who cares about fuel?
Launching a rocket is one of the most critical—and expensive—phases of any space mission. For instance, the Ariane 5 rocket burns around 150,000 liters of liquid hydrogen (LH2) and 33,000 liters of liquid oxygen (LOX) during its ascent, with total mission costs typically ranging from €150 million to €180 million. Given these high stakes, optimizing fuel usage is not just about efficiency; it’s essential for economic viability in the aerospace industry.
The Challenge of Liquid Hydrogen
Liquid hydrogen, while an efficient fuel, poses significant challenges due to its volatility. It must be kept at extremely low temperatures (below -253°C or -423°F) to remain in liquid form, requiring sophisticated storage and handling systems. These systems are complex and add weight and costs to rocket designs.
Additionally, LH2 has a very low density of about 71 kg/m³, meaning large volumes are necessary to store sufficient fuel for a launch. Despite these challenges, hydrogen provides the highest specific impulse of any rocket fuel, typically achieving 366 to 452 seconds in efficiency measurements. This efficiency allows rockets to carry more payload while using less fuel, showcasing hydrogen’s potential for future missions.
Saving Fuel With Artificial Intelligence
To tackle these challenges, the partnership between CNES (Centre National d’Études Spatiales) and Clemessy, a subsidiary of the Eiffage Group, utilizes artificial intelligence (AI) to enhance the fueling process. The AI network learns from historical data to model LH2 behavior during fueling, minimizing risks and ensuring safer launches.
This collaboration not only improves safety but also streamlines operations, allowing for faster and more reliable fueling. AI’s predictive capabilities can significantly enhance the efficiency of the fueling process, reducing potential downtime and associated costs. With rocket launch rates increasing globally, efficiency improvements are vital; for example, the average global launch failure rate is about 1 in 16.
Financial Performance of Clemessy
Clemessy’s investment in AI technology reflects its robust financial standing, with reported revenues of approximately €551.3 million for FY 2021, a gross profit of €481.6 million, and a net income of €19.1 million. Such financial health enables Clemessy to pursue innovations that can meet the growing demand in the aerospace sector.
Environmental Initiatives
Projects like Hyguane, which aim to produce sustainable hydrogen, are expected to significantly reduce CO2 emissions—projected savings of over 3,000 tonnes annually. Additionally, the clean combustion of hydrogen means that its exhaust consists primarily of water vapor, eliminating harmful emissions associated with traditional rocket fuels.
Conclusion
The collaboration between CNES and Clemessy exemplifies how AI can transform rocket fueling processes, addressing significant challenges in safety and efficiency. By leveraging advanced technologies, the aerospace industry can enhance operational viability, contribute to environmental sustainability, and ensure that humanity’s journey into space remains both safe and cost-effective. As this field evolves, the strategic use of AI will position these companies as leaders in the quest for deeper space exploration.
Sources
ActuIA – CNES and Clemessy Develop a Fluidic Systems Simulator:
https://www.actuia.com/actu/cnes-clemessy-simulator/
Spaceflight Now – First Hot-Fire Test of Europe’s Reusable Methane-Fueled Prometheus Rocket Engine:
https://spaceflightnow.com/2022/07/04/first-hot-fire-test-of-europes-reusable-methane-fueled-prometheus-rocket-engine/
ASDNews – Green Hydrogen for Ariane 6 and More:
https://www.asdnews.com/news/2021/09/20/green-hydrogen-ariane-6-and-more
Craft.co – Clemessy Financials:
https://craft.co/clemessy
Craft.co – Clemessy Company Profile:
https://craft.co/clemessy
Wikipedia – Ariane 5:
https://en.wikipedia.org/wiki/Ariane_5
Arianegroup – Ariane 5: Unrivaled Performance and Reliability:
https://ariane.group/en/news/ariane-5-unrivaled-performance-and-reliability/
Aerospace Technology – Ariane 5 Overview:
https://www.aerospace-technology.com/projects/ariane-5/
NASA Technical Reports Server – Spaceflight Over the Last Ten Years: Failures and Fix-ups 2013 – 2022:
https://ntrs.nasa.gov/citations/20220003825
Center for Strategic and International Studies – Successes and Failures of U.S. Space Launch:
https://www.csis.org/analysis/successes-and-failures-us-space-launch
Written with the use of ChatGPT
AI is being used to tackle challenges like safety and efficiency. Fuel might seem boring, but optimizing it is key for both cost and environmental impact. The focus on sustainable hydrogen is especially promising, showing that the industry is thinking about the future as much as its missions.