Wrapped-IMLI: Thermal Insulation for Cryogenic Feed Lines, Phase I

Metadata Updated: May 2, 2019

NASA Exploration vehicles require improved technologies for passive thermal insulation for zero boil-off of cryopropellants during extended LEO and lunar surface missions. Vehicles such as the Earth Departure Stage and Orion must be capable of multi-day orbital operation with minimal cryopropellant loss, and the Altair Lunar Lander must have minimal cryopropellant loss over a six month mission on the lunar surface. Quest Product Development, teaming with Ball Aerospace, proposes an innovative advanced insulation system, Wrapped-IMLI, which could provide high performance thermal insulation for cryogenic feed lines.

Wrapped-IMLI is a multi-layer system using proprietary micromolded polymer spacers to precisely control layer spacing and reduce inter-layer heat conduction. IMLI versions of this concept, for cryotanks, have been proven with a measured thermal conductivity of 8.8*10-5 W/m-K, 37% lower heat leak than conventional MLI. Preliminary research indicates W-IMLI could provide excellent thermal insulation for cryo-feed lines.

Propellant boil-off losses are directly influenced by the MLI, which is the biggest heat leak in cryogenic propellant storage. It is known that MLI insulation for cryogenic propellant feed lines is much less effective than MLI for tank insulation. A Ball Defense Program study indicates the heat leak through spiral-wrapped MLI into lines is up to 10 times worse per area than tank MLI. Better insulation for cryo-feed lines is an important enabling technology for NASA Exploration vehicles.

In this Phase I project we would model, conduct a trade study on thermal requirements for NASA spacecraft cryogenic feed lines, design W-IMLI, fabricate a prototype and measure thermal performance.

Access & Use Information

Public: This dataset is intended for public access and use. License: U.S. Government Work

Downloads & Resources


Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_8481
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Datagov Dedupe Retained 20190501230127
Harvest Object Id eec26773-ae5f-49e5-98cb-3978e8090869
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2010-07-01
Homepage URL https://techport.nasa.gov/view/8481
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash 17cdb83baf263bdc3dee6991451a51129f4add52
Source Schema Version 1.1

Didn't find what you're looking for? Suggest a dataset here.