Concentrated Radiative Cooling
Abstract
A fundamental limit of current radiative cooling systems is that only the top surface facing deep-space can provide the radiative cooling effect, while the bottom surface cannot. Here, we propose and experimentally demonstrate a concept of "concentrated radiative cooling" by nesting a radiative cooling system in a mid-infrared reflective trough, so that the lower surface, which does not contribute to radiative cooling in previous systems, can radiate heat to deep-space via the reflective trough. Field experiments show that the temperature drop of a radiative cooling pipe with the trough is more than double that of the standalone radiative cooling pipe. Furthermore, by integrating the concentrated radiative cooling system as a preconditioner in an air conditioning system, we predict electricity savings of in Phoenix, AZ, and in Reno, NV, for a single-story commercial building.
Cite
@article{arxiv.2010.02426,
title = {Concentrated Radiative Cooling},
author = {Joseph Peoples and Yu-Wei Hung and Xiangyu Li and Daniel Gallagher and Nathan Fruehe and Anil Yuksel and James Braun and Travis Horton and Xiulin Ruan},
journal= {arXiv preprint arXiv:2010.02426},
year = {2020}
}