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The air interchange performance between the modules is an important factor in the atmosphere revitalization system of International Space Station (ISS) to maintain a habitable environment for the crew during on-orbit activities. A SINDA/FLUINT model of the integrated ISS air quality control system was constructed in support of pre and in-flight predictions of cabin air temperature and humidity, and CO2 partial pressure. This model calculates masses and partial pressure for the major gas constituents, such as O2, N2, CO2, and H2O. This model also simulates the effect of crew activities and their location in the station. The elements are linked together in terms of air interchange in the models via Inter-module ventilation (IMV). The air in each volume is assumed to be perfectly mixed. Latent loads and IMV air are assumed to be immediately and uniformly distributed throughout the cabin air volume of each element.

This paper presents the basic test data obtained from tests of a cabin air distribution system in a simulated Space Station Man-Tended Capability (MTC) configuration and correlations of some of this data with the results from analytical modeling of the test setup flow conditions. The MTC configuration simulated in the test setup includes: Lab-A, the Node, the Cupola, and the Pressurized Module Adaptor (PMA). The test data and analytical data presented are confined to those for the Lab module. The cabin air distribution system controls the flow of air in the open space of a Space Station module. In order to meet crew comfort criteria the local velocities for this cabin air are required to be distributed within a specified range with upper and lower limits.