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Dr. Ricardo Barbosa
School of Engineering, University of Minho, 4800-058 Guimarães, Portugal

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0 Building Physics
0 Energy Simulation
0 climate adaptation
0 Policy Instruments
0 Energy Efficiency in Buildings

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Energy Efficiency in Buildings
Energy poverty
Buildings renovation

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Journal article
Published: 24 May 2021 in Sustainable Cities and Society
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Renovation at district scale is a key strategy to reduce CO2 emissions by optimising the implementation of renewable energy sources and taking advantage of economy of scale. This paper focuses on analysing good practice examples on energy renovations at district scale. The paper adapts a qualitative research methodology in four phases, including the multi-perspective analysis of nine exemplary renovation projects in six European countries, including identification of drivers and barriers of different stakeholders. It is found that the drivers for a district renovation are not restricted to energy savings, but typically also include improving the overall quality of life as well as the image and economic value of a district. Moreover, the need for financial models that can alleviate split-incentive problems between investors and resident organizations is identified. Barriers for carrying out a district renovation include that there is a need to comply with energy standards, that the renovation scope had to be limited to avoid a noticeable rent increase and that resettling of tenants during the renovation is often not possible. Lessons learned include that good communication amongst the different stakeholders, especially with residents, plays a key role for the success of the project. Furthermore, a strong leadership is needed to coordinate activities due to the great number of stakeholders.

ACS Style

Jørgen Rose; Kirsten Engelund Thomsen; Silvia Domingo-Irigoyen; Roman Bolliger; David Venus; Thaleia Konstantinou; Erwin Mlecnik; Manuela Almeida; Ricardo Barbosa; Jon Terés-Zubiaga; Erik Johansson; Henrik Davidsson; Mira Conci; Tiziano Dalla Mora; Simone Ferrari; Federica Zagarella; Ana Sanchez Ostiz; Jorge San Miguel-Bellod; Aurora Monge-Barrio; Juan Maria Hidalgo-Betanzos. Building renovation at district level – Lessons learned from international case studies. Sustainable Cities and Society 2021, 72, 103037 .

AMA Style

Jørgen Rose, Kirsten Engelund Thomsen, Silvia Domingo-Irigoyen, Roman Bolliger, David Venus, Thaleia Konstantinou, Erwin Mlecnik, Manuela Almeida, Ricardo Barbosa, Jon Terés-Zubiaga, Erik Johansson, Henrik Davidsson, Mira Conci, Tiziano Dalla Mora, Simone Ferrari, Federica Zagarella, Ana Sanchez Ostiz, Jorge San Miguel-Bellod, Aurora Monge-Barrio, Juan Maria Hidalgo-Betanzos. Building renovation at district level – Lessons learned from international case studies. Sustainable Cities and Society. 2021; 72 ():103037.

Chicago/Turabian Style

Jørgen Rose; Kirsten Engelund Thomsen; Silvia Domingo-Irigoyen; Roman Bolliger; David Venus; Thaleia Konstantinou; Erwin Mlecnik; Manuela Almeida; Ricardo Barbosa; Jon Terés-Zubiaga; Erik Johansson; Henrik Davidsson; Mira Conci; Tiziano Dalla Mora; Simone Ferrari; Federica Zagarella; Ana Sanchez Ostiz; Jorge San Miguel-Bellod; Aurora Monge-Barrio; Juan Maria Hidalgo-Betanzos. 2021. "Building renovation at district level – Lessons learned from international case studies." Sustainable Cities and Society 72, no. : 103037.

Journal article
Published: 09 March 2021 in Sustainability
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The intensity and duration of hot weather and the number of extreme weather events, such as heatwaves, are increasing, leading to a growing need for space cooling energy demand. Together with the building stock’s low energy performance, this phenomenon may also increase households’ energy consumption. On the other hand, the low level of ownership of cooling equipment can cause low energy consumption, leading to a lack of indoor thermal comfort and several health-related problems, yet increasing the risk of energy poverty in summer. Understanding future temperature variations and the associated impacts on building cooling demand will allow mitigating future issues related to a warmer climate. In this respect, this paper analyses the effects of change in temperatures in the residential sector cooling demand in 2050 for a case study of nineteen cities across seven countries: Cyprus, Finland, Greece, Israel, Portugal, Slovakia, and Spain, by estimating cooling degree days and hours (CDD and CDH). CDD and CDH are calculated using both fixed and adaptive thermal comfort temperature thresholds for 2020 and 2050, understanding their strengths and weaknesses to assess the effects of warmer temperatures. Results suggest a noticeable average increase in CDD and CDH values, up to double, by using both thresholds for 2050, with a particular interest in northern countries where structural modifications in the building stock and occupants’ behavior should be anticipated. Furthermore, the use of the adaptive thermal comfort threshold shows that the projected temperature increases for 2050 might affect people’s capability to adapt their comfort band (i.e., indoor habitability) as temperatures would be higher than the maximum admissible values for people’s comfort and health.

ACS Style

Raúl Castaño-Rosa; Roberto Barrella; Carmen Sánchez-Guevara; Ricardo Barbosa; Ioanna Kyprianou; Eleftheria Paschalidou; Nikolaos Thomaidis; Dusana Dokupilova; João Gouveia; József Kádár; Tareq Hamed; Pedro Palma. Cooling Degree Models and Future Energy Demand in the Residential Sector. A Seven-Country Case Study. Sustainability 2021, 13, 2987 .

AMA Style

Raúl Castaño-Rosa, Roberto Barrella, Carmen Sánchez-Guevara, Ricardo Barbosa, Ioanna Kyprianou, Eleftheria Paschalidou, Nikolaos Thomaidis, Dusana Dokupilova, João Gouveia, József Kádár, Tareq Hamed, Pedro Palma. Cooling Degree Models and Future Energy Demand in the Residential Sector. A Seven-Country Case Study. Sustainability. 2021; 13 (5):2987.

Chicago/Turabian Style

Raúl Castaño-Rosa; Roberto Barrella; Carmen Sánchez-Guevara; Ricardo Barbosa; Ioanna Kyprianou; Eleftheria Paschalidou; Nikolaos Thomaidis; Dusana Dokupilova; João Gouveia; József Kádár; Tareq Hamed; Pedro Palma. 2021. "Cooling Degree Models and Future Energy Demand in the Residential Sector. A Seven-Country Case Study." Sustainability 13, no. 5: 2987.

Journal article
Published: 05 July 2020 in Energy and Buildings
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Building renovation plays a key role in reducing greenhouse gas emissions and achieving the climate protection goals. The district scale approach is one of the most effective approaches to accelerate this process of reducing the energy consumption in the building sector as increasing its renovation rates. In this context, the Energy in Buildings and Communities Programme of the IEA, IEA-EBC started in 2017 the project “Annex 75: Cost-Effective Building renovation at District Level Combining Energy Efficiency and Renewables” aiming to explore optimal opportunities of district renovations from a cost-benefit perspective. IEA Annex 75 is a co-operative effort of participants from 13 different countries: Austria, Belgium, China, Czech Republic, Denmark, Germany, Italy, The Netherlands, Norway, Portugal, Spain, Sweden and Switzerland. In this paper, key elements of the methodology developed in Annex 75 project are presented. This methodology aims to facilitate the identification of optimal solutions in different European countries, enabling to explore similarities and differences amongst them, with a particular focus on the balance between energy efficiency measures and renewable energy measures. After a detailed description of the developed methodology, it is also applied to a case study located in Portugal and results obtained are analysed in detail. The paper demonstrates the usefulness of the methodology for evaluating and identifying optimal solutions in renovations at district scale, as well as for successfully addressing the research questions investigated by the Annex 75 project. They also provide some insights regarding the specific case study, showing that, although district systems are not usual in the current Portuguese context, these centralised solutions in renovations at district level are cost-effective interventions that can lead to significant reductions of greenhouse gas emissions and non-renewable primary energy use.

ACS Style

Jon Terés-Zubiaga; Roman Bolliger; Manuela Almeida; Ricardo Barbosa; Jørgen Rose; Kirsten Engelund Thomsen; Eduardo Montero; Raúl Briones-Llorente. Cost-effective building renovation at district level combining energy efficiency & renewables – Methodology assessment proposed in IEA EBC Annex 75 and a demonstration case study. Energy and Buildings 2020, 224, 110280 .

AMA Style

Jon Terés-Zubiaga, Roman Bolliger, Manuela Almeida, Ricardo Barbosa, Jørgen Rose, Kirsten Engelund Thomsen, Eduardo Montero, Raúl Briones-Llorente. Cost-effective building renovation at district level combining energy efficiency & renewables – Methodology assessment proposed in IEA EBC Annex 75 and a demonstration case study. Energy and Buildings. 2020; 224 ():110280.

Chicago/Turabian Style

Jon Terés-Zubiaga; Roman Bolliger; Manuela Almeida; Ricardo Barbosa; Jørgen Rose; Kirsten Engelund Thomsen; Eduardo Montero; Raúl Briones-Llorente. 2020. "Cost-effective building renovation at district level combining energy efficiency & renewables – Methodology assessment proposed in IEA EBC Annex 75 and a demonstration case study." Energy and Buildings 224, no. : 110280.

Journal article
Published: 03 May 2020 in Polymers
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An ecological mortar is designed from industrial sub-products, with the objective of utilizing both the slag residues, generated during steel manufacturing processes, and the waste from Polyurethane Foam (PF) panels, generated during refrigerator chamber manufacturing processes. The ecological mortar design involves the dosing of Electric Arc Furnace (EAF) slag, together with finely ground Polyurethane Foam, cement, and additives. An energy efficient prefabricated block is designed with the mortar, for use in construction, and its energy performance is assessed as a material inserted within the envelope of a service sector (hospital) building, either as an exterior skin, or as an enclosing component within the façade interior. The main contribution of this research is the characterization of the thermo-physical and mechanical properties of a new prefabricated panel made with recycled materials. The full characterization of the properties of these new materials is presented and discussed. The new prefabricated panel demonstrates adequate thermo-mechanical characteristics as a substitute for traditional materials, while improving the sustainability of the building. As a secondary objective, the energy behaviour of the new panels when integrated in a real building is presented by means of a case study simulation. The use of computational thermal simulation confirmed that the properties of the prefabricated block influenced the annual thermal demand of the building for heating and cooling. Improvements to the thermal inertia of the building envelope were also confirmed with the inclusion of PF waste, giving the mortar an energy performance that was similar to conventional materials, in such a way that its use in façade construction may be validated, in addition to its environmental benefits, due to it having been manufactured with critical recycled industrial waste such as EAF slag and PF, thereby contributing to both the circular economy and sustainable development.

ACS Style

Raúl Briones-Llorente; Ricardo Barbosa; Manuela Almeida; Eduardo Atanasio Montero García; Ángel Rodríguez Saiz. Ecological Design of New Efficient Energy-Performance Construction Materials with Rigid Polyurethane Foam Waste. Polymers 2020, 12, 1048 .

AMA Style

Raúl Briones-Llorente, Ricardo Barbosa, Manuela Almeida, Eduardo Atanasio Montero García, Ángel Rodríguez Saiz. Ecological Design of New Efficient Energy-Performance Construction Materials with Rigid Polyurethane Foam Waste. Polymers. 2020; 12 (5):1048.

Chicago/Turabian Style

Raúl Briones-Llorente; Ricardo Barbosa; Manuela Almeida; Eduardo Atanasio Montero García; Ángel Rodríguez Saiz. 2020. "Ecological Design of New Efficient Energy-Performance Construction Materials with Rigid Polyurethane Foam Waste." Polymers 12, no. 5: 1048.

Journal article
Published: 21 February 2020 in Sustainability
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A large-scale energy renovation intervention in existing buildings has been consistently presented as the most significant opportunity to contribute to achieving the European targets for 2030 and 2050. One of the key points for such achievement is the cost-effectiveness of the interventions proposed, which is also closely related to decent housing affordability. Prefabricated modular solutions have been pointed out as a pathway, but there are knowledge gaps regarding both its cost-effectiveness and its environmental performance. Considering a social housing multi-family building in Porto, Portugal, as a case study, this research employs energy simulations, a cost-optimal methodology and a life cycle analysis approach to assess the influence of considering embodied energy and emissions in cost-effectiveness calculations. In general terms, the hierarchical relation between calculated renovation scenarios remain identical, as well as the choice of the cost-optimal combination, which can reduce primary energy needs by 226 kWh/(y.m2). However, embodied carbon emissions and embodied energy of the materials used in the calculations, which are indicative of the sustainability of such interventions, increase the energy and carbon emissions associated to each renovation package by an average of 43 kWh/(y.m2) and 9.3 kgCO2eq/(y.m2), respectively.

ACS Style

Manuela Almeida; Ricardo Barbosa; Raphaele Malheiro. Effect of Embodied Energy on Cost-Effectiveness of a Prefabricated Modular Solution on Renovation Scenarios in Social Housing in Porto, Portugal. Sustainability 2020, 12, 1631 .

AMA Style

Manuela Almeida, Ricardo Barbosa, Raphaele Malheiro. Effect of Embodied Energy on Cost-Effectiveness of a Prefabricated Modular Solution on Renovation Scenarios in Social Housing in Porto, Portugal. Sustainability. 2020; 12 (4):1631.

Chicago/Turabian Style

Manuela Almeida; Ricardo Barbosa; Raphaele Malheiro. 2020. "Effect of Embodied Energy on Cost-Effectiveness of a Prefabricated Modular Solution on Renovation Scenarios in Social Housing in Porto, Portugal." Sustainability 12, no. 4: 1631.

Conference paper
Published: 24 February 2019 in IOP Conference Series: Earth and Environmental Science
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While facing increasingly strict regulations regarding energy efficiency, the construction sector should also adopt sustainable solutions in terms of new constructions and renovations of buildings. In particular, energy renovation of existing buildings has specific technical and economic constraints that are generally addressed through implementation of new materials and building integrated systems, whose environmental impact should be considered when assessing the most adequate solution. Within the context of the More-Connect Project, which aims to develop modular prefabricated solutions for energy renovation of buildings, several renovation scenarios for a pilot building in Portugal were assessed using a methodology to compare the cost-effectiveness of renovation measures. The article explores the use of lifecycle assessment to analyse the effect of considering embodied primary energy in cost-effectiveness calculations.

ACS Style

Manuela Almeida; Ricardo Barbosa; Raphaele Malheiro. Effect of environmental assessment on primary energy of modular prefabricated panel for building renovation in Portugal. IOP Conference Series: Earth and Environmental Science 2019, 225, 012047 .

AMA Style

Manuela Almeida, Ricardo Barbosa, Raphaele Malheiro. Effect of environmental assessment on primary energy of modular prefabricated panel for building renovation in Portugal. IOP Conference Series: Earth and Environmental Science. 2019; 225 (1):012047.

Chicago/Turabian Style

Manuela Almeida; Ricardo Barbosa; Raphaele Malheiro. 2019. "Effect of environmental assessment on primary energy of modular prefabricated panel for building renovation in Portugal." IOP Conference Series: Earth and Environmental Science 225, no. 1: 012047.

Journal article
Published: 11 January 2019 in Journal of Building Engineering
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Adequate supply of fresh outdoor air is important to create healthy and comfortable indoor building environments. Currently, most of the residential buildings in mild climate European countries, such as Portugal or Spain, remain naturally ventilated. Distinct concerns have emerged in the building community regarding the indoor air quality (IAQ) in these buildings since several studies have shown that they are often poorly ventilated. The main cause has been identified as occupants' different window opening behavior, which can vary notably from one apartment to the next. This work presents a comparative method for evaluating occupants' exposure to CO2 concentration levels in existing buildings based on the comparison of cumulative frequency distribution curves. Indoor CO2 concentration levels recorded over 17 months in the bedrooms and living rooms of eight apartments of a naturally ventilated residential building located in Porto (Portugal) were used as experimental input data for developing the method and to calibrate the IAQ performance of an EnergyPlus building model. The calibrated building model exhibited a good agreement with the recorded data on the apartments, reporting maximum Root Mean Square Errors (RMSE) for the majority of the apartments below 5 and 10% for the living rooms and bedrooms, respectively.

ACS Style

J.F. Belmonte; Ricardo Barbosa; Manuela Almeida. CO2 concentrations in a multifamily building in Porto, Portugal: Occupants' exposure and differential performance of mechanical ventilation control strategies. Journal of Building Engineering 2019, 23, 114 -126.

AMA Style

J.F. Belmonte, Ricardo Barbosa, Manuela Almeida. CO2 concentrations in a multifamily building in Porto, Portugal: Occupants' exposure and differential performance of mechanical ventilation control strategies. Journal of Building Engineering. 2019; 23 ():114-126.

Chicago/Turabian Style

J.F. Belmonte; Ricardo Barbosa; Manuela Almeida. 2019. "CO2 concentrations in a multifamily building in Porto, Portugal: Occupants' exposure and differential performance of mechanical ventilation control strategies." Journal of Building Engineering 23, no. : 114-126.

Journal article
Published: 09 August 2018 in Buildings
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The construction sector is facing increasingly strict energy efficiency regulations. Existing buildings have specific technical, functional and economic constraints, which, in fulfilling regulations, could lead to costly and complex renovation procedures and also lead to missed opportunities for improving their energy performance. In this article, the methodology for comparing cost-optimality in building renovations, developed in the International Energy Agency (IEA)–Energy in Buildings and Communities (EBC) Annex 56 project, is extended with a life cycle assessment by including embodied primary energy and carbon emissions in the calculations. The objective is to understand the relevance of embodied energy and carbon emissions in the evaluation of the cost effectiveness of building renovation solutions towards nearly zero energy buildings, as well as the effect of the embodied values in the achievable carbon emissions and primary energy reductions expected in an energy renovation. Results from six case studies, representative of different regions in Europe, suggest that embodied values of energy and carbon emissions have a decreasing effect—ranging from 2 to 32%—on the potential reductions of energy and emissions that can be achieved with renovation measures in buildings. In addition, the consideration of the embodied energy and carbon emissions does not affect the ranking of the renovation packages.

ACS Style

Manuela Almeida; Marco Ferreira; Ricardo Barbosa. Relevance of Embodied Energy and Carbon Emissions on Assessing Cost Effectiveness in Building Renovation—Contribution from the Analysis of Case Studies in Six European Countries. Buildings 2018, 8, 103 .

AMA Style

Manuela Almeida, Marco Ferreira, Ricardo Barbosa. Relevance of Embodied Energy and Carbon Emissions on Assessing Cost Effectiveness in Building Renovation—Contribution from the Analysis of Case Studies in Six European Countries. Buildings. 2018; 8 (8):103.

Chicago/Turabian Style

Manuela Almeida; Marco Ferreira; Ricardo Barbosa. 2018. "Relevance of Embodied Energy and Carbon Emissions on Assessing Cost Effectiveness in Building Renovation—Contribution from the Analysis of Case Studies in Six European Countries." Buildings 8, no. 8: 103.

E literature review
Published: 21 November 2016 in International Journal of Climate Change Strategies and Management
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This paper aims to investigate vulnerability factors that influence thermal comfort in residential buildings in the context of climate change and variability, as well as adaptive strategies that can be adopted. There is a need for research that systematically addresses factors influencing thermal comfort in the context of climate change. Using a vulnerability framework, this paper reviews existing literature to identify factors driving impacts to comfort, as well as strategies to increase adaptive capacity in buildings. Data were collected from several sources including international organizations, scientific journals and government authorities, following an initial Web-based subject search using Boolean operators. Significant impacts can be expected in terms of thermal comfort inside buildings depending on four vulnerability factors: location; age and form; construction fabric and occupancy and behaviour. Despite the fact that the majority of the existing studies are technically driven and spatially restricted, there is strong evidence of interdependencies of scales in managing vulnerability and adaptive capacity. Results from this review emphasise the importance of balance mitigation with adaptation regarding new building design and when retrofitting old buildings. The factors identified here can also be used to assist in construction of simplified tools such as a vulnerability index that helps in identifying the most vulnerable buildings and dwellings and assist in retrofit decisions. The paper offers critical insight regarding implications in building design and policy in a vulnerability framework.

ACS Style

Ricardo Barbosa; Romeu Vicente; Rui Santos. Comfort and buildings: climate change vulnerability and strategies. International Journal of Climate Change Strategies and Management 2016, 8, 670 -688.

AMA Style

Ricardo Barbosa, Romeu Vicente, Rui Santos. Comfort and buildings: climate change vulnerability and strategies. International Journal of Climate Change Strategies and Management. 2016; 8 (5):670-688.

Chicago/Turabian Style

Ricardo Barbosa; Romeu Vicente; Rui Santos. 2016. "Comfort and buildings: climate change vulnerability and strategies." International Journal of Climate Change Strategies and Management 8, no. 5: 670-688.

Journal article
Published: 01 October 2015 in Building and Environment
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ACS Style

Ricardo Barbosa; Romeu Vicente; Rui Santos. Climate change and thermal comfort in Southern Europe housing: A case study from Lisbon. Building and Environment 2015, 92, 440 -451.

AMA Style

Ricardo Barbosa, Romeu Vicente, Rui Santos. Climate change and thermal comfort in Southern Europe housing: A case study from Lisbon. Building and Environment. 2015; 92 ():440-451.

Chicago/Turabian Style

Ricardo Barbosa; Romeu Vicente; Rui Santos. 2015. "Climate change and thermal comfort in Southern Europe housing: A case study from Lisbon." Building and Environment 92, no. : 440-451.