公开(公告)号：US20220307730A1

公开(公告)日：2022-09-29

申请号：US17703113

申请日：2022-03-24

Applicant: Purdue Research Foundation

Inventor： Xiulin Ruan ,  Joseph Arthur Peoples

IPC: F24S23/74 ,  F24S23/70 ,  F24S10/70 ,  F24S20/25 ,  F24S40/55 ,  F24F5/00

Abstract: Devices and methods for concentrated radiative cooling using radiative cooling coatings in combination with mid-infrared reflectors. Concentrated radiative cooling (CRC) devices include an object to be cooled that is coated with a radiative cooling material and a mid-infrared (mid-IR) reflector configured to reflect thermal energy radiated from a surface of the object to deep space. The object may be nested in a mid-IR reflective trough such that substantially an entirety of the object's surface area contributes to radiative cooling. The radiative cooling material may be a coating such as a paint or film that is applied directly to the object's exterior surfaces to reduce thermal resistances. The radiative cooling coating is configured to lose thermal energy from the object by means of exhibiting high emissivity for wavelengths of 8 to 13 micrometers, and in some arrangements of 5 to 30 micrometers.

公开(公告)号：US20240368411A1

公开(公告)日：2024-11-07

申请号：US18774135

申请日：2024-07-16

Applicant: Purdue Research Foundation

Inventor： Xiulin Ruan ,  Xiangyu Li ,  Zhifeng Huang ,  Joseph Arthur Peoples

IPC: C09D5/33 ,  B05D1/28 ,  C08K3/22 ,  C08K3/26 ,  C08K3/30 ,  C09D7/40 ,  C09D7/61

Abstract: Metal-free compositions for solar-reflective infrared-emissive coatings and methods of producing the same. The paints are suitable for reducing the temperatures of objects below ambient temperatures between sunset and sunrise (nighttime) and part or full daytime (between sunrise and sunset) when such objects are subjected to direct sunlight. Such a solar-reflective infrared-emissive paint may include a particle-polymer composite containing particles in a polymeric matrix, wherein the particles are nanoparticles or microparticles, the paint does not contain a metallic component, and the paint exhibits high reflectance for the solar spectrum wavelengths of 0.3 to 3 micrometers and high emissivity for wavelengths of 8 to 13 micrometers.

公开(公告)号：US20210403726A1

公开(公告)日：2021-12-30

申请号：US17282958

申请日：2019-10-03

Applicant: Purdue Research Foundation

Inventor： Xiulin Ruan ,  Xiangyu Li ,  Zhifeng Huang ,  Joseph Arthur Peoples

IPC: C09D5/33 ,  C09D7/40 ,  C09D7/61 ,  B05D1/28

Abstract: Metal-free compositions for solar-reflective infrared-emissive coatings and methods of producing the same. The paints are suitable for reducing the temperatures of objects below ambient temperatures between sunset and sunrise (nighttime) and part or full daytime (between sunrise and sunset) when such objects are subjected to direct sunlight. Such a solar-reflective infrared-emissive paint may include a particle-polymer composite containing particles in a polymeric matrix, wherein the particles are nanoparticles or microparticles, the paint does not contain a metallic component, and the paint exhibits high reflectance for the solar spectrum wavelengths of 0.3 to 3 micrometers and high emissivity for wavelengths of 8 to 13 micrometers.