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Energy savings due to building integration of innovative solid-state electrochromic devices

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  • Cannavale, Alessandro
  • Martellotta, Francesco
  • Cossari, Pierluigi
  • Gigli, Giuseppe
  • Ayr, Ubaldo

Abstract

The next generation of adaptive facades includes dynamic electrochromic (EC) windows: they can dynamically modulate the daylight and solar energy entering buildings by application of an external voltage. Windows play a pivotal role in the definition of the energy balance as well as environmental impacts of buildings. Emerging technologies are focused on the optimization of these building components. We carried out an interdisciplinary study dealing with building integration of an innovative chromogenic technology, consisting in a recently designed single substrate solid–state electrochromic device, developed by some of the authors, with excellent figures and a compact device architecture. The practical implications on the building energy balance were analyzed by means of suitable simulations, carried out in Energy Plus. A reference office building was equipped with different glass technologies on the façade (clear glass, solar control, electrochromic glasses) and located in different cities (Rome, London and Aswan) to also include climatic effects in the analysis. The EC technology here presented outperforms all the others, with overall yearly energy savings as high as 40 kW h/m2 yr (referred to window surface) in the hottest climates, assuming the clear glazings as benchmark. Daylighting performances were significantly improved using innovative solid-state EC devices, both in terms of Useful Daylight Illuminance (UDI) and Discomfort Glare Index (DGI). In the best case, 82.7% of hours achieved optimal illuminance conditions on an annual basis.

Suggested Citation

  • Cannavale, Alessandro & Martellotta, Francesco & Cossari, Pierluigi & Gigli, Giuseppe & Ayr, Ubaldo, 2018. "Energy savings due to building integration of innovative solid-state electrochromic devices," Applied Energy, Elsevier, vol. 225(C), pages 975-985.
  • Handle: RePEc:eee:appene:v:225:y:2018:i:c:p:975-985
    DOI: 10.1016/j.apenergy.2018.05.034
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    References listed on IDEAS

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    1. Tavares, P.F. & Gaspar, A.R. & Martins, A.G. & Frontini, F., 2014. "Evaluation of electrochromic windows impact in the energy performance of buildings in Mediterranean climates," Energy Policy, Elsevier, vol. 67(C), pages 68-81.
    2. 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.
    3. M. Armand & J.-M. Tarascon, 2008. "Building better batteries," Nature, Nature, vol. 451(7179), pages 652-657, February.
    4. Favoino, Fabio & Fiorito, Francesco & Cannavale, Alessandro & Ranzi, Gianluca & Overend, Mauro, 2016. "Optimal control and performance of photovoltachromic switchable glazing for building integration in temperate climates," Applied Energy, Elsevier, vol. 178(C), pages 943-961.
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    Cited by:

    1. Alessandro Cannavale & Ubaldo Ayr & Francesco Fiorito & Francesco Martellotta, 2020. "Smart Electrochromic Windows to Enhance Building Energy Efficiency and Visual Comfort," Energies, MDPI, vol. 13(6), pages 1-17, March.
    2. Alessandro Cannavale & Francesco Martellotta & Francesco Fiorito & Ubaldo Ayr, 2020. "The Challenge for Building Integration of Highly Transparent Photovoltaics and Photoelectrochromic Devices," Energies, MDPI, vol. 13(8), pages 1-24, April.
    3. Alessandro Cannavale, 2020. "Chromogenic Technologies for Energy Saving," Clean Technol., MDPI, vol. 2(4), pages 1-14, November.
    4. Marcin Brzezicki, 2021. "A Systematic Review of the Most Recent Concepts in Smart Windows Technologies with a Focus on Electrochromics," Sustainability, MDPI, vol. 13(17), pages 1-25, August.
    5. Chambers, Jonathan & Hollmuller, Pierre & Bouvard, Olivia & Schueler, Andreas & Scartezzini, Jean-Louis & Azar, Elie & Patel, Martin K., 2019. "Evaluating the electricity saving potential of electrochromic glazing for cooling and lighting at the scale of the Swiss non-residential national building stock using a Monte Carlo model," Energy, Elsevier, vol. 185(C), pages 136-147.
    6. Wang, Cheng & Zhu, Ye & Guo, Xiaofeng, 2019. "Thermally responsive coating on building heating and cooling energy efficiency and indoor comfort improvement," Applied Energy, Elsevier, vol. 253(C), pages 1-1.

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