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An Experimental and Numerical Investigation of a Passive Façade and Proposals for Improving Its Energy Performance

Author

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  • Eugen Iavorschi

    (Faculty of Electrical Engineering and Computer Science, University “Ștefan cel Mare” of Suceava, 720229 Suceava, Romania)

  • Laurențiu Dan Milici

    (Faculty of Electrical Engineering and Computer Science, University “Ștefan cel Mare” of Suceava, 720229 Suceava, Romania)

  • Pavel Atănăsoae

    (Faculty of Electrical Engineering and Computer Science, University “Ștefan cel Mare” of Suceava, 720229 Suceava, Romania)

  • Constantin Ungureanu

    (Faculty of Electrical Engineering and Computer Science, University “Ștefan cel Mare” of Suceava, 720229 Suceava, Romania)

Abstract

The double-skin façade (DSF), referred to hereinafter as a passive façade, represents an alternative technology aimed at improving the energy performance of buildings with glass envelopes. A passive façade consists of a traditional façade supplemented on the interior by a secondary layer, which is separated by a ventilated cavity with a variable width. Numerous studies have been conducted to optimize the control of passive façades with the aim of improving building energy performance. This study focuses on comparing experimental data for the passive façade with numerical simulations conducted in ANSYS Fluent 17, proposing optimization options based on the analysis of temperature and velocity fields within the façade. The results reveal the dynamics of natural free convection within the passive façade, the presence of recirculation zones in the experimental model, and the manifestation of the “chimney effect” observed in the temperature analysis of the façade’s interior in both experimental and numerical models. ANSYS Fluent 17 is a numerical simulation software used extensively in engineering and research to provide precise and comprehensive solutions for complex fluid dynamics problems. Although there is a body of existing research, the need for further investigation into façade design, control, and optimization continues.

Suggested Citation

  • Eugen Iavorschi & Laurențiu Dan Milici & Pavel Atănăsoae & Constantin Ungureanu, 2025. "An Experimental and Numerical Investigation of a Passive Façade and Proposals for Improving Its Energy Performance," Energies, MDPI, vol. 18(2), pages 1-28, January.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:2:p:359-:d:1568042
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    References listed on IDEAS

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    1. Ramkishore Singh & Dharam Buddhi & Samar Thapa & Chander Prakash & Rajesh Singh & Atul Sharma & Shane Sheoran & Kuldeep Kumar Saxena, 2022. "Sensitivity Analysis for Decisive Design Parameters for Energy and Indoor Visual Performances of a Glazed Façade Office Building," Sustainability, MDPI, vol. 14(21), pages 1-27, October.
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    Cited by:

    1. Eugen Iavorschi & Laurențiu Dan Milici & Visarion Cătălin Ifrim & Constantin Ungureanu & Ciprian Bejenar, 2025. "A Literature Review on the European Legislative Framework for Energy Efficiency, Nearly Zero-Energy Buildings (nZEB), and the Promotion of Renewable Electricity Generation," Energies, MDPI, vol. 18(6), pages 1-35, March.

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