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Title: Concentrated radiative cooling and its constraint from reciprocity

Journal Article · · Optics Express
DOI: https://doi.org/10.1364/OE.445544 · OSTI ID:1842565

Concentrated radiative cooling, an analogous concept of the concentrated solar power technology, has the potential of amplifying both the cooling power and the temperature reduction. However, concentrators have not yet been systematically optimized. Moreover, a widely used theoretical approach to analyze such systems has neglected a fundamental constraint from reciprocity, which can lead to an overestimate of cooling performance and unclarified limits of amplification factors. Here we develop a theoretical framework addressing these shortcomings. Modeling suggests the optimized shape and geometric dimensions of concentrators, as well as the limiting cooling power and temperature reduction. Using an electroplated Al 2 O 3 emitter and an optimized conical concentrator, we experimentally amplify the nighttime radiative cooling by 26%.

Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-07ER46426
OSTI ID:
1842565
Journal Information:
Optics Express, Journal Name: Optics Express Journal Issue: 1 Vol. 30; ISSN 1094-4087; ISSN OPEXFF
Publisher:
Optical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English

References (31)

Thermal performance of radiative cooling panels journal June 1983
Thermal Photonics and Energy Applications journal October 2017
Simultaneously and Synergistically Harvest Energy from the Sun and Outer Space journal January 2019
Generating Light from Darkness journal November 2019
Thermal energy storage technologies and systems for concentrating solar power plants journal August 2013
Prospects and problems of concentrating solar power technologies for power generation in the desert regions journal January 2016
Cooling potential and applications prospects of passive radiative cooling in buildings: The current state-of-the-art journal November 2016
Novel non-concentrating solar collector for intermediate-temperature energy capture journal October 2014
Amplified radiative cooling via optimised combinations of aperture geometry and spectral emittance profiles of surfaces and the atmosphere journal September 2009
Hybrid concentrated radiative cooling and solar heating in a single system journal February 2021
Concentrating Solar Power journal August 2015
Axion-Field-Enabled Nonreciprocal Thermal Radiation in Weyl Semimetals journal February 2020
Harnessing Heat Beyond 200 °C from Unconcentrated Sunlight with Nonevacuated Transparent Aerogels journal June 2019
Ultrabroadband Photonic Structures To Achieve High-Performance Daytime Radiative Cooling journal March 2013
Potential for concentrating solar power to provide baseload and dispatchable power journal June 2014
Radiative cooling to deep sub-freezing temperatures through a 24-h day–night cycle journal December 2016
Investigation of phonon coherence and backscattering using silicon nanomeshes journal January 2017
Concentrating solar power: Still small but learning fast journal June 2017
Thermodynamic limits for simultaneous energy harvesting from the hot sun and cold outer space journal April 2020
Ideal spectral emissivity for radiative cooling of earthbound objects journal August 2020
A polydimethylsiloxane-coated metal structure for all-day radiative cooling journal August 2019
Harvesting renewable energy from Earth's mid-infrared emissions journal March 2014
Thermodynamic limits of energy harvesting from outgoing thermal radiation journal April 2018
Directional and Spectral Control of Thermal Emission and Its Application in Radiative Cooling and Infrared Light Sources journal June 2020
Intrinsic nonreciprocal reflection and violation of Kirchhoff's law of radiation in planar type-I magnetic Weyl semimetal surfaces journal October 2020
Near-complete violation of detailed balance in thermal radiation journal December 2014
Exploiting radiative cooling for uninterrupted 24-hour water harvesting from the atmosphere journal June 2021
Terrestrial radiative cooling: Using the cold universe as a renewable and sustainable energy source journal November 2020
Nighttime radiative cooling in hot and humid climates journal January 2019
Maximal nighttime electrical power generation via optimal radiative cooling journal January 2020
Directional radiation for optimal radiative cooling journal January 2021