Spacecraft Water Recovery System: A Closed-Loop Mass Balance

Overview of the System

A spacecraft water recovery system is essential for long-duration missions, where every drop of water must be conserved. The 2D flow diagram illustrates a vapor-compression distillation loop that recovers potable water from wastewater by condensing and reusing it.

The system operates on the principle of distillation, which separates components based on their boiling points. In this case, water is distilled from wastewater using heat generated by the spacecraft's power systems.

Components and Flow Dynamics

Key components include a feedwater tank for storing wastewater, a distillation column where water vaporizes, condensers to cool down the steam back into liquid water, and storage tanks for clean water. The flow dynamics are influenced by the crew size, which determines the amount of wastewater produced.

The efficiency of the recovery process is adjustable through a slider, reflecting real-world variations in system performance due to fouling or maintenance issues.

System Dynamics and Mass Balance

The 2D flow diagram visualizes how water moves through these components. The live reserve strip-chart provides a real-time mass balance, showing the amount of wastewater processed and the resulting clean water available.

Understanding these dynamics is crucial for mission planning, as it helps in predicting resource needs and ensuring crew health.

Real-World Applications

This system design is not just theoretical; it has been implemented on the International Space Station (ISS) to recycle up to 93% of wastewater, significantly reducing the need for resupply missions.

Future space habitats and Mars missions will rely heavily on such systems to ensure water sustainability.

Frequently asked questions

Try it live

Everything above runs in your browser — open Spacecraft Water Recovery System — 2D Flow Diagram and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.