The search for sustainable solutions to address the increasing global demand for energy focuses on building sector, which has an impact on the 30-40% of global consumption. A critical element of the sector is represented by the windows, often responsible for heat loss that amplifies cooling and heating needs.
It is in this context that the smart windows, a system that promises to innovate the glass window and door sector, without compromising the natural lighting of rooms and the transparency of the material.
Reducing consumption through electrochromic windows
Electrochromic (EC) windows are the most popular technology in the smart windows market. These glasses use a small electric charge to modulate the degree of transparency, adapting to the climatic conditions. During the summer months, the windows block up to 70% of the excess heat, while in winter they contain 40% energy dispersion.
The EC market is booming: in 2023 it reached an estimated value of 6,6 billion dollars, with growth forecasts up to 10,6 billion by 2028.
However, this technology has some limitations: the need for electricity to operate and transparency control that is still not very flexible, which reduces its effectiveness in colder climates.
Photochromic Windows: An Automatic Response to Light
Photochromic windows offer an interesting alternative, automatically reacting to intense sunlight using UV-sensitive compounds. Requiring no power supply, these windows are an ideal solution for protecting interiors and furnishings from UV damage.
However, their high cost and inability to effectively block infrared light limit their potential for energy efficiency.
Evolution for the future: thermochromic windows
Thermochromic windows are one of the most promising solutions. Using advanced materials (vanadium dioxide), they react to temperature changes, adjusting transparency without the need for electricity.
The potential of this type of glass is extraordinary: these windows could become a universal solution, through the integration of thermal insulation and energy storage capacity to heat or cool environments.
The main challenges for thermochromic windows concern the adaptability to lower temperatures, a limitation that currently makes them unsuitable for commercial use.
Not just for construction
Smart windows applications are not limited to residential and commercial buildings, but extend to the transport and aeronautics sectors. Airplanes and automobiles could indeed benefit enormously from the use of these technologies to improve energy efficiency and reduce environmental impact.
With the right support from public policies and increased investment in research, smart windows could become an essential tool in the fight against climate change.
Source: energiaitalia.news
