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

António M. Raimundo, Nuno Baía Saraiva, Luisa Dias Pereira and Ana Cristina Rebelo
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António M. Raimundo: Department of Mechanical Engineering Pólo II, University of Coimbra, ADAI-LAETA, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal
Nuno Baía Saraiva: Department of Mechanical Engineering Pólo II, University of Coimbra, ADAI-LAETA, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal
Luisa Dias Pereira: Department of Mechanical Engineering Pólo II, University of Coimbra, ADAI-LAETA, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal
Ana Cristina Rebelo: Department of Mechanical Engineering Pólo II, University of Coimbra, ADAI-LAETA, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal

Energies, 2021, vol. 14, issue 13, 1-19

Abstract: 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/(m 2 ·K) heat-transfer coefficient. On the other hand, one window per span, with a solar factor of 0.79 and a 3.05 W/(m 2 K) heat-transfer coefficient is the most cost-efficient to be used in Portugal.

Keywords: glazed systems; windows; energy performance; life cycle cost; equivalent annual cost; nZEB; energy needs; building’s dynamic simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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