Invited Speaker

Assoc. Prof. Jinpeng Lv

Nanjing University of Aeronautics and Astronautics

E-mail: jinpenglv@nuaa.edu.cn

Title: Selective emitter based on photonic structure for terrestrial and space radiative cooling

Profile:

Jinpeng Lv, male, Doctor, Associate Professor at the college of Astronautics of NUAA, is mainly engaged in the development of aerospace thermal control coatings and their stability in the pace environment. He has hosted several scientific research projects such as the National Natural Science Foundation of China (NSFC) and the Field Fund, published more than 30 SCI papers, and the research results have been applied in aerospace model missions.

Abstract:

Passive radiative cooling offers a promising solution to achieve refrigeration and global carbon neutrality without energy consumption. Herein, photonic radiative cooler based on fluoride-metal multilayer stack structure are developed and their outdoor cooling performances are demonstrated. The as-designed selective emitters exhibit ideal spectral properties with reflectance up to 97.2% and atmospheric window emissivity up to 0.83. Field tests illustrate that the selective emitters have excellent all-day sub-ambient radiative cooling performance. The MgF2/Ag emitter shows more than 19 °C all-day sub-ambient cooling ability despite the season, demonstrating its superior cooling performance. Furthermore, the real-world application test shows that the MgF2/Ag cube cooler has a maximum of 14 °C cooling effect under sunlight and an average cooling effect of 2 °C during night. The porotype cooler provides an innovative strategy for achieving deep sub-ambient cooling and broad energy saving applications.