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Title: A comparative energy analysis of three electrochromic glazing technologies in commercial and residential buildings

Abstract

Here, we present a simulation study of three dynamic electrochromic window glazings, including a novel glazing capable of independently modulating its optical properties in both the visible and near-infrared spectrums. This capability allows this so-called “dual-band” technology to actively manage the solar heat and visible light transmitted into a building's interior, and creates the potential for heating, cooling, and lighting savings vis-à-vis competing window technologies. In this study EnergyPlus is used to simulate annual energy performance of the dual-band electrochromic (DBEC) glazing in three building types and 16 U.S. climate regions. The savings potential of DBEC windows are presented relative to a conventional electrochromic glazing; a visibly transparent, near-infrared switching electrochromic glazings; and several static alternatives, including ASHRAE 90-2010 standard compliant windows. Results indicate that the DBEC glazings are capable of outperforming alternatives in a diverse set of locations and building types, including both heating and cooling-dominated regions. Relative to code-compliant static windows, the DBEC is capable of achieving annual primary energy savings between 6 and 30 kW h/ft2 of window area from reduced heating, cooling, and lighting demand. Relative to other advanced glazings, the savings are significantly lower, ranging from 0 to 1.2 kW h/ft2. Regional DBEC energy costmore » savings versus high performance static windows are presented to identify early potential market entries based on energy savings. Lastly, the impacts of widespread deployment of high-efficiency LED lighting on DBEC energy savings potentials are also presented.« less

Authors:
 [1];  [1];  [1];  [2]
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  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of Texas, Austin, TX (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1532218
Alternate Identifier(s):
OSTI ID: 1397016
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Applied Energy
Additional Journal Information:
Journal Volume: 192; Journal Issue: C; Journal ID: ISSN 0306-2619
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 14 SOLAR ENERGY; Dynamic windows; Electrochromic glazings; Visible light switching; NIR switching; Energy savings; Solar heat gain

Citation Formats

DeForest, Nicholas, Shehabi, Arman, Selkowitz, Stephen, and Milliron, Delia J. A comparative energy analysis of three electrochromic glazing technologies in commercial and residential buildings. United States: N. p., 2017. Web. doi:10.1016/j.apenergy.2017.02.007.
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DeForest, Nicholas, Shehabi, Arman, Selkowitz, Stephen, & Milliron, Delia J. A comparative energy analysis of three electrochromic glazing technologies in commercial and residential buildings. United States. https://doi.org/10.1016/j.apenergy.2017.02.007
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DeForest, Nicholas, Shehabi, Arman, Selkowitz, Stephen, and Milliron, Delia J. Tue . "A comparative energy analysis of three electrochromic glazing technologies in commercial and residential buildings". United States. https://doi.org/10.1016/j.apenergy.2017.02.007. https://www.osti.gov/servlets/purl/1532218.
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@article{osti_1532218,
title = {A comparative energy analysis of three electrochromic glazing technologies in commercial and residential buildings},
author = {DeForest, Nicholas and Shehabi, Arman and Selkowitz, Stephen and Milliron, Delia J.},
abstractNote = {Here, we present a simulation study of three dynamic electrochromic window glazings, including a novel glazing capable of independently modulating its optical properties in both the visible and near-infrared spectrums. This capability allows this so-called “dual-band” technology to actively manage the solar heat and visible light transmitted into a building's interior, and creates the potential for heating, cooling, and lighting savings vis-à-vis competing window technologies. In this study EnergyPlus is used to simulate annual energy performance of the dual-band electrochromic (DBEC) glazing in three building types and 16 U.S. climate regions. The savings potential of DBEC windows are presented relative to a conventional electrochromic glazing; a visibly transparent, near-infrared switching electrochromic glazings; and several static alternatives, including ASHRAE 90-2010 standard compliant windows. Results indicate that the DBEC glazings are capable of outperforming alternatives in a diverse set of locations and building types, including both heating and cooling-dominated regions. Relative to code-compliant static windows, the DBEC is capable of achieving annual primary energy savings between 6 and 30 kW h/ft2 of window area from reduced heating, cooling, and lighting demand. Relative to other advanced glazings, the savings are significantly lower, ranging from 0 to 1.2 kW h/ft2. Regional DBEC energy cost savings versus high performance static windows are presented to identify early potential market entries based on energy savings. Lastly, the impacts of widespread deployment of high-efficiency LED lighting on DBEC energy savings potentials are also presented.},
doi = {10.1016/j.apenergy.2017.02.007},
journal = {Applied Energy},
number = C,
volume = 192,
place = {United States},
year = {2017},
month = {2}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.apenergy.2017.02.007
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Cited by: 65 works
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Figures / Tables:

Figure 1 Figure 1: Illustration of transmittance of dynamic window insulated glass units (IGU) in each operational state. Conventional ECs transition between states 2 and 3. NIR ECs transition between states 1 and 2. Dual-band ECs are capable of transitioning between each of the above states. Rejection of UV, NIR and visiblemore » light occurs primarily through absorption and re-radiation.« less
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    Works referencing / citing this record:

    Multi-Season Assessment of Occupant Responses to Manual Shading and Dynamic Glass in a Workplace Environment
    journal, December 2019

    • Choi, Joon-Ho; Loftness, Vivian; Nou, Danny
    • Energies, Vol. 13, Issue 1
    • DOI: 10.3390/en13010060

    Chromogenic Technologies for Energy Saving
    journal, November 2020

    Comparative Performance of Semi-Transparent PV Modules and Electrochromic Windows for Improving Energy Efficiency in Buildings
    journal, June 2018

    • Martín-Chivelet, Nuria; Guillén, Cecilia; Trigo, Juan
    • Energies, Vol. 11, Issue 6
    • DOI: 10.3390/en11061526
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      Figures / Tables found in this record:

      Figure 1 (p. 33)figure
      Figure 2 (p. 33)figure
      Figure 3 (p. 34)figure
      Figure 4 (p. 35)figure
      Figure 5 (p. 35)figure
      Figure 6 (p. 35)figure
      Figure 7 (p. 36)figure
      Figure 8 (p. 37)figure
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      Figure 10 (p. 38)figure
      Figure 11 (p. 38)figure
      Figure 12 (p. 39)figure
      Figure 13 (p. 39)figure
      Figure 14 (p. 40)figure
      Figure 15 (p. 40)figure
      Figure 16 (p. 41)figure
      Figure 17 (p. 41)figure
      Figure 18 (p. 42)figure
      Figure 19 (p. 42)figure
      Table 1 (p. 43)table
      Table 2 (p. 43)table
      Table 3 (p. 43)table
      Table 4 (p. 43)table
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