Cabin Humidity & Condensation Simulator

A sealed spacecraft cabin has no outside air exchange, so every liter of water vapor a crew exhales or sweats out stays in the loop until something removes it. This simulator models that vapor-generation-versus-condensing-capacity balance directly: crew respiration and activity add water vapor to the cabin air every second, a condensing heat exchanger pulls a share of it back out, and the psychrometric relationship between temperature and dew point determines exactly when the remaining moisture starts condensing on cold equipment instead of staying safely airborne. Watch the relative-humidity trace and the dew-point-vs-surface-temperature gap to see how crew load, cabin temperature and condenser sizing each shift the balance.