US 12,222,169 B2
Devices and methods for radiative cooling
Nanfang Yu, Fort Lee, NJ (US); Norman Shi, San Jose, CA (US); and Meng Tian, Fort Lee, NJ (US)
Assigned to The Trustees of Columbia University in the City of New York, New York, NY (US)
Filed by THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK, New York, NY (US)
Filed on Jun. 1, 2023, as Appl. No. 18/327,184.
Application 18/327,184 is a division of application No. 16/793,668, filed on Feb. 18, 2020, granted, now 11,703,289.
Application 16/793,668 is a continuation of application No. PCT/US2018/000277, filed on Aug. 15, 2018.
Claims priority of provisional application 62/545,909, filed on Aug. 15, 2017.
Prior Publication US 2024/0011724 A1, Jan. 11, 2024
Int. Cl. D06M 11/00 (2006.01); B82Y 30/00 (2011.01); D01D 1/06 (2006.01); D01D 1/10 (2006.01); D01D 5/06 (2006.01); D01D 5/16 (2006.01); D01D 5/247 (2006.01); D01F 1/04 (2006.01); D01F 1/06 (2006.01); D01F 1/10 (2006.01); D01F 2/00 (2006.01); D01F 4/02 (2006.01); D01F 6/12 (2006.01); F28F 13/00 (2006.01); G02B 6/10 (2006.01)
CPC F28F 13/003 (2013.01) [B82Y 30/00 (2013.01); D01D 1/06 (2013.01); D01D 1/106 (2013.01); D01D 5/06 (2013.01); D01D 5/16 (2013.01); D01D 5/247 (2013.01); D01F 1/04 (2013.01); D01F 1/06 (2013.01); D01F 1/106 (2013.01); D01F 2/00 (2013.01); D01F 4/02 (2013.01); D01F 6/12 (2013.01); D06M 11/00 (2013.01); G02B 6/10 (2013.01); D10B 2401/022 (2013.01); D10B 2401/22 (2013.01); D10B 2403/02421 (2013.01); F28F 2245/06 (2013.01); Y10T 428/25 (2015.01); Y10T 428/2915 (2015.01)] 16 Claims
OG exemplary drawing
 
1. A method for radiative cooling of an object positioned thereunder, comprising:
providing a fabric including one or more fibers extending for a length in a longitudinal direction; and
introducing a plurality of void structures to each of the one or more fibers, wherein the plurality of void structures are configured to at least a portion of electromagnetic radiation received thereon in a transverse direction of the one or more fibers, wherein the plurality of void structures are configured to propagate the electromagnetic radiation in a longitudinal direction of the one or more fibers to thereby radiatively cool the object, wherein the one or more fibers are configured to have the plurality of void structures in a density between about 2.2 voids/μm2 and about 17 voids/μm2 to enhance a solar reflectivity in visible and near-infrared spectrums.