Bimetals and bipolymers – how they work
For over 100 years, metal strips made out of two different metals – called bimetals – have been used to measure temperature or to switch something at a certain temperature. The bimetals consist of two welded together strips of different metals, which expand to varying degrees due to their different coefficients of thermal expansion. As the one metal with the higher coefficient – this coefficient of expansion should be as high as possible- expands more than the metal with the lower coefficient – this coefficient of expansion should be in turn as low as possible – the welded together strips bend. Bipolymers function exactly the same way, but consist of two polymers welded together. Since polymers can have both much larger and much smaller coefficients of linear expansion the effect of bending is significantly stronger.
Our bipolymers in use
In practice, this means that the bending effect of the bipolymer is so strong that it can be used to generate electricity. Heat can be effectively converted into electricity with the bipolymer! The advantages over conventional methods of power generation are clear. Bipolymers have significantly lower manufacturing costs and are easy to process and manufacture. The better compatibility with other materials, less wear, the higher sensitivity to temperature fluctuations as well as the corrosion resistance distinguishes our products as well. In actual application we achieve the effect of bending thanks to the warmth of the sun. This way, the heat of the sun can be transformed into green, ecologically sustainable electricity via the bend. In addition, we can use the heat for two more functions. On the one hand, the house can be supplied with warm water by our solar modules, on the other hand, the house can be heated. At night, we can use the heat stored throughout the day to generate electricity 24 hours a day.