He Climate change This leads us to such an extreme temperature situation that the search Alternative systems for cooling the house This is a priority. If we cling only to air conditioner, Energy costs can be very expensive and at the same time counterproductive. Therefore, it was tested, for example, with options such as such white paintings that reflect the majority of solar radiation They arrive. There are even paintings that, through a mechanism similar to sweating, removing heat from the inside of the buildings. But what if we do not want to draw Blanco buildings? Could you get something like that just with cement?
This question was asked by the researcher Fengyin duwho at that time spent a doctoral degree in South -Eastern University NankinIn China, in collaboration with the University of Perdi, in Indiana, USA. The answer to this question is in the study that has just been published with your team in The science of achievementThe field in it shows data on the new cement capable of cooling at home A mechanism similar to white painting.
At the moment, of course, this cement, which will free us from air conditioning, is only tested On a small scale. Nevertheless, Du has already made the calculations of his price, raising it at the industrial level. And it guarantees that it will be even cheaper than some market cements. Of course, everything looks the most interesting.
How does this cement work to cool houses without air conditioning?
Typically, the main ingredient in cement is a mixture of minerals, such as limestone, clay and ground clay. Then you can add additives that contribute to the cement different qualities Without affecting its basic properties: this ability to form the dough when mixing with water, which hardens when cooling.
In this case, a small variation was made, since they were used as the main dust Granus and plaster GranulosAs soon as this dust was achieved, it was wet and resulted in Silicone mold with small holesThe field in this way, when cooling, holes were obtained by which air flows, causing small depression on the surface of the cement in which they are sown Ettringite crystalsMineral with great reflective ability. Finally, the recipe for this cement was completed using Gel rich in aluminum which allows infrared light to pass through the material.
Thus, when the Sun affects the walls of the building built with this cement, Ettringite crystals reflect the infrared radiation responsible for most of the heating created by King Star. In turn, these radiation can occur through cement due to the aluminum gel, reaching from the outside and freeing the environment. The building remains cooled without air conditioning.
The first tests were very positive
The authors of this study checked their cement to cool the roof house, which are very exposed to the sun university. It was noted that the surface temperature of the ceiling became 5.4 ºC less than the surrounding air And also 26 ºC is lower than the one that will be achieved using Portland cementOne of the most used cements for building buildings.
This means that, as a rule, cement absorbs infrared radiation, overheating of the buildings, but in this case this overheating is not only avoided, but there is also a clear cooling of the building.
What will be the price?
The authors of the study believe that this cement to cool houses without air conditioning is easily scale at the industrial level. In addition, it does not require high temperatures for its production, as is the case with Portland Cement, so its cost will be About 5 dollars per ton below. All of them are advantages. Perhaps in the future all houses were built with such cement and drawn by the purpose that South And cool the interior. We could finally say goodbye to the air conditioner.
Source: Hiper Textual
