A Pre-Cooling System for a Venus Sample-Return Ascent Stage: Refrigeration Load and Time Sizing

This study sizes a Pre-Cooling System for a Venus Sample-Return Ascent Stage for operation in the Venus surface environment and reports the result as SIMULATED, NOT MEASURED. The design is developed from stated physical relations and a shared environmental basis, and every performance figure is computed by the deposited script rather than asserted. Among the computed results are pre-cooling target temperature of 290.0 kelvin, sensible cooling load of 60.4 kilowatt-hours, heat leak during cooling of 420.0 watts, cooling duration of 60.0 hours. Mass and power budgets are assembled from components so that they can be audited, off-design behaviour and materials uncertainty are discussed openly, and the limits of the sizing are stated in full. The system is a civilian science and construction design intended for a robotically serviced surface station.