The Earth warms up, we turn on the air conditioner. The more the air conditioner runs, the more Earth's atmosphere is affected, and then warms up. So hot, we find the air conditioner again. As if there was no way to escape that cycle, scientists from the US and China found a way to cope . in the sky.
They invented a new technology for solar panels , which not only absorbed light and turned it into electricity, but also fired excess heat into space.
Equipment to absorb sunlight.
"We built the first device together, hoping to one day produce both energy and energy, at the same time, at the same time, by controlling two very properties. own light, " said Professor Shanhui Fan, electrical engineer and author of the new study.
The way "shooting out of space" that the researcher Fan is talking about is called "radiative cooling" : an object - any object, from the human body to your building are in - emit heat in the form of infrared light. When the object radiates heat, it loses heat because of heat radiation. The atmosphere layer holds a portion of the heat, causing the Earth to heat up.
"Imagine the atmosphere is a thick blanket covering the Earth," Professor Zhen Chen told Fast Company. "The blanket prevents heat from escaping from the Universe with ease. But on the surface of the blanket there are many small holes, you can imagine it easily, allowing the heat to escape the Universe."
Scientists tested new solar cell technology.
The new device seeks to combine radiant cooling devices with a conventional solar cell, creating a hybrid technology that can absorb heat and release heat to the environment. The battery is about the size of a CD, located on a cylindrical radiation cooler made of silicon nitride, silicon, and aluminum layers placed in a sealed vacuum.
The purpose of the device: the solar cell does not absorb infrared light, so when it passes through the battery, the radiator of the radiator can bring it back into the universe, passing through the "holes in the plate." blanket " mentioned above.
Through testing, scientists proved that the device worked.
Light penetrates the plate down to the radiant cooling device.The device will repel infrared light onto the universe.
"Our success shows that heat accumulates in the lower part, penetrates the upper part and shoots , " Professor Chen said. This success is the first step, more testing is needed before we can install this device on the roof. For the first issue: The amount of electricity produced is still limited. A solar cell whose purpose is to generate electricity but cannot do it, is clearly not applicable to practice.
But when we overcome that obstacle, we will have a completely new solar cell.
"We still know that the Sun is the perfect natural source of heat, given to people naturally," said Professor Chen. "But I don't realize that nature also gives mankind a great place to release heat, that's the Universe."
The study was published in Joule scientific journal.