Hyundai has developed a new window tint called Nano Cooling Film that aims to keep vehicle interiors cooler, thus reducing the need for air conditioning and saving energy. The tint consists of three layers, with an outer layer radiating heat at mid-infrared wavelengths and two inner layers reflecting incoming heat at near-infrared wavelengths. This technology was recently put to the test on customer cars in Lahore, Pakistan, where temperatures can exceed 122 degrees Fahrenheit.
### Testing and Results
Hyundai conducted tests on 70 vehicles in Lahore and found that the interior temperatures dropped significantly with the Nano Cooling Film. In their laboratory tests, they observed temperature decreases near the driver’s head of 19.8 degrees compared to conventional tinting and 22.2 degrees compared to no tint at all. Despite complying with local regulations that prohibit attaching tinted film to vehicle windows, the Nano Cooling Film proved to be effective in reducing interior temperatures.
### Potential Commercialization
While Hyundai has not disclosed any specific plans for commercialization, they mentioned that the Nano Cooling Film can be used in conjunction with conventional tint film where regulations permit it. This technology could be particularly useful in hotter regions of the U.S. where keeping the vehicle interior cool is a priority.
### Solar Cells Integration
In addition to advanced tinting technologies, there have been efforts to combine tinted windows with solar cells to generate energy. Although spray-on solar cells have not yet materialized, some hybrids and electric vehicles now feature roof arrangements that block the sun and harness solar energy. EVs are generally more efficient at cooling cabins in hot weather than heating them, and heat pumps can help in maintaining a comfortable cabin temperature by transferring heat.
### Conclusion
The development of Hyundai’s Nano Cooling Film showcases the advancements in automotive window tinting technology aimed at enhancing comfort and energy efficiency. By reducing the interior temperatures of vehicles, this innovative film can contribute to saving energy used for air conditioning, especially in regions with extreme heat. While further research and development are needed, the potential integration of solar cells with tinted windows could lead to more sustainable and energy-efficient vehicles in the future.