Conference proceedings paper

IAF Human Spaceflight Symposium 2019


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Publication Details

Author list: Anih S, Paganb AS, Kochb H, Martinez P, Laufer R, Herdrich G

Publisher: International Astronautical Federation ( IAF )

Place: Washington, DC, USA.

Publication year: 2020

Start page: 585

End page: 598

Total number of pages: 14

ISBN: 9781713814849


Abstract

This paper presents the Waste for Energy and Volume Recovery (WEVR) campaign activities initial results
of the investigation predicated on waste management during future long-duration crewed space missions
beyond Low Earth Orbit (LEO). The experiments were performed at the Institute of Space Systems (IRS)
of the University of Stuttgart as part of the collaboration with the University of Cape Town's SpaceLab. One
of the WEVR investigations utilizes waste package simulant (WPS) test samples derived from the Life
Support Baseline Values and Assumptions Document (BVAD) and normalized to a mass of 25 g. The WPS
were subjected to thermal decomposition through exposure to a plasma generated by an inductively heated
plasma generator (IPG), operated with either oxygen or nitrogen as a test gas in the Plasma Wind Tunnel 3
(PWK3), an atmospheric entry test facility at IRS. The mass of the WPS was measured before and after
each test to assess the mass loss rate. Physical characteristics of the WPS were also inspected. Test samples were contained in a cylindrical, cage-type sample holder with a base of 56 mm diameter mounted onto a 50 mm diameter water-cooled plasma probe, which was moved into the center of the plasma plume to assess the decomposition process. Test conditions for oxygen and nitrogen were selected for operational
comparability. Test conditions were characterised using a Pitot probe, ambient pressure gauge, and a
calorimeter. The decomposition of the sample was tracked via optical emission spectrometry (OES) focused
on the stagnation point region, thermographic imaging and optical video. The preliminary findings of this
campaign are analyzed and discussed.


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Last updated on 2021-06-05 at 09:30