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Simulation-Based Evaluation of the Impact of an Electrochromic Glazing on the Energy Use and Indoor Comfort of an Office Room

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  • Henriqueta Teixeira

    (CERIS, Department of Civil Engineering, Architecture and Environment (DECivil), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal)

  • A. Moret Rodrigues

    (CERIS, Department of Civil Engineering, Architecture and Environment (DECivil), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal)

  • Daniel Aelenei

    (Centre of Technology and Systems/UNINOVA, Department of Civil Engineering, Faculty of Science and Technology, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
    Laboratório Associado de Sistemas Inteligentes, LASI, 4800-058 Guimarães, Portugal)

  • M. Glória Gomes

    (CERIS, Department of Civil Engineering, Architecture and Environment (DECivil), Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal)

Abstract

Electrochromic glazing alters its optical properties in the absence/presence of an electrical charge, varying from clear to dark to control daylighting and solar heat gains. This study aims to evaluate the impact of an electrochromic glazing, with indoor glare or temperature control, on the energy performance and thermal and visual comfort of an office room under three European climates, using a calibrated simulation model. The novelty of the paper lies in its combined performance assessment, using different standards and metrics. The results showed reduced climatization energy requirements with temperature control, but significantly increased artificial lighting energy use. Glare control achieved useful illuminance levels during 74–80% of working hours. Concerning temperature control, working hours within thermal comfort increased (21–43%) under a free-float regime. Moreover, the performance of this glazing was compared to that of a clear glazing with/without a reflective film and a thermochromic glazing for different solar orientations. The electrochromic glazing with glare control showed the highest energy savings (14–36%) for a western orientation, and the lowest negative impact on daylighting for a northern orientation. The best glare reduction was achieved with the reflective film. Considering the free-float regime, the electrochromic glazing, with temperature control, showed the highest increase in working hours within thermal comfort (6–9%) for a western orientation.

Suggested Citation

  • Henriqueta Teixeira & A. Moret Rodrigues & Daniel Aelenei & M. Glória Gomes, 2024. "Simulation-Based Evaluation of the Impact of an Electrochromic Glazing on the Energy Use and Indoor Comfort of an Office Room," Energies, MDPI, vol. 17(9), pages 1-29, April.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:9:p:2110-:d:1385044
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    References listed on IDEAS

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    1. DeForest, Nicholas & Shehabi, Arman & Selkowitz, Stephen & Milliron, Delia J., 2017. "A comparative energy analysis of three electrochromic glazing technologies in commercial and residential buildings," Applied Energy, Elsevier, vol. 192(C), pages 95-109.
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    4. Henriqueta Teixeira & Maria da Glória Gomes & António Moret Rodrigues & Júlia Pereira, 2021. "In-Service Thermal and Luminous Performance Monitoring of a Refurbished Building with Solar Control Films on the Glazing System," Energies, MDPI, vol. 14(5), pages 1-23, March.
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