The development of projects has been greatly reduced, the super large shopping center has been divided into three, and the air conditioning system has to be reassessed
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Although the use process does not consume resources, the coating can not be called perfect in the production process
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Every summer, people thank Willis carrier
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In other words, the paint you brush for environmental protection will cause certain environmental pollution
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Builders can widely use this kind of coating
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If the plan goes well, this is the future city of Dubai
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Dubai, United Arab Emirates, wants to build an air-conditioned city in 2014, so that urban residents can stay “indoors” all year round, because the city has air conditioning everywhere
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The principle of using light color paint to cool buildings is to reflect light, so the shallower the building paint, the better the effect
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Discussion overheat is easy to go to extremes, overheated weather is easy to heatstroke, and high temperature may even lead to human dizziness and death
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They make the road curing agent white and reduce the ground temperature by reflecting more light
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No one wants to go out and see a vast expanse of white
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In a word, the whole city air conditioning plan is completely unworkable
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The higher the albedo of the coating, the better it is for building temperature control
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With appropriate temperature and good configuration facilities in the city, Dubai is expected to receive 180 million tourists a year after setting the plan of temperature controlled city
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Although this is not a snow field and may not cause snow blindness, light reflection will also cause new problems
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Paint the city white and everything will be all right? Coating the surface of buildings with a layer of light color paint can reflect and shield the radiation of sunlight, so as to cool the city, which is a common method in urban architectural design
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Recently, the further upgraded white paint was re launched
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However, this plan sounds less environmentally friendly
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What is more effective than white paint? The effect of white paint is the best
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Some people also want to transform the urban road surface to make the “main road facing the sky to cool and reduce heat”
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In addition to its high albedo, this new coating can better reflect solar radiation back into space at a specific infrared wavelength of 0.008-0.013mm, rather than staying in the earth’s atmosphere to exacerbate global warming
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This kind of difficult solution must be faced by today’s environmental protection work
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Two kinds of coatings that constantly refresh the “whitest” record are improved on the basis of inorganic titanium dioxide
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Today’s world is “hot”
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Planting all kinds of greening plants on the roof and exterior wall can also help the building absorb heat and block the sunlight, but such design may also have a certain impact on the service life of the building
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Although it is not as effective as the new white paint, it is also helpful
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In addition to the hustle and bustle of the Internet world, there is also a heat wave in the real world
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If the plan of urban air conditioning is very large, the plan of portable air conditioning is very small
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The final solution is very traditional, that is to make the buildings more dense, provide residents with more shaded sidewalks, and increase the path choice of walking through the buildings
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When Willis carrier, the inventor of air conditioning, wants to cool the city, air conditioning is also the first choice, but not all cities can afford it
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At that time, the city of Dubai will be connected by more than 6.5 kilometers of closed corridors, with different buildings connected to each other
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The plan of the United Arab Emirates is to build Dubai into the first temperature controlled city, where tourists can feel the constant temperature life all year round
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Shanghai issued the first high temperature yellow warning, and the maximum temperature will reach 35 degrees Celsius
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Imperfect solution and continuous high-temperature struggle
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In addition to the consideration of economic cost, the design of architectural appearance is also a problem
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It is one of the best urban cooling solutions at present
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But the price of 1600 is not acceptable to everyone
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Researchers at Purdue University have previously launched the world’s whitest paint, which is made of calcium carbonate and has an albedo of 95%
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Portable air conditioners and air-conditioned cities belong to only a small number of people
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Coupled with many factors such as the decline of oil prices, the grand urban transformation plan has been cut down again and again
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Therefore, most of the modern buildings we see are light color, which is not only for beauty, but also for practicality
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There is also a greening rate outside the building, and the new cooling scheme is not limited to buildings
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The highest temperature in Antarctica broke another record
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The highest temperature in Canada approaches 50 ℃, and the death toll surges
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All buildings are connected to each other and air conditioners are everywhere
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Residents no longer need to feel the heat wave in summer, because the city is basically covered by air conditioning, and there are few outdoor without air conditioning
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Two thirds of the raw materials of this coating come from ore, which means that mining is needed to be widely used – which is one of the human behaviors that have a great impact on the environment
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In fact, there are not many attempts to use their brains to cool down urban buildings
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However, this curing agent will also reduce the skid resistance of the road to a certain extent and affect the driving safety.
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Its existence allows people walking in the street to blow moist hot air on their faces, while the portable air conditioner on their back hides in their suits to create gratifying air conditioning
White building
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Looking at more and more solutions, in addition to energy conservation and emission reduction and reducing carbon emissions, people have not found a cooling solution that can benefit more people
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As an inventor, he was not as famous as Edison, but the air conditioner he invented made countless people feel stable happiness in summer
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The reonpocket refrigerated on the cervical spine also makes people worry about periarthritis of the shoulder
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Coo Morgan Parker, the Dubai holding company in charge of the project, told Bloomberg in 2016: installing air conditioners in the whole project is not only economically feasible, but also not responsible for the environment
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Reonpocket is like a portable air conditioner attached to the cervical spine, but recently researchers at Purdue University have proposed a new solution – painting the city white
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Charleston County, South Carolina, USA, has tried this method
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Sony’s reonpocket portable air conditioner has reached the second generation
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It is made of high concentration barium sulfate, which not only makes the color whiter, but also has better albedo effect
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As a common raw material in commercial white coatings, titanium dioxide has a good UV masking effect and is a “sunscreen” for textile fibers and cosmetics
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In the actual test, the indoor temperature of the building using this coating is 4.5 ℃ lower than the outdoor temperature
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It can be said that this coating is like a resource-free “building air conditioner”, which can still be used continuously
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Picture from Simon_ M and it is unrealistic to apply this coating to all buildings
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The paper shows that when the sun shines on this specific white coating, nearly 10% of the radiation will be reflected by these wavelengths
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Coating buildings with light color paint is one of them
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In addition, it is not difficult to “whiten” buildings, and there is no need for electricity in the process of coating work, which will not cause more harm to the environment
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Do you want a pure white building? Picture from Simon_ M when the albedo of the white coating made of titanium dioxide is 90% – 92%, the albedo of the latest white coating is about 98%, which has made great progress in terms of the functionality of the coating
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In order to cool down, cities and people also need to make some changes
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The author discusses that the cooling efficiency of the new coating is higher
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In the process of use, the aging of coatings and the decline of work efficiency are also factors to be considered
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In winter, the roof of the corridor can still be opened, and residents can continue to enjoy fresh air
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The old method is to whiten the road, but to whiten the road, we have to consider the safety of the road and the durability of the paint
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