Scientists have developed a polymer coating that cools iron roofs
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Probably very few would have been brave souls who would dare to walk barefoot in the summer on a hot tin metal roof. These surfaces absorb sunlight, slowly but surely, and eventually become corrugated in the oven, warming not only the environment but also living space inside the house. But recently a group of researchers from University of technology Sydney (UTS) has developed a new material that cools a tin roof so that it becomes even colder than the outside air, thereby reducing energy consumption for cooling the house in the hot summer months.
Researchers have created a material from a commercially available polyether, covering it with a layer of silver. This polymer coating can be used as the main roof for buildings, and can reduce "heat island effect" caused by heating of the roof by an average of 9 – 12 degrees Celsius.
Promising new material absorbs only three percent of incident sunlight at the same time radiating heat in the infrared range. Researchers have conducted the first testing of the polymer coating by placing it on the roof of the building of the faculty covered all day sun. According to the experiment results, a new roof was warmed up to 11 degrees Celsius less than the roof of a nearby building, covered in just white paint.
The researchers also found that dirt and dust gathering on the surface of the new coating over time, does not affect its reflective characteristics, which is an important advantage for the subsequent evaluation of the profitability of production of new material.
The problem of reducing the "heat island effect" which usually occurs in cities where mostly used reinforced concrete structures and bituminous roofing, has long occupied the minds of researchers and engineers around the world. For example, in 2012, scientists from the Swiss Federal Institute of technology in Zurich have developed a special Mat to place on the roof that collects rainwater and then dries in the sun, cools the room within the building. City BioSkin facade, which was installed on 25-storey building NBF Osaki Building in Tokyo uses Japanese traditional cooling methods such as water spray, and bamboo blinds maintain the temperature of the internal spaces at the proper level. It is hoped that the material developed by Sydney scientists to reduce "heat island effect" will be more practical and easy to manufacture. published