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Development of an Integrated Design Resolution Plan for the International Space Station Active Internal Thermal Control System Coolant Stability Concerns
Technical Paper
2001-01-2333
ISSN: 0148-7191, e-ISSN: 2688-3627
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Language:
English
Abstract
The International Space Station (ISS) Internal Active Thermal Control System (ITCS) for the United States Laboratory (USL), and follow-on pressurized elements, uses a mechanically-pumped fluid in closed-loop circuits. The ITCS utilizes a specifically formulated heat transfer fluid (essentially de-ionized water with special additives). Silver ions are specified in the formulation to assist in the control of microorganisms. The potential for microorganisms to form biofilms known to cause heat transport, corrosion problems, and subsequent hardware deterioration has raised concerns among the ISS engineering community.
This paper provides the integrated design resolution to: 1) ensure the coolant meets the required fluid specification; 2) obtain long term “fleet leader” data; 3) allow sampling of the ITCS coolant on-orbit; 4) return the coolant to the ground for complete chemical analyses including microbial parts count; and 5) add silver ions to the coolant stream(s) for on-orbit microbial growth control.
Authors
Citation
Daugherty, R. and Chambliss, J., "Development of an Integrated Design Resolution Plan for the International Space Station Active Internal Thermal Control System Coolant Stability Concerns," SAE Technical Paper 2001-01-2333, 2001, https://doi.org/10.4271/2001-01-2333.Also In
References
- SAE # 961607 “Controlling the Catastrophic Hazard of Introducing Ammonia into the Breathable Atmosphere of the International Space Station Elements” Daugherty R. S. Bellmore P.
- “Verification of Ammonia Strip Assay” December 7 1998 Dean Thomas A.
- SAE 2001-01-2334 International Space Station Internal Thermal Control System Cold Plate/Fluid Stability Test Set-up and Preliminary Test Results Ray Charles D. Daugherty Robert S.
- SAE 2001-01-2337 Preliminary Assessment of Microbial Adhesion Surface of Materials from the ISS Internal Thermal Control System: Results of an Accelerated 60-day Study Roman M. C. Macuch P. Van Der Schiff O. J. Mittelman M. W.
- Development and Verification of an Electrode System for Electrolytic Generation of Silver Ion Biocide for the Space Station Internal Thermal Control System Fluid January 30 2001 Cole Harold E.