V-HAB Atmosphere Modeling and Simulation for a Crewed Polar Sortie



Journal Title

Journal ISSN

Volume Title


2023 International Conference on Environmental Systems


Habitats beyond Low Earth Orbit (LEO) must include a robust and reliable Environmental Control and Life Support System (ECLSS) to meet the environmental and metabolic needs of the crew with minimal support from Earth. The University of Colorado Boulder HERD Graduate Project team designed an ECLSS for a notional Human Landing System (HLS). The proposed ECLSS will support two or four crewmembers on the lunar surface during a 6.5-day surface sortie or 31.8-day extended surface stay, the latter with resupply from preplaced assets. Modeling and simulation of the system-level dynamics during these mission scenarios is necessary to verify and validate the ECLSS design. The Virtual Habitation modeling and simulation tool (V-HAB) has been under development at the Technical University of Munich since 2006 to dynamically simulate life support systems and their interactions with crew metabolism. Firstly, this work presents a V-HAB system-level model of the HERD team’s HLS ECLSS, supported by the development and validation of two new component-models within the V-HAB tool: a lithium hydroxide bed for carbon dioxide removal and a Nafion membrane for humidity control. Secondly, a V-HAB crew model for a 6.5-day Polar Sortie mission simulates varying crew metabolic loads from nominal and extravehicular activities over the course of the mission. Finally, we integrate the system-level ECLSS model with the crew model to assess the ability of the proposed HLS ECLSS to maintain crew health and support crew activities throughout a Polar Sortie.


Amrita Singh, University of Colorado, USA
Trayana Athannassova, University of Colorado, USA
James Nabity, University of Colorado, USA
Claas Olthoff, Airbus Defence and Space, Germany
ICES300: ECLSS Modeling and Test Correlations
The 52nd International Conference on Environmental Systems was held in Calgary, Canada, on 16 July 2023 through 20 July 2023.


ECLSS, Simulation, Crewed, Crewed, Lunar, Sortie, V-HAB