Microwave-induced high-energy sites and targeted energy transition promising for efficient energy deployment
Received date: 13 Feb 2021
Accepted date: 02 Jun 2021
Published date: 15 Dec 2022
Copyright
Diverse interactions between microwaves and irradiated media provide a solid foundation for identifying novel organization pathways for energy flow. In this study, a high-energy-site phenomenon and targeted-energy transition mechanism were identified in a particular microwave heating (MH) process. Intense discharges were observed when microwaves were imposed on irregularly sized SiC particles, producing tremendous heat that was 8-fold the amount generated in the discharge-free case. Energy efficiency was thereby greatly improved in the electricity-microwaves-effective heat transition. Meanwhile, the dispersed microwave field energy concentrated in small sites, where local temperatures could reach 2000°C– 4000°C, with the energy density reaching up to 4.0 × 105 W/kg. This can be called a high-energy site phenomenon which could induce further processes or reactions enhancement by coupling effects of heat, light, and plasma. The whole process, including microwave energy concentration and intense site-energy release, shapes a targeted-energy transition mechanism that can be optimized in a controlled manner through morphology design. In particular, the discharge intensity, frequency, and high-energy sites were strengthened through the fabrication of sharp nano/microstructures, conferring twice the energy efficiency of untreated metal wires. The microwave-induced high-energy sites and targeted energy transition provide an important pathway for high-efficiency energy deployment and may lead to promising applications.
Jing SUN , Guanqun YU , Kui AN , Wenlong WANG , Biao WANG , Zhenyu JIANG , Chenggong SUN , Yanpeng MAO , Xiqiang ZHAO , Zhanlong SONG . Microwave-induced high-energy sites and targeted energy transition promising for efficient energy deployment[J]. Frontiers in Energy, 2022 , 16(6) : 931 -942 . DOI: 10.1007/s11708-021-0771-y
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