A5093726989- Thermal Radiation and Cooling Technologies
- Heat Transfer and Optimization
- Quantum Electrodynamics and Casimir Effect
- Advanced Thermodynamics and Statistical Mechanics
- Urban Heat Island Mitigation
- Gas Dynamics and Kinetic Theory
- Radiative Heat Transfer Studies
Princeton University
2024
Institut National des Sciences Appliquées de Lyon
2024
This study explores the optical design of a daytime radiative cooler with near-ideal solar reflectance and longwave infrared (LWIR) emittance through materials selection nanostructuring. Focusing on polymers as platform, we introduce bilayer architecture, comprising porous poly(vinylidene fluoride-co-hexafluoropropene) (P(VdF-HFP)) topcoat that serves low-index LWIR emissive effective medium, over nanofibrous, scattering polytetrafluoroethene underlayer. novel configuration yields superwhite...
We demonstrate a micropatterned directional emitter ({\mu}DE) with an ultrabroadband, azimuthally selective and tailorable emittance across the thermal wavelengths over wide angles. The {\mu}DE can enable novel passive seasonal thermoregulation of buildings by reducing summertime terrestrial radiative heat gain, wintertime loss. show several types {\mu}DE, such as metallic white variants, made using low-cost materials scalable manufacturing techniques that are already in large-scale use....
A spheroidal microlens array is patterned on infrared transparent substrates to control the polar transmission and reflection of broadband thermal radiation. Geometric parameters materials can be altered tune angular transmittance. Our design promising for controlling emissions radiative cooling applications.