The new cooling film
A found revolutionary the one that last took place in the sector of Green building. The innovation comes from a research team at the University of Cambridge and it is specifically a plant-based coating.
The film of coating has the power to get cold when it comes hit by the sun’s rays. This could lead to a completely natural regulation of the internal temperature of a building.
It is expected that theinnovation presented may thus reduce the need for air conditioning in buildings, but it is thought that it may come appliedin the not too distant future, also to motor vehicles.
Of course, its application for thebuilding has more immediate characters.
The main researcher of the Cambridge team, which gave rise to the new film, is an Italian, the chemistry Sara Vignolini
We enter the details of the new scientific discovery, and of the innovations it will introduce on the environmental plan and energetic.
What is the principle of the cooling film?
Like the same Sara Vignolini he explains, there are few materials with similar properties.
The new film does not absorb much light, while still ensuring the lighting of the building with the luce natural. And, as far as the thermal plane is concerned, a good part of the heat is reflected and therefore sent back.
Let’s see how the principle of passive cooling works
Which happens to one anyway wavelength such as not to generate problems, since it reaches beyond the atmosphere, dispersing in space.
The working principle that regulates the cooling film is the cooling down radioactive passive diurnal, indicated with the acronym PDRC.
The new vegetable fiber was presented at the spring meeting organized by theAmerican Chemical Society and find its secret in nanocrystalline cellulose (CNC). It is made up of tiny particles, each of them capable of receiving (and largely rejecting) the single wavelength of light.
The particles in question can take on various colors, specifically red, blue or green. But it must be said that they also turn out to be pretty fragile.
The coloring multilayer which it would give rise to cannot be masked by colored pigments, since they would make the cooling effect less effective, even completely disappearing.
How the cooling film is applied
In relation to the problem of fragilitythe researchers then found a solution to apply the vegetable film.
A way has been found unite the nanocrystalline cellulose particles insideethyl cellulosematerial mostly flexibleso that the fragility of the individual particles does not affect their effectiveness.
Let’s try to understand how the new vegetable film will be applied
In particular, the particles, no longer having a base rigid, are not subjected to dangerous stresses, capable of destroying them for several specimens and therefore penalize theeffectiveness of the product.
Regarding the coloringwhoever decides to acquire the refrigerating layer to be applied to the external walls of the house, will accept the attribution of films that vary in color from layer to layer, with a condition changing.
Which is not unsightly, but rather creates a picturesque effect.
Once the technology is widespread enough, during the summer months the chromatic characteristic can be found on the faces of several building.
The final result of the application is however a temperature drop of 4°C compared to what the ambient temperature is over the course of the whole day.
The advantages found of the new vegetable film
This corresponds in many cases to having a internal environment sufficiently cool only with the contribution of the cooling film and without the use of air conditioning.
The film of vegetable origin that cools in the sun (source: acs.com)
With all that obviously follows in terms of energy consumption.
In fact, in the warmer months, energy consumption skyrockets precisely because of the need for air conditioning apartment.
But with this passive mechanism absolutely nothing is consumed, just apply the layers on the walls of the house. Even where, in periods from intense heatyou will still need to operate the climatizzatorand or conditioner, these devices will be put into action with a reduced power.
In practice, a remarkable savings of electricity, and this starting from the spring months, in which on certain days we begin to use devices to regulate the temperature.
Further advantages are then to be found for theenvironmentand therefore on the level ofeco-sustainability. Think of a lower need for electricity production, which could have a positive impact on a global scale. Currently many polluting resources are consumed for the production Of energy and there is a trend shortage in the market.
All the possible applications of the new vegetable fibre
What to expect from future of this product?
What will be its scope in terms of applications?
First of all let’s start from the fact that technology makes use of a raw material, the cellulose nanocristallina exactly, which it really is economic.
Let’s see what other applications to expect in addition to savings on air conditioning
An aspect the latter which contributes greatly to its own expansion widespread. It should also be noted that the study phase related to it is far from completed, since scientists believe they can also draw from it additional utilities at the application level.
The cellulose particles described are sensitive yes at solar radiationso much so that they address their own operation allowing savings on air conditioning, but they are also with reference to pollutants.
It’s a potential too precious, in fact, not to be exploited for a definitive version of the refrigeration films to be introduced on the market.
They might to integrate effectively, in addition to the air conditioning, also the work of smoke or smog detectors, which should be integrated directly into the surface of the cladding. Who knows that it will soon be found, as well as a means for the savings on the air conditioningalso to repel pollutants.
Source: LAVORINCASA.it by www.lavorincasa.it.
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