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Trade Study of an Exploration Cooling Garment
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 29, 2008 by SAE International in United States
Annotation ability available
A trade study was conducted with a goal to develop relatively high TRL design concepts for an Exploration Cooling Garment (ExCG) that can accommodate larger metabolic loads and maintain physiological limits of the crewmembers health and work efficiency during all phases of exploration missions without hindering mobility. Effective personal cooling through use of an ExCG is critical in achieving safe and efficient missions. Crew thermoregulation not only impacts comfort during suited operations but also directly affects human performance. Since the ExCG is intimately worn and interfaces with comfort items, it is also critical to overall crewmember physical comfort. Both thermal and physical comfort are essential for the long term, continuous wear expected of the ExCG.
The subsystems and design considerations that were studied include the amount and placement of cooling, the ventilation system, the carrier structure in terms of the number and configuration of garment components, garment materials, the cooling line configuration, ancillary equipment, water connectors, and a bio-medical harness. The guiding principle of the ExCG system is the physiological design of cooling. Based on this study, it is recommended that the ExCG be configured as a one piece garment with physiologically placed cooling lines on the head, back, top of the shoulders, ribs, lower arms, inner thighs, and calves. Placement of tubing in these physiological zones was based on the results of a cooling analysis and crew survey. An optimal cooling line configuration was selected through analytical and experimental investigation of different materials, tube geometries, and tube routing. An assessment of the ventilation system, beginning with a historical perspective and considering a wide range of options including a vent system on the pressure garment, concluded that a vent system should be integral with the ExCG. Materials were selected based on the mapping of material functionality of different physiological zones.
This paper will discuss the recommended ExCG system concept and its expected ability to meet goals and requirements described in the Crew, Robotics, and Vehicle Equipment (CRAVE) delivery order (DO 25) for the ExCG. This concept will maintain crew thermal balance and physical comfort while simplifying ExCG operations and logistics.
CitationFerl, J., Hewes, L., Aitchison, L., Koscheyev, V. et al., "Trade Study of an Exploration Cooling Garment," SAE Technical Paper 2008-01-1994, 2008, https://doi.org/10.4271/2008-01-1994.
- Koscheyev, V.S. Coca, A. Leon, G.R. Dancisask, M.J. “Individual thermal Profiles as a Basis for Comfort Improvement in Space and Other Environments” Aviation, Space, and Environmental Medicine 73 1195 1202 2002
- Koscheyev, V.S. Leon, G.R. Trevino, R.C. “An Advanced Physiological Based Shortened Liquid Cooling Garment for Comfort Management in Routine and Emergency EVA” Proceedings of the 32nd International Conference on Environmental Systems. SAE Technical Paper Series 2002-01-2413 Warrendale PA SAE International
- Koscheyev, V.S. Coca, A. Leon, G.R. 2007 “Overview of physiological principles to support thermal balance and comfort of astronauts in open space and on planetary surfaces” Acta Astronautica 60 479 487
- Koscheyev, V.S. Leon, G.R. Ferl, J. Coca, A. Graziosi, D. “Comparison of Shortened and Standard Liquid Cooling Garments to Provide Physiological and Subjective Comfort During EVA” Proceedings of the 34 th International Conference on Environmental Systems. SAE Technical Paper Series 2004-01-2347 Warrendale PA SAE International
- Engineering Assessment of Prototype Enhanced Liquid Cooling Ventilation Garment ILC Dover Final Report 2004
- Photos from Basic Anatomy Textbook
- Nunnely S.A. “Water Cooled Garments: A Review” Life Sciences 1970
- Kuno, Y. Human Perspiration Springfield IL Thomas Charles C. 1956
- Trevino, L.A. Bue, G. Orndoff, E. Kesterson, M. Connell, J.W. Smith, J.G. Jr. Southward, R. Working, D. Delozier, D.M. Clancy, T. Ghose S. Sun, Y. Lin, Y. “Flexible Fabrics with High Thermal Conductivity for Advanced Spacesuits” International Conference on Environmental Systems, Electronic Proceedings 2006
- Watson, K.A. Connell, J.W. Smith, J.G. Jr. Southward, R. Trevino, L. Bue, G. Orndoff, E. Delozier, D.M. Ghose, S. Lin, Y. Sun, Y.P. “Flexible Fabrics with High Thermal Conductivity for Advanced Spacesuits” Space Technology and Applications Forum, AIP Conf. Proceed 813 Electronic Proceedings 2006
- Pizzuto, J.J. Fabric Science Fairchild Publications 1994
- Ghose, S. Watson, K.A. Working, D. Connell, J.W. Smith, J.G. Jr. Lin, Y. Sun, Y. “Thermal Conductivity of Ethylene Vinyl Acetate Copolymer/Carbon Nanofiller Blends” Composites Science and Technology 2007
- Milliken Fabrics MIL-075 brochure
- “The Role of Antimicrobial Silver Nanotechnology” Medical Device & Diagnostics Industry Magazine Aug 2005
- Final Report DO-CRAVE-D025