Quantification of Moisture in Masonry via AI Evaluated Broadband Radar Reflectometry
Frenzel, Daniel; Blaschke, Oliver; Franzen, Christoph; Brand, Felix; Haas, Franziska; Troi, Alexandra; Drese, Klaus Stefan (2023)
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
Hygrothermal characterization of a plaster with recycled materials used as interior insulation
Leonardi, Eleonora; Larcher, Marco; Herrera-Avellanosa, Daniel; Stefani, Anna; Troi, Alexandra (2023)
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.
Quantification of Moisture in Masonry via AI-Evaluated Broadband Radar Reflectometry
Frenzel, Daniel; Blaschke, Oliver; Franzen, Christoph; Brand, Felix; Haas, Franziska; Troi, Alexandra; Drese, Klaus Stefan (2023)
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.
The HiBERtool: How to find the suitable Historic Building Energy Retrofit solution for your house
Troi, Alexandra; Herrera-Avellanosa, Daniel; Leonardi, Eleonora; Rieser, Alexander; Pfluger, Rainer (2023)
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.
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; Baglivo, Cristina; Congedo, Maria Paolo (2023)
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.
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.
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.; Haas, Franziska; Hussain, S.T.; Riede, F.; Siders, A.R.; Singh, C.; Sithole, P.; Troi, Alexandra (2022)
Shepherd, N.; Cohen, J.B.; Carmen, W.; Chundu, M.; Ernsten, C.; Guevara, O....
2022, 2719.
Open Access
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; Congedo, Maria Paolo (2022)
Panico, Simone; Larcher, Marco; Troi, Alexandra; Baglivo, Cristina...
Buildings, 12(8), 1258. MDPI AG 2022.
DOI: 10.3390/buildings12081258
Open Access Peer Reviewed
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.
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
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
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
Making deep renovation of historic buildings happen learnings from the Historic Buildings Energy Retrofit Atlas
Haas, Franziska; Dagmar , Exner; Herrera-Avellanosa, Daniel; Hüttler, Walter; Troi, Alexandra (2021)
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
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; Congedo, Maria Paolo (2021)
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
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
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
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
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; Engel und Thomsen, Kirsten; Rose, Jorgen; Arsan, Zeynep Durmus; Akkurt, Gulden Gokcen; Kopeinig, Gerhard; Guyot, Gaelle; Chung, Daniel (2021)
Rieser, Alexander; Pfluger, Rainer; Troi, Alexandra; Herrera-Avellanosa, Daniel...
Sustainability, 13(4), 2325. MDPI AG 2021.
DOI: 10.3390/su13042325
Open Access Peer Reviewed
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
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