This new roofing material keeps houses cool

You hardly notice the air conditioning – until the power goes out and it no longer works. But what if no electricity was needed for cooling?

A scientist invented a material that reflects the sun’s rays from roofs and even absorbs and radiates the heat from houses and buildings. And – you see – it’s made from recyclable paper.

The essential AC:
Air conditioners are present in 87% of households in the United States and cost the homeowner an average of $ 265 per year. Some homes can easily spend double that.

When global temperatures rise, nobody gives up on their air conditioning. In developing countries in particular, where the middle class can finally afford them, more people are installing air conditioning than ever before. Fifteen years ago, very few people in China’s urban areas had air conditioning; now there are more ac units than houses in china.

But AC has drawbacks: it’s expensive and it takes a lot of electricity, usually fossil fuel, which leads to air pollution and global warming.

No electricity required: Yi Zheng, associate professor of mechanical and industrial engineering at Northeastern University, calls his material “cooling paper”.

He hopes that one day people everywhere will wrap their homes in the cooling paper, reports Good News Network. In addition to the cooling advantages, the paper does not require any electricity and is 100% recyclable.

The paper can lower the room temperature by up to 10 degrees Fahrenheit, making it a radical but effective alternative to today’s air conditioning systems, which use a lot of electricity.

How to make “cooling paper”: I remember making paper as a kid by soaking newsprint, chopping it in a blender, and rolling the slurry flat while squeezing the water out. Zheng’s technique is no more advanced than my 4th grade science fair project. Instead of pressing flower petals into his pulp, he mixed it with the material that Teflon is made of. The “porous microstructure of the natural fibers” inside the cooling paper absorbs heat and conducts it away from the house.

Zheng even tried to recycle his cooling paper to make a new sheet and found that it did not lose any cooling performance in the process.

“I was surprised when I got the same result,” said Zheng. “We thought there might be a 10 percent, 20 percent loss, but no.”

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