MLI Blanket Effective Emittance Variance and its Effect on Spacecraft Propellant Line Thermal Control

Date
2016-07-10
Journal Title
Journal ISSN
Volume Title
Publisher
46th International Conference on Environmental Systems
Abstract

Multi-Layer Insulation (MLI) blankets commonly employed for temperature control of spacecraft propellant lines consistently show large variances in their effective emittances. These variances are primarily due to workmanship, hence hard to control or predict. Unfortunately, these are also the primary drivers of propellant line temperatures, thus leading to large predicted temperature uncertainties and increased risks to the success of space missions.

JPL gained significant knowledge of these variances from Mars heritage spacecraft designs for more than two decades. This knowledge led to improved analytical approaches to bound existing designs, emphasis on increased temperature visibility for design verification and model correlation, as well as methods for improving their robustness.

Description
United States
NASA JPL
Jet Propulsion Laboratory
101
ICES101: Spacecraft and Instrument Thermal Systems
Vienna, Austria
Jennifer R. Miller, Jet Propulsion Laboratory, California Institute of Technology, USA
Pradeep Bhandari, Jet Propulsion Laboratory, California Institute of Technology, USA
Keith Novak, Jet Propulsion Laboratory, California Institute of Technology, USA
Jacqueline Lyra, Jet Propulsion Laboratory, California Institute of Technology, USA
The 46th International Conference on Environmental Systems was held in Vienna, Austria, USA on 10 July 2016 through 14 July 2016.
Keywords
MLI, Propellant Lines, Thermal Control
Citation