At Stanford University, scientists have first shown that heat from heat and heat can simultaneously collect one device. Their investigation, published on 8 November, Julie, Suggests that the devices can not compare to the ground and prepare the solar and cosmic energy, and will actually facilitate each other's function more efficiently.
Renewable energy is more popular as an economical and efficient alternative to fossil fuels, with solar energy topping charts as the world's favorite. But there is another strong energy source overhead that can only reverse function – external space.
"It is widely known that the sun's perfect heat nature offers people on earth," says Zen Chen, the first author of the study, currently associating with Stanford's former PostDoced Research Associates and currently Professor at the South East University of China. "It is less widely recognized that nature offers people with the outside world as heat sinks."
Objects heat as infrared radiation – is an invisible form of human eye. Most of this radiation is reflected in atmospheric particles, but some of them move in space, which will allow surfaces that are sufficient for infrared space to radiate their surrounding temperatures below. The radiation cooling technology reflects a wide range of infrared light, providing an alternating conditioning that does not provide greenhouse gases. It can also improve the efficiency of solar cells, which reduces hot solar elements – if only two technologies can be equally equally under one roof.
Chen and his colleagues developed an apparatus that combines radiation cooling with solar absorption technology. The device consists of heat nitride, silicon and aluminum layer on the upper part of the radiation point, which contains the loss of unwanted heat loss in the vacuum. Both solar absorption and atmosphere is transparent mid-infrared 8-13 micron, offering a radiation cooler for the channel infrared radiation outdoors. The team showed that the combined apparatus can simultaneously provide 24 m cigarette heating and cooling of up to 29 brightness, solar absorption, improving the radiation cooler by blocking sunlight from sunlight.
"On the roof, we think that the photovoltaic cell can supply electricity, while the radiation cooler can cool down home in hot summer days," says Chen.
Although this technology promises, Chen believes there is still a lot of work before it can be used in commercial use. Vacuum containing the device may be simplified. The infrared transparent window made of zinc selenide is still very expensive and the sun's absorption and radiation cooler can be developed from low-cost high performance materials. Chen believes that it is also important to use photo molecular cells in the solar absorption site – the idea that is not yet shown. But despite these practical challenges, the team believes that this research reveals that renewable energy envisages more renowned potential than previously thought.
"I think this technology can revolutionize the current solar cell technology," says Chen. "If our concept is demonstrated and magnified, the future sun will have two functions: electricity and cooling."
Materials provided Cell press. Note: Edit content for style and length.