Science, Space and Technology News 2024
Illustration of the experimental thermal trap. It consists of a quartz rod and a ceramic absorber . Solar radiation enters at the front, heat is generated in the rear area. Credit: Casati E et al. Device 2024, editednstead of burning coal or oil for this purpose.
In their lab-scale experiments, the team used a quartz rod measuring 7.5 centimeters in diameter and 30 centimeters in length. They exposed it to artificial light with an intensity equivalent to 135 times that of sunlight, reaching temperatures of up to 1050 degrees Celsius. Previous studies by other researchers have achieved a maximum of 170 degrees with such thermal traps.
The main component of the thermal trap is a cylinder made of quartz. In the experiments, it reached a temperature of 1050 degrees Celsius and glowed at this heat. Credit: ETH Zurich / Emiliano Casati Large-scale solar concentrating technologies are already established at an industrial scale for solar power generation, for example in Spain, the US, and in China. These plants typically operate at up to 600 degrees. At higher temperatures, heat loss by radiation increases and reduces the efficiency of the plants. A major advantage of the thermal trap developed by ETH Zurich researchers is that it minimizes radiative heat losses.
Reference: “Solar thermal trapping at 1,000°C and above” by Emiliano Casati, Leo Allgoewer and Aldo Steinfeld, 15 May 2024,SciTechDaily: Home of the best science and technology news since 1998. Keep up with the latest scitech news via email or social media.
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