Passive Radiative Cooling Panels for Lunar Daytime Equipment Temperature Control

This study sizes passive radiative cooling panels operating in lunar daylight: a panel at 300 kelvin emits 436 watts per square metre, absorbs 109 watts of sunlight at the stated absorptance, and after a stated regolith infrared load delivers a net cooling flux of 267 watts per square metre, so a 10 kilowatt cooling duty needs 37 square metres. Sizing follows from computed thermal budgets derived in the study. This is a computed study with no targeting or weapon application. The work is simulated and computed from stated assumptions, not measured.