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[ Hot attention from chemical machinery equipment network ] Although the coolness of the silk has drawn us from the hot summer and the beautiful autumn, our topic today cannot be separated from the word that just said goodbye to us-"Hot".
Heat is essentially a transfer of energy.
In summer, when we are outdoors, even if it is forbidden, we will feel heat because the sunlight transfers heat energy to the surface of our skin.
For those objects that are prohibited outdoors*, they will naturally absorb a lot of heat when exposed to long-term exposure.
Chemical machinery and equipment network hotspots pay attention to chemical machinery and equipmentHeat is essentially a transfer of energy.
In summer, when we are outdoors, even if it is forbidden, we will feel heat because the sunlight transfers heat energy to the surface of our skin.
For those objects that are prohibited outdoors*, they will naturally absorb a lot of heat when exposed to long-term exposure.
The building is one of them.
After the building is irradiated by the sun, it will absorb the heat energy transferred by the sun, and this heat energy will increase the overall temperature of the space inside the building.
Although the indoor temperature can be adjusted to a certain extent through ventilation and other facilities, as well as air-conditioning and other facilities, for buildings, reducing the outdoor temperature difference caused by the sun is always a problem worth considering.
After the building is irradiated by the sun, it will absorb the heat energy transferred by the sun, and this heat energy will increase the overall temperature of the space inside the building.
Although the indoor temperature can be adjusted to a certain extent through ventilation and other facilities, as well as air-conditioning and other facilities, for buildings, reducing the outdoor temperature difference caused by the sun is always a problem worth considering.
In general, there are many ways to reduce the temperature of the interior of the building from the sun's radiation, including active heat dissipation, and some use special materials to resist the heat transfer in the irradiation, such as what we will talk about next-heat reflective paint.
Heat-reflective paint, as the name suggests, is a kind of paint that can make the object to be coated produce a temperature-regulating effect under sunlight.
There are actually many types of such coatings, and even the principles involved are different.
If they are divided according to the heat insulation mechanism, they can be roughly divided into three types: barrier type, radiation type, and reflective type.
But even so, these materials have some things in common.
For example, most heat-reflective pigments used in buildings have certain requirements in terms of anti-ultraviolet aging, waterproofing, etc.
, regardless of the principle.
Therefore, they will have certain requirements in related technologies.
There are similar applications.
There are actually many types of such coatings, and even the principles involved are different.
If they are divided according to the heat insulation mechanism, they can be roughly divided into three types: barrier type, radiation type, and reflective type.
But even so, these materials have some things in common.
For example, most heat-reflective pigments used in buildings have certain requirements in terms of anti-ultraviolet aging, waterproofing, etc.
, regardless of the principle.
Therefore, they will have certain requirements in related technologies.
There are similar applications.
At present, the commercial heat-reflective paint often used in construction has an emission efficiency of about 80%-90% for solar energy.
Objectively speaking, it has done a good job, but it seems that scholars in the field of materials science are not satisfied with this.
Recently, a new type of ultra-white paint with a reflectivity of 95.
5% was disclosed.
Objectively speaking, it has done a good job, but it seems that scholars in the field of materials science are not satisfied with this.
Recently, a new type of ultra-white paint with a reflectivity of 95.
5% was disclosed.
It is understood that this material not only reduces the temperature near the building very well in the testing process, but also has a thinner coating compared to the traditional special coating, and the cost is relatively low, so the difficulty of large-scale application is also lower.
What's more interesting is that some of the principles behind this paint are actually well understood, even scientific knowledge that most people might know in middle school.
What's more interesting is that some of the principles behind this paint are actually well understood, even scientific knowledge that most people might know in middle school.
This material uses calcium carbonate as the raw material, and the color brightness is very high (compared to the traditional white pigments are whiter).
On the one hand, light-colored surfaces are less likely to absorb heat than dark-colored surfaces.
On the other hand, calcium carbonate makes the pigments have many regular particles, which makes the paint surface more conducive to the scattering of light of different wavelengths in the sun.
On the one hand, light-colored surfaces are less likely to absorb heat than dark-colored surfaces.
On the other hand, calcium carbonate makes the pigments have many regular particles, which makes the paint surface more conducive to the scattering of light of different wavelengths in the sun.
Simple principles have been very good to give birth to new research results, which is also the beauty of scientific research.
In fact, as far as science is concerned, technology and knowledge have no distinction between high and low.
The specific point is how to integrate them.
Just like many people in elementary school understand the principle of rainbow formation, and spectroscopy is indeed an important research instrument in the field of precision scientific research.
same.
The application of technology is the true embodiment of human wisdom in the context of the big picture.
In fact, as far as science is concerned, technology and knowledge have no distinction between high and low.
The specific point is how to integrate them.
Just like many people in elementary school understand the principle of rainbow formation, and spectroscopy is indeed an important research instrument in the field of precision scientific research.
same.
The application of technology is the true embodiment of human wisdom in the context of the big picture.
Reference source for this article: Science and Technology Daily
Original title: In-depth application of the simple principle of new white paint to help buildings cool down
