NASA's CryoFILL System: Making Rocket Fuel on the Moon and Mars
NASA engineers at Glenn Research Center in Cleveland, Ohio, are conducting tests on the Cryogenic Fluid In-Situ Liquefaction for Landers (CryoFILL) system. This technology aims to produce rocket propellant directly on the Moon or Mars by liquefying oxygen extracted from local resources, potentially reducing launch mass from Earth and enabling longer-duration space missions.
Project Overview and Purpose
The CryoFILL project addresses the logistical challenge of fueling long-distance space missions by developing the capability to produce propellant at the destination. The core objective is to cool and condense oxygen, which can be extracted from water ice found in the Moon's permanently shadowed regions, into a liquid state suitable for rocket fuel.
Evan Racine, CryoFILL project manager at NASA Glenn, stated that the ability to produce and liquefy oxygen on extraterrestrial surfaces could allow landers to be fueled on-site, thereby reducing the amount of propellant required for launch from Earth.
Oxygen is a primary component of rocket fuel, and while it can be extracted as a gas, it requires extreme cooling to become liquid propellant.
Technology and Process
Engineers are utilizing a flight-like cryocooler, developed by Creare LLC under NASA’s Small Business Innovation Research (SBIR) program, to facilitate this process. The cryocooler removes heat, allowing oxygen to condense and be maintained at temperatures below minus 300 degrees Fahrenheit (approximately -184 degrees Celsius).
Wesley Johnson, CryoFILL lead engineer, noted that current tests involve flight-like hardware to observe oxygen liquefaction and the system's response under various conditions. These observations are considered crucial for scaling up and automating future in-situ refueling capabilities.
Strategic Importance for Space Exploration
The development of in-situ propellant production aligns with NASA's broader space exploration goals. The Artemis program, which seeks to establish a long-term human presence on the Moon as a precursor for crewed missions to Mars, emphasizes the utilization of lunar resources. Producing propellant on the Moon could decrease mission costs and extend the duration of planetary surface operations by lessening the reliance on Earth-launched fuel supplies.
Ongoing Testing and Future Applications
Over the next three months, NASA engineers will continue to analyze oxygen condensation and collect data to validate temperature computer models. The results from these tests are expected to inform the scaling of the technology for larger applications and guide the design of future systems for use on the Moon, Mars, and other planetary surfaces.
The CryoFILL project is managed by the Cryogenic Fluid Management Portfolio Project, a collaborative effort between NASA Glenn Research Center and NASA’s Marshall Space Flight Center. This portfolio encompasses over 20 technology development activities and operates under NASA’s Space Technology Mission Directorate.