National energy savings potential of cellular shades: A measurement and simulation study

Kunwar, Niraj; Bhandari, Mahabir; Curcija, Dragan C.

doi:10.1016/j.buildenv.2022.109593

National energy savings potential of cellular shades: A measurement and simulation study

Journal Article · Wed Sep 14 00:00:00 EDT 2022 · Building and Environment

DOI:https://doi.org/10.1016/j.buildenv.2022.109593· OSTI ID:1899007

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Windows are major contributors to energy demand in residential homes because of their inferior thermal resistance compared with the opaque envelope, and sometimes from unwanted solar heat gain. Window attachments can help mitigate the energy demand by controlling the solar heat gains and enhancing window thermal resistance. Cellular shades have the potential of superior thermal performance compared with generic shades because of its honeycomb structure. Here, in this study, the team analyzed the energy savings potential of cellular shades in residential homes via experimental testing for two heating seasons and energy simulations. Five shading devices—three single-cell and two double cellular/cell-in-cell shades—were used to compare the performance with generic horizontal venetian blinds using two nearly identical side-by-side rooms in a residential home. The experimental testing showed daily heating energy savings in the range of 17%–36% compared with the case without shades. The experimental testing data also exhibited improvements in thermal comfort when using cellular shades. Additionally, energy simulations were performed to evaluate the energy savings potential of the cellular shades using a residential prototype home, which demonstrated energy savings up to 9 kWh/m2/year in cold climates. The total site energy savings for heating and cooling from cellular shades was up to ~9% for the home with a heat pump and up to ~15% for a home with a gas furnace compared with cases without any shading devices. The energy savings at a national scale were up to 14.6 TWh assuming a 20% penetration rate in residential homes.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1899007

Journal Information:: Building and Environment, Journal Name: Building and Environment Vol. 225; ISSN 0360-1323

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
Cellular shades
Energy savings
EnergyPlus
Experimental testing
Shading device
Thermal comfort

National energy savings potential of cellular shades: A measurement and simulation study

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References (13)

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