Ma, Su-ShengSu-ShengMaTseng, Ching-YiChing-YiTsengYang, Tai-HerTai-HerYangSIH-LI CHEN2025-08-142025-08-142025-09https://www.scopus.com/record/display.uri?eid=2-s2.0-105010308680&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/731446This study developed a household thermoelectric dehumidification system that integrates a cold-air recirculation mechanism with an inclined cold-side fin assembly to enhance condensation efficiency and energy performance in small indoor environments. The system redirects cold air from the cold-side fin assembly back toward the hot-side fin assembly by using a fan, thereby assisting with heat dissipation and enhancing condensation. Droplet shedding and continuous surface renewal can be ensured by tilting the cold-side fin assembly to a specific angle and integrating it with a recirculation flow channel. Experiments conducted using fin inclination angles of 0°–90° revealed that optimal thermal performance and dehumidification performance were achieved at a fin inclination of 52° The proposed system achieved a maximum dehumidification rate of 432 g/day, representing a 44 % improvement over that achieved by a commercial thermoelectric dehumidification system. Moreover, the energy consumption of the proposed system was approximately 17 % lower than that of the commercial system. These results confirm that the proposed system can serve as an energy-efficient and environmentally friendly dehumidification solution for compact indoor environments.Cold energy recoveryEnergy-saving dehumidificationTilted condensation[SDGs]SDG6[SDGs]SDG7journal article10.1016/j.rineng.2025.1061532-s2.0-105010308680