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Final Test Results for the Ground Operations Demonstration Unit for Liquid Hydrogen.

W U Notardonato¹, A M Swanger¹, J E Fesmire¹

¹NASA Kennedy Space Center, Cryogenics Test Laboratory, KSC, FL 32899 USA.

|June 6, 2020

Summary

This summary is machine-generated.

The Ground Operations and Demonstration Unit for Liquid Hydrogen (GODU LH2) achieved zero-loss storage and transfer, liquefaction, and densification of liquid hydrogen propellant. This large-scale test validated the integrated refrigeration and storage system over two years.

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Area of Science:

Cryogenic engineering
Aerospace engineering
Propellant management

Background:

Developing advanced storage systems is crucial for long-duration space missions.
Efficient management of cryogenic propellants like liquid hydrogen presents significant technical challenges.

Purpose of the Study:

To test and validate the Ground Operations and Demonstration Unit for Liquid Hydrogen (GODU LH2) system.
To demonstrate zero-loss storage and transfer, gaseous liquefaction, and propellant densification.
To assess the performance of an integrated cryogenic refrigeration and storage system.

Main Methods:

Utilized a commercial cryogenic refrigerator integrated with a 125,000-liter liquid hydrogen tank.
Employed a closed-loop Brayton cycle refrigerator and a novel internal heat exchanger for heat extraction.
Conducted tests at three different liquid hydrogen fill levels, collecting data on pressure, temperature, and mass flow.

Main Results:

Successfully demonstrated zero-loss storage and transfer of liquid hydrogen.
Achieved gaseous liquefaction and propellant densification capabilities.
Validated the performance of the integrated refrigeration and storage system over approximately two years of testing.

Conclusions:

The GODU LH2 system successfully met all primary test objectives.
The integrated system provides a viable solution for advanced liquid hydrogen propellant management.
The project demonstrated significant advancements in cryogenic storage technology for space exploration.