Researchers at Hokkaido University have developed a novel approach using cerium oxide (CeO2) as an active material in thermal switches, enhancing their efficiency and sustainability. CeO2 thin films effectively control heat transfer, showcasing remarkable performance. This innovation addresses the challenges of waste heat recovery and energy efficiency in various applications.
The thermal conductivity in its minimal state is 2.2 W/m·K, but significantly rises to 12.5 W/m·K in in the oxidized state .
Two-thirds of the energy generated from fossil fuels like coal and oil is wasted as heat. Thermal management systems such as thermal diodes and thermal transistors can help recover this heat and put it to use instead. Not only does this increase the cost of manufacturing, but it also requires extensive mining to source them. Moreover, thermal switches developed using these materials also deliver suboptimal performance, limiting their large-scale deployment.
Additionally, it also improves the performance efficiency of the switch, which makes it a much-preferred approach to making electrical switches in the future. “The novel device features an on/off thermal conductivity ratio of 5.8 and a thermal conductivity -switching width of 10.3 W/m·K, establishing a new benchmark for electrochemical thermal switches,” explained Ohta in a press release.
THERMALSWITCHES CERIUMOXIDE WASTEHEATRECOVERY ENERGYEFFICIENCY SUSTAINABLETECHNOLOGY
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