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Sweden

Chromogenics – smart windows

The Swedish company Chromogenics AB is world leading in development and manufacturing of products based on electrochromism.

The electrochromic technology is based on a thin (<0.4mm) plastic laminate foil that is able to regulate its transmittance of light and heat radiation by the application of a low electrical voltage (1.5V), and that has a memory effect. The foil can be applied to glass or used as laminate between layers of glass. The voltage drives ions from a layer of nickel oxide, via a polymer electrolyte, into a layer of tungsten oxide. Both of the oxide layers then become darker. Reversing the polarity makes the ions move in the opposite direction, and the two layers brighten. Applications for ChromoGenics energy reducing electrochromic technology include windows for architectural and transport vehicle markets.

Smart window technology is a solution which can reduce energy consumption in buildings by as much as 50%. ChromoGenics electrochromic technology makes windows 30-86% more energy efficient. ChromoGenics technology can reduce the maximum load on the cooling system by 15-41%.

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Material efficient scalable solar module for both thermal and electricity production

Solarus panels yield a high efficiency at a wide range of temperatures, which allows them to be suitable for many applications. Solarus provides system scalability, flexible installation methods, flat packaging as well as an easier way to harvest Solar energy.

In a normal PV system, a DC to AC inverter is usually connected to the PV modules in order to pass the electricity to the grid. However, passing back to the grid is not yet allowed in all countries. Lithium or other types of battery are therefore needed to store the electricity generated by the PV panels.

As for thermal system, an accumulator tank (boiler) is necessary to store the heat from the thermal solar collectors in the form of hot water. The hot water inside the boiler could be used directly as tap water or could be channeled into heat exchange elements for room heating.

The new hybrid system is not more complicated than a combination of the two systems mentioned above with uniform solar panels instead of side-by-side PV modules and thermal collectors. The heat output from the hybrid panel is transferred through solar pipes to the heat storage boiler while the electricity is transferred to the inverter or battery.

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