US 12,281,862 B2
Dual-mode heating and cooling devices and related systems and methods
Pochun Hsu, Durham, NC (US); and Xiuqiang Li, Durham, NC (US)
Assigned to Duke University, Durham, NC (US)
Appl. No. 17/780,657
Filed by Duke University, Durham, NC (US)
PCT Filed Dec. 2, 2020, PCT No. PCT/US2020/062851
§ 371(c)(1), (2) Date May 27, 2022,
PCT Pub. No. WO2021/113332, PCT Pub. Date Jun. 10, 2021.
Claims priority of provisional application 62/942,257, filed on Dec. 2, 2019.
Prior Publication US 2023/0020511 A1, Jan. 19, 2023
Int. Cl. F28F 13/18 (2006.01); F25B 27/00 (2006.01); F25B 29/00 (2006.01)
CPC F28F 13/18 (2013.01) [F25B 27/002 (2013.01); F25B 29/00 (2013.01); F24D 2200/14 (2013.01); Y02B 10/20 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A dual-mode heating and cooling system comprising:
a dual-mode heating and cooling device comprising a cooling part and a heating part that are configured to be selectively exposed to sunlight in a cooling mode and a heating mode, respectively, the cooling part configured to provide radiative cooling to a structure, the heating part configured to provide solar heating to the structure,
wherein the device comprises a film with the cooling part and the heating part side-by-side on the film.
 
13. A method for dual-mode heating and cooling of a structure, the method comprising:
providing a dual-mode heating and cooling device comprising a cooling part and a heating part that are configured to be selectively exposed to sunlight in a cooling mode and a heating mode, respectively, the cooling part configured to provide radiative cooling to a structure, the heating part configured to provide solar heating to the structure, wherein the device comprises a film with the cooling part and the heating part side-by-side on the film;
cooling a structure to which the device is coupled in the cooling mode;
heating the structure in the heating mode; and
automatically switching between the cooling and heating steps multiple times in response to a measured outside temperature.