Minha Visão

Superwhite Paint Will Reduce Need for Air Conditioning and Actually Cool the Earth

cupom com desconto - o melhor site de cupom de desconto cupomcomdesconto.com.br


Purdue University engineers have created white paint that can keep surfaces up to 18 degrees Fahrenheit cooler than their ambient surroundings – almost like a refrigerator does, but without consuming energy. Commercial “heat rejecting paints” currently on the market reflect only 80%-90% of sunlight and cannot achieve temperatures below their surroundings. The white paint that Purdue researchers created reflects 95.5% sunlight and efficiently radiates infrared heat.

Earth’s surface would actually get cooler with this technology if the paint were applied to a variety of surfaces including roads, rooftops and cars all over the world. The paint would not only send heat away from a surface, but also away from Earth into deep space.

In a paper published Wednesday (Oct. 21) in the journal Cell Reports Physical Science, the researchers show that compared with commercial white paint, the paint that they developed can maintain a lower temperature under direct sunlight and reflect more ultraviolet rays.

cupom com desconto - o melhor site de cupom de desconto cupomcomdesconto.com.br

This paint would be both cheaper to produce than its commercial alternative and could save about a dollar per day that would have been spent on air conditioning for a one-story house of approximately 1,076 square feet. It would take about ten gallons to paint a 1,076 square foot house.

The world makes about ten billion gallons (55 million tons of paint a year). Saving a dollar a day would mean a payback for ten gallons of paint in 6-12 months.

If paint production was doubled and the new production was used for this superwhite paint then 100,000 square kilometers could be painted every year.

Cell Reports Physical Science- Full Daytime Sub-ambient Radiative Cooling in Commercial-like Paints with High Figure of Merit

READ  O leite cru pode abrigar muitas bactérias resistentes aos medicamentos

Paint using CaCO3 fillers with high concentration and broad particle size

The paint shows a high solar reflectance of 95.5% and sky window emissivity of 0.94

Field test shows over 37 W/m2 cooling power and over 1.7°C below ambient at noon

Commercial-like paint offers a high standard figure of merit of 0.49

The new paint is compatible with regular commercial paint fabrication processes.

SOURCES Purdue University, Cell Reports Physical Science
Written By Brian Wang, Nextbigfuture.com

Print Friendly, PDF & Email


cupom com desconto - o melhor site de cupom de desconto cupomcomdesconto.com.br

Deixe um comentário

O seu endereço de e-mail não será publicado.