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Tunable daytime passive radiative cooling based on a broadband angle selective low-pass filter

Title data

Pech-May, Nelson W. ; Retsch, Markus:
Tunable daytime passive radiative cooling based on a broadband angle selective low-pass filter.
In: Nanoscale Advances. Vol. 2 (2020) Issue 1 . - pp. 249-255.
ISSN 2516-0230
DOI: https://doi.org/10.1039/c9na00557a

Official URL: Volltext

Abstract in another language

Passive daytime cooling could contribute to the reduction of our global energy consumption. It is capable
of cooling materials down to below ambient temperatures without the necessity of any additional input
energy. Yet, current devices and concepts all lack the possibility to switch the cooling properties on and
off. Here, we introduce dynamic control for passive radiative cooling during daytime. Using an angle-
selective solar filter on top of a nocturnal passive radiator allows tuning the surface temperature of the latter in a wide range by just tilting the filter from normal incidence up to around 23°. This angle-selective filter is based on optically engineered, one-dimensional photonic crystal structures. We use numerical simulations to investigate the feasibility of a switchable low-pass filter/emitter device.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: passive cooling; angle-selective transmission; Bragg stack; Infrared transparent
nanophotonics
Institutions of the University: Profile Fields > Advanced Fields > Polymer and Colloid Science
Profile Fields > Advanced Fields > Advanced Materials
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG
Research Institutions > EU Research Projects > VISIRday
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Emerging Fields
Research Institutions
Research Institutions > Research Centres
Research Institutions > EU Research Projects
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 23 May 2020 21:00
Last Modified: 27 May 2020 11:07
URI: https://eref.uni-bayreuth.de/id/eprint/55212