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Quantification of Moisture in Masonry via AI Evaluated Broadband Radar Reflectometry

Frenzel, Daniel; Blaschke, Oliver; Franzen, Christoph; Brand, Felix; Haas, Franziska...

Vortrag: Salt Weathering of Buildings and Stone Sculptures Asia 2023, S. 195-206.



Monitoring rising damp in solid masonry walls: An experimental comparison of five different methods

Panico, Simone; Herrera-Avellanosa, Daniel; Troi, Alexandra (2023)

Journal of Building Engineering 75, 106999.
DOI: 10.1016/j.jobe.2023.106999


Peer Reviewed
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Hygrothermal characterization of a plaster with recycled materials used as interior insulation

Leonardi, Eleonora; Larcher, Marco; Herrera-Avellanosa, Daniel; Stefani, Anna...

2nd International Conference on Moisture in Buildings (ICMB23), 3-4 July 2023.


Open Access Peer Reviewed
 

Interior insulation plays a key role in reducing the energy consumption of historic buildings. However, it might cause moisture accumulation
and must be thoroughly analyzed. The use of recycled materials allows for further reduction of environmental impact. This paper presents
the study of a new insulating plaster containing aerogel and recycled glass used as capillary active interior insulation system. Firstly, the
hygrothermal properties of the material are measured in laboratory to obtain a complete characterization. Laboratory tests results are post-
processed to obtain the data required as input by the simulation software. Finally, hygrothermal simulations are carried out to investigate
the material’s behavior in realistic application scenarios and to study how different input parameters affect the results.

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Quantification of Moisture in Masonry via AI-Evaluated Broadband Radar Reflectometry

Frenzel, Daniel; Blaschke, Oliver; Franzen, Christoph; Brand, Felix; Haas, Franziska...

Heritage 6 (7), S. 5030-5050.
DOI: 10.3390/heritage6070266


Open Access Peer Reviewed
 

Humidity, salt content, and migration in building materials lead to weathering and are a common challenge. To understand damage phenomena and select the right conservation treatments, knowledge on both the amount and distribution of moisture and salt load in the masonry is crucial. It was shown that commercial portable devices addressing moisture are often limited by the mutual interference of these values. This can be improved by exploiting broadband radar reflectometry for the quantification of humidity in historic masonry. Due to the above-mentioned limitations, today’s gold standard for evaluating the moisture content in historic buildings is still conducted by taking drilling samples with a subsequent evaluation in a specially designed laboratory, the so-called Darr method. In this paper, a new broadband frequency approach in the range between 0.4 and 6 GHz with improved artificial-intelligence data analysis makes sure to optimize the reflected signal, simplify the evaluation of the generated data, and minimise the effects of variables such as salt contamination that influence the permittivity. In this way, the amount of water could be determined independently from the salt content in the material and an estimate of the salt load. With new machine learning algorithms, the analysis of the permittivity is improved and can be made accessible for everyday use on building sites with minimal intervention by the user. These algorithms were trained with generated data from different drying studies on single building bricks from the masonries. The findings from the laboratory studies were then validated and evaluated on real historic buildings at real construction sites. Thus, the paper shows a spatially resolved and salt-independent measurement system for determining building moisture.

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The HiBERtool: How to find the suitable Historic Building Energy Retrofit solution for your house

Troi, Alexandra; Herrera-Avellanosa, Daniel; Leonardi, Eleonora; Rieser, Alexander...

www.buildup.eu.


Open Access Peer Reviewed
 

Experts from the IEA SHC Task 59 and the Interreg project, ATLAS, make available a range of more than 130 energy retrofit solutions for historic buildings – via the best practice collection in the HiBERatlas and the online decision guidance of the HiBERtool.

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Identifying key parameters through a sensitivity analysis for realistic hygrothermal simulations at wall level supported by monitored data

Panico, Simone; Larcher, Marco; Marincioni, Valentina; Troi, Alexandra...

Building and Environment, 229, 109969 2023, 109969.
DOI: 10.3390/buildings12081258


Open Access Peer Reviewed
 

The reliability of hygrothermal simulations of building components is key for designing energy efficiency measures, assessing living comfort, and preventing building damage. The model accuracy is related to the reliability of the selection of input parameters. Due to the high uncertainty, the selection of the input values is challenging. This work aims to calibrate a hygrothermal simulation model exploiting monitored values recorded in a case study located in Settequerce (Italy), to understand how close to reality a numerical model can be. Moreover, a sensitivity analysis, based on the Morris method together with a Latin Hypercube sampling, is applied to identify the input parameters that affect most significantly the simulation. The results of the calibration indicated that is possible to obtain reliable outputs by appropriately selecting materials within the database. The sensitivity analysis showed that the relative humidity under the insulation is largely influenced by the water vapor diffusion resistance factor of the plaster, applied during the renovation phase both on the internal and external side. Among the coefficients describing the coupling with the boundary conditions, only the external convective heat coefficient and the coefficient of short-wave solar radiation influence slightly the objective function.

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Digital skills for Heritage Conservation

Troi, Alexandra; Hess, Mona ; Huth, Olaf; Jagfeld, Matthias (2022)

www.buildup.eu.


Open Access Peer Reviewed
 

Digitalisation and digital technologies present a great opportunity for Heritage Conservation, particularly regarding our Built Heritage and its sustainable use. Professionals are needed who can understand and quantify the complex physical processes required with the help of digital tools and will collaborate with their analysis to interdisciplinary dialogue before any conservation-related decision is made.

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ICSM CHC White Paper III: The Role of Cultural and Natural Heritage for Climate Action: Contribution of Solutions Group III to the International Co-Sponsored Meeting on Culture, Heritage and Climate Change.

Shepherd, N.; Cohen, J.B.; Carmen, W.; Chundu, M.; Ernsten, C.; Guevara, O....

2022, 2719.


Open Access
 


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Thermal Modeling of a Historical Building Wall: Using Long-Term Monitoring Data to Understand the Reliability and the Robustness of Numerical Simulations

Panico, Simone; Larcher, Marco; Troi, Alexandra; Baglivo, Cristina...

Buildings, 12(8), 1258. MDPI AG 2022.
DOI: 10.3390/buildings12081258


Open Access Peer Reviewed
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Overheating Risks and Adaptation Strategies of Energy Retrofitted Historic Buildings under the Impact of Climate Change: Case Studies in Alpine Region

Hao, Lingjun; Herrera-Avellanosa, Daniel; Del Pero, Claudio; Troi, Alexandra (2022)

Applied Science, 2022 (12), 14, 7162 2022, 7162 (14).
DOI: 10.3390/app12147162


Open Access Peer Reviewed
 

Energy retrofits can enhance the liveability and efficiency of historic buildings while preserving their historic and aesthetic values. However, measures like improved insulation and airtightness may increase their vulnerability to overheating and climate change may further worsen their performance in the future. This paper investigates indoor overheating risks brought by climate change in retrofitted historic buildings and proposes effective adaptation strategies. Firstly, local weather conditions are analysed to identify homogenous climatic zones. For each climatic zone, “a business-as-usual” emissions scenario is adopted, and most representative regional climate models are selected to obtain hourly output of future climate projection. A comparative study is adopted where typical alpine residential buildings, “Portici house”, are simulated with regard to future energy use and indoor thermal state using the dynamic model in EnergyPlus. Energy use and indoor thermal conditions are compared before and after energy retrofit, as well as under present and future climate conditions. The results demonstrate that retrofit interventions could significantly improve energy efficiency of historic buildings in both present and future scenarios. A change in climate together with retrofit interventions will, however, result in higher risk of indoor overheating in South Tyrol. Potential negative side effects of energy retrofit could be controlled by adopting adequate shading and ventilation approaches that minimise, or eliminate, the risk of overheating during high temperature periods while optimising historic buildings’ energy performance.

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Impact of climatic parameters on rain protection layer design for refurbished historic buildings

Bottino-Leone, Dario; Larcher, Marco; Troi, Alexandra; Grunewald, John (2021)

Renewable and Sustainable Energy Reviews 152.
DOI: 10.1016/j.rser.2021.111688


Open Access Peer Reviewed
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Consideration of driving rain penetration in hygrothermal simulations of half-timbered walls

Ammer, Valentin ; Troi, Alexandra (2021)

IOP Conference Series: Earth and Environmental Science 863, 012051.
DOI: 10.1088/1755-1315/863/1/012051


Open Access Peer Reviewed
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Teaching experience with the Historic Building Energy Retrofit Atlas – HiBERatlas

Troi, Alexandra; Dagmar , Exner; Haas, Franziska (2021)

IOP Conference Series: Earth and Environmental Science 863, 012032.
DOI: 10.1088/1755-1315/863/1/012032


Open Access Peer Reviewed
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Making deep renovation of historic buildings happen learnings from the Historic Buildings Energy Retrofit Atlas

Haas, Franziska; Dagmar , Exner; Herrera-Avellanosa, Daniel; Hüttler, Walter...

IOP Conference Series: Earth and Environmental Science 863, 012017.
DOI: 10.1088/1755-1315/863/1/012017


Open Access Peer Reviewed
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Hygrothermal analysis of a wall isolated from the inside: the potential of dynamic hygrothermal simulation

Panico, Simone; Larcher, Marco; Troi, Alexandra; Codreanu, Isabella; Baglivo, Cristina...

IOP Conference Series: Earth and Environmental Science 2021, 012053.
DOI: 10.1088/1755-1315/863/1/012053


Open Access Peer Reviewed
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Using hygrothermal simulations to define safe and robust energy retrofit solutions: interior insulation of a mountain hut with extreme climate conditions

Larcher, Marco; Leonardi, E.; Troi, Alexandra (2021)

IOP Conference Series: Earth and Environmental Science 863, 012055.
DOI: 10.1088/1755-1315/863/1/012055


Open Access Peer Reviewed
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What Are the Implications of Climate Change for Retrofitted Historic Buildings? A Literature Review

Hao, Lingjun; Herrera-Avellanosa, Daniel; Del Pero, Claudio; Troi, Alexandra (2021)

Sustainability 2020, 12(18), 7557.
DOI: 10.3390/su12187557


Open Access Peer Reviewed
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M.Sc. in Digital Technologies in Heritage Conservation. Sustainable mission for education in heritage

Hess, Mona ; Schlieder, Christoph ; Schnier, V.; Troi, Alexandra (2021)

IOP Conference Series: Earth and Environmental Science 863, 012035.
DOI: 10.1088/1755-1315/863/1/012035


Open Access Peer Reviewed
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Integration of Energy-Efficient Ventilation Systems in Historic Buildings—Review and Proposal of a Systematic Intervention Approach

Rieser, Alexander; Pfluger, Rainer; Troi, Alexandra; Herrera-Avellanosa, Daniel...

Sustainability, 13(4), 2325. MDPI AG 2021.
DOI: 10.3390/su13042325


Open Access Peer Reviewed
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Hygrothermal characterization of a fictitious homogenized porous material to describe multiphase heat and moisture transport in massive historic walls

Bottino-Leone, Dario; Larcher, Marco; Troi, Alexandra; Grunewald, John (2021)

Construction and Building Materials 266.
DOI: 10.1016/j.conbuildmat.2020.121497


Peer Reviewed
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Prof. Dr. Alexandra Troi


Hochschule Coburg

Fakultät Design (FD)
Am Hofbräuhaus 1
96450 Coburg

T 09561317127
alexandra.troi[at]hs-coburg.de

ORCID iD: 0000-0002-7450-4688