Contactless and spatially structured cooling by directing thermal radiation

Abstract In recent years, radiative cooling has become a topic of considerable interest for applications in the context of thermal building management and energy saving. The idea to direct thermal radiation in a controlled way to achieve contactless sample cooling for laboratory applications, howeve...

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Autores principales:	Nicola M. Kerschbaumer, Stefan Niedermaier, Theobald Lohmüller, Jochen Feldmann
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f0cc5aa1a5c5408680a4f157a8b637d3
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spelling	oai:doaj.org-article:f0cc5aa1a5c5408680a4f157a8b637d32021-12-02T16:28:51ZContactless and spatially structured cooling by directing thermal radiation10.1038/s41598-021-95606-22045-2322https://doaj.org/article/f0cc5aa1a5c5408680a4f157a8b637d32021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95606-2https://doaj.org/toc/2045-2322Abstract In recent years, radiative cooling has become a topic of considerable interest for applications in the context of thermal building management and energy saving. The idea to direct thermal radiation in a controlled way to achieve contactless sample cooling for laboratory applications, however, is scarcely explored. Here, we present an approach to obtain spatially structured radiative cooling. By using an elliptical mirror, we are able to enhance the view factor of radiative heat transfer between a room temperature substrate and a cold temperature landscape by a factor of 92. A temperature pattern and confined thermal gradients with a slope of ~ 0.2 °C/mm are created. The experimental applicability of this spatially structured cooling approach is demonstrated by contactless supercooling of hexadecane in a home-built microfluidic sample. This novel concept for structured cooling yields numerous applications in science and engineering as it provides a means of controlled temperature manipulation with minimal physical disturbance.Nicola M. KerschbaumerStefan NiedermaierTheobald LohmüllerJochen FeldmannNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nicola M. Kerschbaumer Stefan Niedermaier Theobald Lohmüller Jochen Feldmann Contactless and spatially structured cooling by directing thermal radiation
description	Abstract In recent years, radiative cooling has become a topic of considerable interest for applications in the context of thermal building management and energy saving. The idea to direct thermal radiation in a controlled way to achieve contactless sample cooling for laboratory applications, however, is scarcely explored. Here, we present an approach to obtain spatially structured radiative cooling. By using an elliptical mirror, we are able to enhance the view factor of radiative heat transfer between a room temperature substrate and a cold temperature landscape by a factor of 92. A temperature pattern and confined thermal gradients with a slope of ~ 0.2 °C/mm are created. The experimental applicability of this spatially structured cooling approach is demonstrated by contactless supercooling of hexadecane in a home-built microfluidic sample. This novel concept for structured cooling yields numerous applications in science and engineering as it provides a means of controlled temperature manipulation with minimal physical disturbance.
format	article
author	Nicola M. Kerschbaumer Stefan Niedermaier Theobald Lohmüller Jochen Feldmann
author_facet	Nicola M. Kerschbaumer Stefan Niedermaier Theobald Lohmüller Jochen Feldmann
author_sort	Nicola M. Kerschbaumer
title	Contactless and spatially structured cooling by directing thermal radiation
title_short	Contactless and spatially structured cooling by directing thermal radiation
title_full	Contactless and spatially structured cooling by directing thermal radiation
title_fullStr	Contactless and spatially structured cooling by directing thermal radiation
title_full_unstemmed	Contactless and spatially structured cooling by directing thermal radiation
title_sort	contactless and spatially structured cooling by directing thermal radiation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f0cc5aa1a5c5408680a4f157a8b637d3
work_keys_str_mv	AT nicolamkerschbaumer contactlessandspatiallystructuredcoolingbydirectingthermalradiation AT stefanniedermaier contactlessandspatiallystructuredcoolingbydirectingthermalradiation AT theobaldlohmuller contactlessandspatiallystructuredcoolingbydirectingthermalradiation AT jochenfeldmann contactlessandspatiallystructuredcoolingbydirectingthermalradiation
_version_	1718383968787628032

Contactless and spatially structured cooling by directing thermal radiation

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