Thermal insulation cost optimality of opaque constructive solutions of buildings under Portuguese temperate climate

Raimundo, António M.; Saraiva, Nuno Baía; Oliveira, A. Virgílio M.

doi:10.1016/j.buildenv.2020.107107

Cited by 34 publications

(74 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, it is also quite common for the policymakers to set U values' upper limit for a building envelope and its components. At the same time, the energy efficiency of buildings can be further enhanced by applying additional passive design measures [43], which do not represent such a substantial financial investment as the implementation of a very thick thermal insulation (example of a study aiming at optimum insulation thickness was shown by Raimundo et al [44]). Besides, Andrea et al [45] exposed that homeowners are only aware of bioclimatic principles and that effective planning is needed to improve the residential sector's energy efficiency.…”

Section: Knowledge Gap Identification and Study Objectivementioning

confidence: 99%

Strategy for achieving long-term energy efficiency of European single-family buildings through passive climate adaptation

Pajek

Košir

2021

Applied Energy

View full text Add to dashboard Cite

Low energy use of single-family buildings can be assured solely by passive design.• Passive adaptation only partly counterbalances climate change effects on energy use.• Total energy use will decrease in cold and temperate and increase in warm climates.• The most effective long-term climate adaptation measure is applying smaller windows.• New buildings should be designed according to mid-term optima (2020/2050 period).

show abstract

Section: Knowledge Gap Identification and Study Objectivementioning

confidence: 99%

Strategy for achieving long-term energy efficiency of European single-family buildings through passive climate adaptation

Pajek

Košir

2021

Applied Energy

View full text Add to dashboard Cite

show abstract

“…In terms of the cost, EPS is the most promising thermal insulation material, and its best location is in the middle of the building envelope. Depending on the climatic zone and the typology of the building, the cost-optimal thickness is up to 10 cm [21,22].…”

Section: Selected Properties Of Available Thermal Insulation Materialsmentioning

confidence: 99%

The Analysis of Small Investors’ Demands on a Thermal Insulation System for a Family House: A Case Study

2021

View full text Add to dashboard Cite

This study deals with small investors’ demands on thermal insulation systems when choosing the most suitable solution for a family house. By 2050, seventy percent of current buildings, including residential buildings, are still expected to be in operation. To reach carbon neutrality, it is necessary to reduce operational energy consumption and thus reduce the related cost of building operations and the cost of the life cycle of buildings. One solution is to adapt envelopes of buildings by proper insulation solutions. To choose an optimal thermal insulation system that will reduce energy consumption of building, it is necessary to consider the environmental cost of insulation materials in addition to the construction cost of the materials. The environmental cost of a material depends on the carbon footprint from the initial origin of the material. This study presents the results of a multi-criteria decision-making analysis, where five different contractors set the evaluation criteria for selection of the optimal thermal insulation system. In their decision-making, they involved the requirements of small investors. The most common requirements were selected: the construction cost, the construction time (represented by the total man-hours), the thermal conductivity coefficient, the diffusion resistance factor, and the reaction to fire. The confidences of the criteria were then determined with the help of the pairwise comparison method. This was followed by multi-criteria decision-making using the method of index coefficients, also known as the method of basic variant. The multi-criteria decision-making included thermal insulation systems based on polystyrene, mineral wool, thermal insulation plaster, and aerogels’ nanotechnology. As a result, it was concluded that, currently, in Slovakia, small investors emphasize the cost of material and the coefficient of thermal conductivity and they do not care as much about the carbon footprint of the material manufacturing, the importance of which is mentioned in this study.

show abstract

“…In the case of energy retrofitting, for example, the building envelope requires constructive solutions for the opaque and transparent elements. While the opaque envelope may change its composition ("layer order" and thickness [8]), glazing surfaces are often an obstacle when it comes to minimizing thermal transfers. These elements are the most vulnerable points on façades with the greatest heat losses during the winter (between 25 and 30%) and greatest solar gains in the summer.…”

Section: Introductionmentioning

confidence: 99%

Market-Oriented Cost-Effectiveness and Energy Analysis of Windows in Portugal

et al. 2021

Self Cite

View full text Add to dashboard Cite

Glazed systems in buildings can account for a significant part of overall energy consumption. The unfavorable relationship between energy savings and the increased cost of energy-efficient windows is often the main drawback cited by customers to justify its non-acquisition. of glazed windows. This study addresses the relationship between the investment costs in windows and their energy performance and associated costs. Seventeen window manufacturers were contacted. This survey studied the state-of-the-art and the most-used windows in terms of energy efficiency and cost. Calumen and Guardian Configurator software were used to perform this assessment. Additionally, SEnergEd software was used to simulate the energy performance and compute the equivalent annual cost for the entire life cycle of buildings. Besides the economic benefits, the impact of the energy performance of the windows on the energy performance of the building was also studied. In terms of energy, the most efficient glazing system was two windows per span, resulting in a combined solar factor of 0.43 and a 0.55 W/(m2·K) heat-transfer coefficient. On the other hand, one window per span, with a solar factor of 0.79 and a 3.05 W/(m2 K) heat-transfer coefficient is the most cost-efficient to be used in Portugal.

show abstract

Thermal insulation cost optimality of opaque constructive solutions of buildings under Portuguese temperate climate

Cited by 34 publications

References 42 publications

Strategy for achieving long-term energy efficiency of European single-family buildings through passive climate adaptation

Strategy for achieving long-term energy efficiency of European single-family buildings through passive climate adaptation

The Analysis of Small Investors’ Demands on a Thermal Insulation System for a Family House: A Case Study

Market-Oriented Cost-Effectiveness and Energy Analysis of Windows in Portugal

Contact Info

Product

Resources

About