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The BMW Group would like to identify and evaluate technologies to reduce transmission of Infrared (IR) radiation from sunlight into the car through our glazing and ensure high in car connectivity to mobile networks, like 5G and an improved user-experience, whilst also reducing inside-out energy flow.
Image credit: Wikipedia/CC BY-SA 4.0
Sunlight is a major source of Infrared Radiation (IR), which can contribute to heating the interior of vehicles. This increase in temperature can cause an increase in electrical power consumption for the heating, ventilation, and air conditioning (HVAC) system, ultimately reducing the car’s electric mileage.
To reduce the effects of IR radiation, current technologies use metallic coatings that absorb IR radiation, which, in turn, can negatively affect transmission in the radiofrequency (RF) electromagnetic spectrum.
In-car connectivity relies on utilizing radiofrequency (RF) communication to provide various services such as navigation (using GPS, GALILEO, etc.) and cellular phone use (via 3G, 4G, 5G or 6G networks). This communication takes place across a broad spectrum of frequencies. Looking ahead, the future of communication is expected to trend towards even higher frequency ranges, with the advent of 6G exploring terahertz (THz) bandwidths in 2030.
BMW is looking for technologies and techniques of interest that include (but are not limited to) non-metallic coatings, film and coating technologies, and processing techniques in glazing to ensure at the same time reflectivity in the IR and broad radiofrequency transmissivity.
The most effective approaches will have an ability to reflect IR radiation, preserve visible light transmission and RF transparency, maintain thermal performance, withstand environmental factors typical of a car use case (-40/+50 C, erosion, wind, etc.).
Submissions to this Challenge must be received by Apr 10, 2023.
Source: NineSights
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