Hybrid concentrated radiative cooling and solar heating in a single system
Ooi, Boon S.
KAUST DepartmentElectrical Engineering Program
Physical Science and Engineering (PSE) Division
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/667372
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AbstractRadiative cooling is an emerging sustainable technology that does not require electricity to function. However, to realize sub-ambient cooling, the effects of the undesired incident solar energy must be minimized. Considering an ideal blackbody radiator at 300 K, the maximum cooling power density is 160 W/m2. Here, we report an architecture capable of overcoming this challenge by using two spectrally selective mirrors to simultaneously absorb the incident sunlight and re-direct the thermal emission from a vertically aligned emitter. With this configuration, both sides of the vertical emitter can be used together to realize a measured local cooling power density of over 270 W/m2 in a controlled laboratory environment. Under standard atmospheric pressure, we realized cooling that was 14C below the ambient temperature in the laboratory environment and a more than 12C temperature reduction in outdoor testing.
CitationZhou, L., Song, H., Zhang, N., Rada, J., Singer, M., Zhang, H., … Gan, Q. (2021). Hybrid concentrated radiative cooling and solar heating in a single system. Cell Reports Physical Science, 100338. doi:10.1016/j.xcrp.2021.100338
SponsorsThis work was supported by the National Science Foundation (CBET-1932968 and 1932843).
JournalCell Reports Physical Science
Except where otherwise noted, this item's license is described as This is an open access article under the CC BY-NC-ND license.