Journal
OPTO-ELECTRONIC ADVANCES
Volume 4, Issue 5, Pages -Publisher
CAS, INST OPTICS & ELECTRONICS, ED OFF OPTO-ELECTRONIC JOURNALS
DOI: 10.29026/oea.2021.200006
Keywords
phase change material; photonic crystal; passive thermoregulation; switchable radiative cooling; Fabry-Perot resonance
Categories
Funding
- Green Science program - POSCO
- National Research Foundation (NRF) - Ministry of Science and ICT, Republic of Korea [NRF2019R1A2C3003129, CAMM-2019M3A6B3030637, NRF-2019R1A5A8080 290, NRF-2018M3D1A1058997]
- Ministry of Education, Republic of Korea [NRF-2017H1A2A1043204]
- POSTECH
- Hyundai Motor Chung Mong-Koo Foundation
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This paper presents the design and simulation of a switchable radiative cooler that utilizes the phase transition in vanadium oxide to achieve temperature-responsive cooling. The feasibility of cooling is confirmed under real outdoor conditions, showing that the cooler can maintain the desired temperature even with changes in environmental conditions.
This paper presents design and simulation of a switchable radiative cooler that exploits phase transition in vanadium dioxide to turn on and off in response to temperature. The cooler consists of an emitter and a solar reflector separated by a spacer. The emitter and the reflector play a role of emitting energy in mid-infrared and blocking incoming solar energy in ultraviolet to near-infrared regime, respectively. Because of the phase transition of doped vanadium dioxide at room temperature, 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 a desired temperature, despite change in environmental conditions.
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