but a priority for planning programmes varying levels decision making. Preservation and restoration activities be optimized to cover vast widespread historical present many countries. Masonry requires adequate level knowledge based on the importance structural geometry, which may include damage, details construction properties materials. For...

Several techniques to characterize thermal properties had been developed by using photothermal methods and IR thermography in particular.Some of them are applied this work on specimens different building materials, comparing the results trying give a correct uncertainty evaluation for each them.Thermographic measurements complemented with specific heat differential scanning calorimeter volumic mass measurements.

Historical buildings are a significant part of the Italian building stock and, in most cases, need deep refurbishment interventions to reach energy criteria required by current standards. A workflow that integrates on-site surveys and modeling is mandatory obtain effective saving measures. This work describes analysis San Vito alla Rivera church, XIV century was damaged during 2009 L'Aquila earthquake, suffering partial collapse façade roof. The latter selected for complete restoration could...

The laser flash method is a well-known procedure to determine the thermal diffusivity of wide range materials. However, in some cases there need limiting input power, measuring materials with high capacity, or investigating thick samples. These conditions lead reduction signal-to-noise ratio. Therefore, we propose new control and data acquisition system, that able repeat multiple times emission impulse measurement response specimen. With average several measurements, it possible obtain...

The materials and the technology used to build ground heat exchangers significantly affect transfer performance of a geothermal system, in addition local geological hydrogeological context. Among expense items such as coupled pumps applied drilling technology, play key role shallow market. For this reason, they are usually made with plastic. Metal tubes not widely because corrosion issues, which can compromise reliability system over time. According best practices, metal is an unfavorable...

The presence of moisture in masonry is crucial because it causes and exacerbates various deterioration mechanisms, such as crystallization salts, mechanical stresses due to freeze–thaw cycles, biological degradation, etc. assessment the water content critical for cultural heritage buildings; thus, on-site non-invasive techniques have been proposed over time. An innovative active thermographic procedure tested a laboratory assess amount via non-destructive approach. methodology based on...