In this short clip the heat-up results of a very “quick and dirty” prototype setup of two different objects can be seen. The base materials were directly coated with our thermoelectric polymer, whereby the voltage was set to 220V. The heating power in this setup was about 30 kW/m². With this setup we were able to heat up the 6mm thick concrete to 100°C within 40 seconds. After reaching this temperature, the concrete stayed warm for more than 30 minutes. Just amazing.
This week, a couple of severe misuse tests have been performed. Very interesting were the high temperature tests of a standard PowerFilm element. Even at temperatures between 200°C and 220°C the element stayed 100% stable and was not damaged. To prevent the ground – on which the element was placed on – from being damaged, we used some insulation material to place the heating surface on. Because of the thinness of the element it is not always 100% connected to the ground and therefore pillows of air are locally trapped between the PowerFilm and the ground. As air is a very good insulator, the areas of the heating element under which air is located, get warmer than areas which are perfectly fitted to the ground. At the demonstrated heating performance this effect leads to locally different temperatures, which can be seen in the picture below.