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

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.

[1]  Giuseppe Peter Vanoli,et al.  Rehabilitation of the building envelope of hospitals: Achievable energy savings and microclimatic control on varying the HVAC systems in Mediterranean climates , 2013 .

[2]  Danny S. Parker,et al.  A framework for the cost-optimal design of nearly zero energy buildings (NZEBs) in representative climates across Europe , 2018 .

[3]  Stamatis Zoras,et al.  Transformation of a university building into a zero energy building in Mediterranean climate , 2017 .

[4]  K. Braimakis,et al.  Cost effectiveness assessment and beyond: A study on energy efficiency interventions in Greek residential building stock , 2019, Energy and Buildings.

[5]  Manuel Duarte Pinheiro,et al.  EPBD cost-optimal methodology: Application to the thermal rehabilitation of the building envelope of a Portuguese residential reference building , 2016 .

[6]  Fausto Freire,et al.  Building retrofit addressing occupancy: An integrated cost and environmental life-cycle analysis , 2017 .

[7]  Theodoros Theodosiou,et al.  Integrating embodied impact into the context of EPBD recast: An assessment on the cost-optimal levels of nZEBs , 2020 .

[8]  F. Asdrubali,et al.  Energy and environmental payback times for an NZEB retrofit , 2019, Building and Environment.

[9]  Rr Rajesh Kotireddy,et al.  Building performance robustness assessment: Comparative study and demonstration using scenario analysis , 2019, Energy and Buildings.

[10]  Jan Hensen,et al.  A new methodology for investigating the cost-optimality of energy retrofitting a building category , 2015 .

[11]  Francesco Della Fornace,et al.  Energy retrofit alternatives and cost-optimal analysis for large public housing stocks , 2018 .

[12]  Kari Alanne,et al.  A multi-objective life cycle approach for optimal building design: A case study in Finnish context , 2017 .

[13]  Roberto Bruno,et al.  Social housing refurbishment in Mediterranean climate: Cost-optimal analysis towards the n-ZEB target , 2018, Energy and Buildings.

[14]  Fausto Freire,et al.  Energy retrofit of historic buildings: Environmental assessment of cost-optimal solutions , 2015 .

[15]  Amirhosein Jafari,et al.  Selection of optimization objectives for decision-making in building energy retrofits , 2018 .

[16]  Paolo Maria Congedo,et al.  Cost-optimal analysis and technical comparison between standard and high efficient mono-residential buildings in a warm climate , 2015 .

[17]  B. Moshfegh,et al.  Measured and Simulated Energy Use in a Secondary School Building in Sweden—A Case Study of Validation, Airing, and Occupancy Behaviour , 2020, Energies.

[18]  V. P. Bui,et al.  Evaluation of building glass performance metrics for the tropical climate , 2017 .

[19]  Mohamed Hamdy,et al.  Multi-Objective Optimization of Building Energy Design to Reconcile Collective and Private Perspectives: CO2-eq vs. Discounted Payback Time , 2017 .

[20]  Marco António Pedrosa Santos Ferreira,et al.  Comparing cost-optimal and net-zero energy targets in building retrofit , 2016 .

[21]  Giuseppe Peter Vanoli,et al.  Optimization of building envelope design for nZEBs in Mediterranean climate: Performance analysis of residential case study , 2016 .

[22]  Sture Holmberg,et al.  Economic and environmental analysis of energy renovation packages for European office buildings , 2017 .

[23]  A. M. Raimundo,et al.  Thermal insulation cost optimality of opaque constructive solutions of buildings under Portuguese temperate climate , 2020 .

[24]  V. Freitas,et al.  School building experimental characterization in Mediterranean climate regarding comfort, indoor air quality and energy consumption , 2020 .

[25]  Mohamed Hamdy,et al.  A robustness-based decision making approach for multi-target high performance buildings under uncertain scenarios , 2020, Applied Energy.