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Solar heating technology could be key to low-emission cement

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Solar heating technology could be key to low-emission cement

作者: Release Date: 2019-12-13 Author: Click:

American company Heliogen has managed to concentrate solar energy to temperatures above 1,000 degrees Celsius-hot enough to provide fossil fuel-free concrete manufacturing methods.


呼和浩特蓄水池 从而产生超高热量,该技术被称为“多英亩放大镜”。 The company uses precisely aligned mirror arrays to focus sunlight onto a single target, and the Hohhot cistern generates ultra-high heat, a technique known as a "multi-acre magnifier."


Its breakthrough means that in the future solar energy can be used in industrial processes that currently need to burn fossil fuels.


The most important of these is the production of cement, which requires high temperatures to form composites from a mixture of limestone, chalk and slate, and then grind them into powder. Helogen uses ultra-aligned mirror arrays to generate ultra-high temperatures. Focus sunlight on a single target

As a key component of concrete, cement emissions account for about 8% of global greenhouse gas emissions, leading architects to call for alternative materials.


But Heliogen's technology reduces the carbon footprint of concrete by producing the ultra-high heat required for production through sunlight. However, about 50% of the CO2 emissions from cement come from chemical reactions that convert calcium carbonate to calcium hydroxide, so these pollutants will remain.


The company's founder and CEO, Bill Gross, said Heliogen technology represents "an opportunity to make a meaningful contribution to solving the climate crisis."


"We have made great strides in deploying clean energy in the power system," he said. "But electricity accounts for less than a quarter of global energy demand." "Heliogen represents a technological leap forward and can meet another 75% Energy demand: use of fossil fuels in industrial processes and transportation. "

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The company names steel and petrochemicals as two other industrial processes it has the potential to power.


Heliogen's patented system relies on a computer-controlled array of mirrors to accurately guide mirrors to nearby towers and targets on receivers. According to Heliogen, the sunlight captured by the mirror is equivalent to more than 1,200 suns.


Heliogen intends to use the technology to create two products. 呼和浩特化粪池 例如水泥生产,这被称为HelioHeat。 It plans to use solar energy for industrial production, Hohhot septic tanks such as cement production, which is called HelioHeat. But it also hopes to be able to use the technology to create its own clean fuel brand, HelioFuel.

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Gates said Heliogen technology "is a promising development in replacing fossil fuels in one day."


"Today, industrial processes used to make cement, steel, and other materials account for more than a fifth of total emissions," Gates said. "These materials are ubiquitous in our lives, but we don't Any proven breakthrough will not provide us with an affordable zero-carbon version. "


"If we want to achieve zero carbon emissions overall, we still have a lot of work to do."


By combining Heliogen's solar thermal energy with the adjustment of chemical processes, the carbon emissions of concrete can be further reduced, such as the carbon capture technology proposed by MIT and the nanoplatelets enhanced from carrots by Lancaster University.


However, some architects and experts believe that climate emergencies do not have time to take incremental measures and that the industry should shift to more sustainable materials such as wood.

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URL of this article: http://fs-nanguo.com/news/539.html

Keywords: solar energy , reservoir characteristics , reservoir

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