Design and Analysis of a Spacecraft Water Evaporator

New thermal control systems like evaporator heat sinks are integrated into the Active Thermal Control System and into the Flight Control System of Space Planes. The development of these new systems is performed through mathematical process analyses and tests. This paper concerns the establishment of a Thermal Mathematical Model (TMM) for the analyses.

The design of the HERMES Water Evaporator Assembly (WEA) is presented.

The thermodynamics and numerical requirements upon a TMM for heat exchangers are derived and explained in detail. As an example the WEA TMM is depicted and results of transient analyses are discussed.