According to foreign media reports, thousands of years ago, the ancient Egyptians invented a blue pigment, which was mainly used to draw gods and royal families. The pigment derived from calcium copper silicate is now called Egyptian blue, and the latest research found that it can save energy and generate electricity. Previous studies have shown that the surface coated with Egyptian blue can absorb incident visible light and emit it in the form of near infrared light.
In a recent new study, scientists from Lawrence Berkeley National Laboratory found that the fluorescent effect of this pigment is 10 times stronger than originally thought. In fact, the photons released by this pigment are almost 100% of the photons it absorbs, and the energy efficiency can reach 70%.
The research team led by Paul Berdahl now hopes to apply this pigment to the paint or tiles on the roof of the building, so that it can reflect the sunlight and keep the interior of the building cool, reducing the demand for electricity-consuming air conditioning.
In addition, if this pigment is applied to window glass, the near-infrared light emitted by it can be absorbed by photovoltaic cells located at the edge of the window and then converted into electrical energy.
Related research reports have been published in "Journal of Applied Physics".
Piston rings are manufactured and classified on the basis of function and usability. The primary usage of the Piston Ring is to seal the chamber (where the piston is moving), which can be a combustion chamber of a 2 stroke or a 4 stroke engine. Marine engines have three or more types of rings fitted on the circumference of the piston.
The piston ring is an essential piston part, and its numbers and functionality differ depending on the type and capacity of the engine.
In 2-stroke large engines, compression type piston rings are used to seal the combustion chamber and wiper rings are installed below them to wipe the deposits from the liner and distribute oil on the liner surface.
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