氧化镓肖特基势垒二极管与热电模块集成用于热能回收和主动冷却

Abstract The importance of energy conversion and thermal management in power devices has driven researches toward high conversion efficiency and effective heat dissipation. This work integrates beta-phase gallium oxide ( β -Ga 2 O 3 ) Schottky Barrier Diodes (SBDs) on a thermoelectric module (TEM), enabling the bidirectional operation modes of heat recovery and active cooling utilizing theoretical and experimental methods. Results show that enhancing the heat exchange coefficient can significantly improve the performance of the TEM. For thermoelectric generator (TEG), the maximum net output power and net conversion efficiency increased by 0.82 W and 3.2 %, respectively, corresponding to considerable improvements of approximately 6.7 and 2.6 times compared with the natural convection condition. For thermoelectric cooler (TEC), the coefficient of performance (COP) increased from 2.88 to 3.52 by accounting for the improved output power of the SBD, indicating a 22.2 % improvement. Theoretical analysis reveals that the height of thermoelectric (TE) legs leads to peaks in output power for the TEG and cooling capacity for the TEC, while the conversion efficiency of the TEG shows an inverse trend relative to the COP of the TEC. Additionally, increasing the height of the fins and the heat exchange coefficient further enhances the performance of the TEM by enlarging temperature gradient. This work presents a new technique for improving energy efficiency and thermal performance of β -Ga 2 O 3 SBDs.