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Papers by Rita Andrade Santos

Research paper thumbnail of Multivariate Data Analysis of the Thermal Performance of Portuguese Residential Building Stock

KnE engineering, May 3, 2020

Research paper thumbnail of Auto-responsive technologies on opaque facades: Worldwide climatic suitability under current and future weather conditions

Journal of Building Engineering

Research paper thumbnail of Multivariate Data Analysis of the Thermal Performance of Portuguese Residential Building Stock

KnE Engineering, 2020

The purpose of this study is to explore the relationship between solar orientation, age (construc... more The purpose of this study is to explore the relationship between solar orientation, age (constructive characterization) and energy performance of Portuguese residential building stock and to assess the usefulness of exploring the Portuguese National System for Energy and Indoor Air Quality Certification of Buildings (SCE) database through multivariate analysis techniques. By using principal components technique, it was possible to condense the residential units’ features to only four principal components (PC): solar orientation; constructive characterization; geometry and energy performance, making information more workable. Grouping the entities into Clusters with favourable and unfavourable solar orientation and old buildings allowed to dilute the particularities of each entity, facilitating the interpretation of the data through generalization. A regression model was generated in order to explore/confirm which factors influence summer comfort the most. Using this approach, it was...

Research paper thumbnail of Auto-responsive technologies for thermal renovation of opaque facades

Energy and Buildings, 2020

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Research paper thumbnail of Environmental and Economic Optimisation of Buildings in Portugal and Hungary

Sustainability, 2021

Life cycle assessment (LCA) is a scientific method for evaluating the environmental impact of pro... more Life cycle assessment (LCA) is a scientific method for evaluating the environmental impact of products. Standards provide a general framework for conducting an LCA study and calculation rules specifically for buildings. The challenge is to design energy-efficient buildings that have a low environmental impact, reasonable costs, and high thermal comfort as these are usually conflicting aspects. Efficient mathematical optimisation algorithms can be applied to such engineering problems. In this paper, a framework for automated optimisation is described, and it is applied to a multi-story residential building case study in two locations, Portugal and Hungary. The objectives are to minimise the life cycle environmental impacts and costs. The results indicate that optimum solutions are found at a higher cost but lower global warming potential for Portugal than for Hungary. Optimum solutions have walls with a thermal transmittance in the intervals of 0.29–0.39 and 0.06–0.19 W/m2K for Portu...

Research paper thumbnail of Old Buildings’ Façades: Fieldwork and Discussion of Thermal Retrofitting Strategies in a Mediterranean Climate

This work is within the scope of thermal retrofitting, applied to old buildings’ facades (built b... more This work is within the scope of thermal retrofitting, applied to old buildings’ facades (built between 1700 and 1960) located in Mediterranean climates, such as Portugal. The aim is to increase the sustainability of existing buildings, by reducing their energy consumption needs, for heating and cooling, and the corresponding gaseous emissions, while increasing their users’ comfort. Firstly, an analysis of the advantages and disadvantages of several thermal insulation solutions for facades was carried out, supported in current literature. Then, a survey of real retrofitting scenarios and interviews with experts was completed, to allow the selection of the most adequate thermal insulation techniques. Finally, as a result of this study, the discussion of retrofitting strategies was carried out to support the designer’s decision process, based on a flowchart with complementary tables, discussing the best thermal retrofitting technique to be implemented on old buildings’ facades, case-b...

Research paper thumbnail of Multivariate Data Analysis of the Thermal Performance of Portuguese Residential Building Stock

KnE engineering, May 3, 2020

Research paper thumbnail of Auto-responsive technologies on opaque facades: Worldwide climatic suitability under current and future weather conditions

Journal of Building Engineering

Research paper thumbnail of Multivariate Data Analysis of the Thermal Performance of Portuguese Residential Building Stock

KnE Engineering, 2020

The purpose of this study is to explore the relationship between solar orientation, age (construc... more The purpose of this study is to explore the relationship between solar orientation, age (constructive characterization) and energy performance of Portuguese residential building stock and to assess the usefulness of exploring the Portuguese National System for Energy and Indoor Air Quality Certification of Buildings (SCE) database through multivariate analysis techniques. By using principal components technique, it was possible to condense the residential units’ features to only four principal components (PC): solar orientation; constructive characterization; geometry and energy performance, making information more workable. Grouping the entities into Clusters with favourable and unfavourable solar orientation and old buildings allowed to dilute the particularities of each entity, facilitating the interpretation of the data through generalization. A regression model was generated in order to explore/confirm which factors influence summer comfort the most. Using this approach, it was...

Research paper thumbnail of Auto-responsive technologies for thermal renovation of opaque facades

Energy and Buildings, 2020

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Research paper thumbnail of Environmental and Economic Optimisation of Buildings in Portugal and Hungary

Sustainability, 2021

Life cycle assessment (LCA) is a scientific method for evaluating the environmental impact of pro... more Life cycle assessment (LCA) is a scientific method for evaluating the environmental impact of products. Standards provide a general framework for conducting an LCA study and calculation rules specifically for buildings. The challenge is to design energy-efficient buildings that have a low environmental impact, reasonable costs, and high thermal comfort as these are usually conflicting aspects. Efficient mathematical optimisation algorithms can be applied to such engineering problems. In this paper, a framework for automated optimisation is described, and it is applied to a multi-story residential building case study in two locations, Portugal and Hungary. The objectives are to minimise the life cycle environmental impacts and costs. The results indicate that optimum solutions are found at a higher cost but lower global warming potential for Portugal than for Hungary. Optimum solutions have walls with a thermal transmittance in the intervals of 0.29–0.39 and 0.06–0.19 W/m2K for Portu...

Research paper thumbnail of Old Buildings’ Façades: Fieldwork and Discussion of Thermal Retrofitting Strategies in a Mediterranean Climate

This work is within the scope of thermal retrofitting, applied to old buildings’ facades (built b... more This work is within the scope of thermal retrofitting, applied to old buildings’ facades (built between 1700 and 1960) located in Mediterranean climates, such as Portugal. The aim is to increase the sustainability of existing buildings, by reducing their energy consumption needs, for heating and cooling, and the corresponding gaseous emissions, while increasing their users’ comfort. Firstly, an analysis of the advantages and disadvantages of several thermal insulation solutions for facades was carried out, supported in current literature. Then, a survey of real retrofitting scenarios and interviews with experts was completed, to allow the selection of the most adequate thermal insulation techniques. Finally, as a result of this study, the discussion of retrofitting strategies was carried out to support the designer’s decision process, based on a flowchart with complementary tables, discussing the best thermal retrofitting technique to be implemented on old buildings’ facades, case-b...