Accession Number:

AD1098551

Title:

Vo2-Based Switchable Radiator for Spacecraft Thermal Control

Descriptive Note:

Journal Article - Open Access

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC WASHINGTON United States

Report Date:

2019-08-05

Pagination or Media Count:

8.0

Abstract:

Direct calorimetric measurements of a solid state passive switchable radiator for spacecraft thermal control have been performed in a simulated space environment. Dynamic emissivity control is provided by the thermochromic phase change in a multilayer VO2 thin film based resonant absorber. The measured radiated power difference between 300 K and 373 K was 480 Wm2 corresponding to a 7x difference in radiative cooling power. We present theoretical and experimental radiator values for both normal and hemispherical as well the optical properties of VO2 as determined via infrared spectroscopic ellipsometry.

Subject Categories:

  • Air Conditioning, Heating, Lighting and Ventilating
  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE