Station Oxygen Generation Assembly

Spacecraft don't carry unlimited breathing air — a real oxygen generation assembly (OGA), like the one aboard the ISS, electrolyzes recovered water into oxygen and hydrogen using a solid-polymer-electrolyte cell stack. This simulator renders that stack in 3D and drives it with the actual physics: Faraday's law of electrolysis ties the current through each cell directly to the molar rate of O₂ and H₂ produced, independent of voltage, while the applied cell voltage separately sets how much power the stack draws. Adjust current, cell count, voltage and crew size and watch O₂ bubbles rise from the anode side and H₂ bubbles (at twice the molar rate, per the 2H2O → 2H2 + O2 stoichiometry) rise from the cathode side, with live readouts for O₂ output, H₂ byproduct, stack power, electron flow, and whether production is keeping pace with crew consumption at roughly 0.84 kg O₂ per person per day.