通过掺杂的 VO₂ 进行可切换的昼夜辐射冷却
ドープされたVO₂による切り替え可能な日中放射冷却
도핑된 VO₂에 의한 전환 가능한 주간 복사 냉각
Enfriamiento radiativo diurno conmutable por VO₂ dopado
Refroidissement radiatif diurne commutable par VO₂ dopé
Переключаемое суточное радиационное охлаждение легированным VO₂
Minkyung Kim ¹, Dasol Lee ¹, Younghwan Yang ¹, Junsuk Rho ¹ ²
¹ Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
² Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
This paper presents design and simulation of a switchable radiative cooler that exploits phase transition in vanadium di-oxide to turn on and off in response to temperature. The cooler consists of an emitter and a solar reflector separated by aspacer. The emitter and the reflector play a role of emitting energy in mid-infrared and blocking incoming solar energy inultraviolet to near-infrared regime, respectively.
Because of the phase transition of doped vanadium dioxide at room tem-perature, the emitter radiates its thermal energy only when the temperature is above the phase transition temperature. The feasibility of cooling is simulated using real outdoor conditions. We confirme that the switchable cooler can keep adesired temperature, despite change in environmental conditions.
