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    Breaking News

    Smart Glass Technologies, Intelligent Switching Protocols Important Energy Saving Potential

    Can reduce the primary energy use of extensively glazed buildings by up to 70%.

    Smart Glass Technologies, Intelligent Switching Protocols Important Energy Saving Potential
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    Printed Electronics Now staff11.12.20
    In October 2019, the EU-funded initiative “Switch2Save” (grant agreement No. 869929) was launched to improve the availability and affordability of electrochromic and thermochromic smart glass technologies. 
     
    About one year later, the first project results show that the use of these technologies in combination with intelligent switching protocols can reduce the primary energy use of extensively glazed buildings by up to 70%. 
     
    During an online workshop on “Energy Efficient Technologies for Building Envelopes” from Nov. 25-27, 2020, the project members will present the project progress.
     
    Smart Glass Solutions – such as electrochromic (EC) and thermochromic (TC) windows and glass façades – control the radiation energy transfer and can thus drastically reduce the energy demands for heating and air conditioning of large buildings.
     
    Also, they allow superior indoor lighting comfort in contrast to conventional mechanical window blinds.
     
    EC switching relies on materials that change their light transmittance by applying a low electrical voltage, while TC cells are based on materials that change their infrared reflection properties with increasing temperature. 
     
    The EU-funded initiative Switch2Save aims to combine and mature EC and TC systems to create lightweight energy smart Insulating Glass Units (IGUs) suitable for large windows and glass façades.
     
    A first step in the project was the development of switching protocols for the TC/EC cells to maximize the energy saving potential and to define a switching strategy for the IGUs. 
     
    These switching protocols allow controlling the state of the IGUs from bright to dark, taking into account several building related parameters. The optimal state of the IGUs should ensure visual and thermal comfort as well as energy savings.
     
    To define the optimal switching protocols, the project partners developed a general switching strategy for a virtual office building with three levels of automation: fully automatic, semi-automatic and predefined operation of IGUs. 
     
    The indicative implementation of the automatic switching strategy in the Switch2Save IGUs in two different climatic zones (Athens and Stockholm) suggests a variable heating-cooling energy saving potential between 10% and 70% in comparison to typical triple glazed windows with internal shadings. 
     
    This energy saving potential depends not only on the climatic zone but also on the mode of operation, building characteristics and the window-wall-ratio of the respective building.
     
    “The developed models and simulations show that this switching protocol is able to optimize the switching behavior of our new IGUs, leading to the maximum possible reduction of primary energy use, ensuring or even improving visual and thermal comfort. We are pleased to present these results to the public in detail for the first time in our online workshop,” said Dr. John Fahlteich, project coordinator, Fraunhofer FEP.
     
    In the next step, the protocols will be implemented to the two demo buildings of the Switch2Save project, where they will collaborate with the building automation system. 
     
    Switch2Save will demonstrate the potential in two representative fully-operating buildings – Greece’s second largest hospital in Athens and an office building in Uppsala, Sweden. 
     
    The Switch2Save consortium will replace 50 windows and 200 m² glass façade area with the new IGUs and will perform a full “before-after” comparison of the energy demand for a one-year cycle in both buildings. 
     
    The findings will accelerate the widespread implementation of energy smart glass and significantly contribute to the goal of a CO2-neutral building stock in the EU before 2050.
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      Jabil’s May Yap Awarded 2021 CIO of the Year by IDC Singapore

      Jabil’s May Yap Awarded 2021 CIO of the Year by IDC Singapore

      Award recognizes her exemplary work in digital transformation.
      09.23.21

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      Integrated Electronics Trend to Drive In-Mold Electronics to $1.5 Billion by 2032: IDTechEx

      Integrated Electronics Trend to Drive In-Mold Electronics to $1.5 Billion by 2032: IDTechEx

      Among other applications, IME is an efficient approach to making curved touch-sensitive interfaces.
      IDTechEx 09.22.21

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      The 2021 Conductive Ink Market

      The 2021 Conductive Ink Market

      The conductive ink industry is growing with new applications on the horizon, but silver prices remain a concern.
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      Sustainability and the Flexible and Printed Electronics Industry

      Flexible and printed electronics does have a good story to tell when it comes to sustainability.
      David Savastano, Editor 09.22.21

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      SEMI: North American Semiconductor Equipment Posts $3.65 Billion in Billings in August 2021

      The billings figure is 5.4% lower than final July 2021 billings of $3.86 billion and 37.6% higher than August 2020 billings of $2.65 billion.
      09.22.21

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