Title: Systems and methods for radiative cooling and heating

Abstract

Systems and methods for radiative cooling and heating are provided. For example, systems for radiative cooling can include a top layer including one or more polymers, where the top layer has high emissivity in at least a portion of the thermal spectrum and an electromagnetic extinction coefficient of approximately zero, absorptivity of approximately zero, and high transmittance in at least a portion of the solar spectrum, and further include a reflective layer including one or more metals, where the reflective layer has high reflectivity in at least a portion of the solar spectrum.

Inventors:

Yu, Nanfang; Mandal, Jyotirmoy; Overvig, Adam; Shi, Norman Nan; Tian, Meng

Issue Date:

2022-04-19

Research Org.:

Brookhaven National Laboratory (BNL), Upton, NY (United States); Columbia Univ., New York, NY (United States)

Sponsoring Org.:

USDOE; National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR)

OSTI Identifier:

1892844

Patent Number(s):

11306949

Application Number:

16/451,807

Assignee:

The Trustees of Columbia University in the City of New York (New York, NY)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

F - MECHANICAL ENGINEERING F24 - HEATING F24S - SOLAR HEAT COLLECTORS

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B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

B32B2305/18 - Fabrics, textiles
B32B2305/30 - Fillers, e.g. particles, powders, beads, flakes, spheres, chips
B32B2307/30 - having particular thermal properties
B32B2307/416 - Reflective
B32B2311/24 - Aluminium
B32B2333/12 - Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
B32B2383/00 - Polysiloxanes
B32B2386/00 - Specific polymers obtained by polycondensation or polyaddition not provided for in a single one of index codes B32B2363/00 - B32B2383/00
B32B27/18 - characterised by the use of special additives
B32B27/283 - {comprising polysiloxanes}
B32B33/00 - Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings

F - MECHANICAL ENGINEERING F24 - HEATING F24S - SOLAR HEAT COLLECTORS

F24S10/40 - in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
F24S70/225 - for spectrally selective absorption
F24S70/30 - Auxiliary coatings, e.g. anti-reflective coatings
F24S70/60 - characterised by the structure or construction

F - MECHANICAL ENGINEERING F25 - REFRIGERATION OR COOLING F25B - REFRIGERATION MACHINES, PLANTS OR SYSTEMS

F25B23/003 - {using selective radiation effect}

F - MECHANICAL ENGINEERING F28 - HEAT EXCHANGE IN GENERAL F28F - DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION

F28F13/18 - by applying coatings, e.g. radiation-absorbing, radiation-reflecting
F28F2245/06 - having particular radiating, reflecting or absorbing features, e.g. for improving heat transfer by radiation

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E10/44 - Heat exchange systems

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DOE Contract Number:  

AC02-98CH10886; ECCS-1307948; FA9550-13-1-0389; PHY-1411445

Resource Type:

Patent

Resource Relation:

Patent File Date: 06/25/2019

Country of Publication:

United States

Language:

English