Lab image of the tube cell structure
Solar cells are about 8% efficient in converting light to energy, at least between the hours of 10AM and 2PM. Researchers, led by David Carroll PhD, from Wake Forest University (WFU) say there is more to the sun's energy that we can see from sunrise to sunset. Infra-red radiation from even the dimmest light conditions, can be collected through new solar thermal panels. The team, at WFU, have created an array of clear tubes, 5mm in diameter, filled with oil mixed with dyes, that lay flat within a panel. The panels then draw heat from the visible light and infra-red radiation. The mixture absorbs the heat and a "spray-on" polymer photovoltaic element , on the backside of the panel. In comparison, these solar thermal panels have been shown to be 30% efficient. Not only do they generate electricity, but can also be used to warm the home. In some cases, cost savings up to 40%. The team plans to build the first square meter solar thermal cell in the summer.
Do they heat the house too much in warm weather conditions? At least this alternative energy system does not drain the world of its kinetic energy.
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