Design Blueprint: A Regenerative Hydrogen-Oxygen Fuel Cell System Carrying a Lunar Outpost Through the Night

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24189143): This study sizes a regenerative hydrogen-oxygen fuel cell system carrying a 15 kilowatt outpost load through the 354 hour night: night energy is 5 megawatt-hours, requiring 245 kilograms of hydrogen and 1959 kilograms of oxygen cycling through 2204 kilograms of water, a daytime electrical input of 14 megawatt-hours at a round-trip efficiency of 38 percent, and hydrogen storage volume of 6.1 cubic metres at the stated density. Sizing follows from computed energy budgets derived in the study. This is a computed study with no targeting or weapon application. The work is simulated and computed from stated assumptions, not measured. Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.