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The city in summer: a new concrete that stays coldWith increasingly abnormal temperatures and stifling summers, many solutions have been proposed to make life in cities viable. Vertical forests or urban cooling systems taking advantage of river water are some of them, and recently a group of Spanish researchers have found another: concrete that does not absorb heat . This is the European Miracle project coordinated by researchers from the Center for Materials Physics in San Sebastián. They have found a material that, instead of reaching 70 ºC as traditional concrete does in the hottest hours, remains between three and five degrees below ambient temperature. This is how extreme temperatures affect roads, dismantling the fried egg myth IN MOTORPASIÓN This is how extreme temperatures affect roads, dismantling the fried egg myth Almost half of the energy we consume comes from the buildings in which we live and work, and this amount of energy that we spend on conditioning them ends up condensed in the city in what are called urban heat islands .
In fact, the use of air conditioners represents 7% of global greenhouse gas emissions and 10% of total energy consumption. Therefore, finding materials that do not reproduce this effect is one of the researchers' objectives. This 'miracle' non-heating material, called radiative cooling cement , prevents solar radiation from penetrating the building in the middle of the day thanks to steel microfibers and porosity. In addition, they ensure that this Cell Phone Number List material can expel heat from buildings to outer space without any additional energy consumption since it reflects this energy in the form of infrared radiation. Dr. Jorge Sánchez Dolado's team, leading the research, was able to verify last summer that this material remains between three and five degrees below the ambient temperature even in the central hours of the hottest days, compared to the 60-70 °C that traditional concrete can reach, reports El Confidencial . Photonic metaconcrete innovation aims to dramatically contribute to the construction of near-zero energy buildings, but can also be expanded to multiple fields, such as solar cell technology or communication technologies.
For now, the researchers have patented the system and are seeking to create a new company to scale the product, which they claim has a price similar to that of traditional concrete. This summer a building in Vizcaya will be built with this miraculous material to monitor the results, which certainly seem promising.While the European Union Transport Commission ruled out limiting the use of private jets in 2023 , reports on CO₂ emissions try to draw attention to this major problem. The tourism sector generates around a tenth of greenhouse gas emissions; a situation that is getting worse with the increase in tourist demand that has been experienced this past summer (in addition to the indiscriminate use of private planes even to go defend the planet ). To address this situation, a tour operator called Intrepid Travel has proposed, after a study commissioned by the consulting firm The Future Laboratory, to create a carbon emissions passport that would limit the plane trips we make per year .
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发表于 2024-2-19 12:19:47