CONDENSATION-EVACUATED CRYOGENIC THERMAL INSULATION SYSTEMS: EXPERIMENTAL RESULTS OF EFFECTS OF DEPOSITED FILLING GASES
Open accessAbstract
The objective of this work is to investigate the effect of deposited CO 2 on the solid thermal conductivity of evacuated cryogenic insulation systems.Therefore, measurements were performed using a modified guarded hot-plate (GHP) apparatus with bellows, acting as sample containment at temperatures in the range from 77 K to 300 K.These gas tight bellows allows the venting of the specimen with a defined gas volume.Existing thermal heat transfer models, which assume a superposition of thermal transfer due to radiation and solid thermal conductivity, were used to account for the thermal effects of deposited gases and the resulting increase of the solid thermal conductivity.Measurements were performed on typical insulation material classes, e.g.powders, fibres and foams.
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Geisler et al. show two different gas-filling processes, warm filling and cold filling, based on mass metering of a specific quantity of gas.
“Similarly, in other cryogenic condensation-evacuated thermal insulation test measurements, Geisler et.al show two different gas-filling processes, warm filling and cold filling, but based on mass metering of a specific quantity of gas [8].”
From Thermal conductivity of aerogel blanket insulation under cryogenic-vacuum conditions in different gas environments (2017) · cites this paper as [8]
The Experimental Technique and Method II sections describe two procedures: CO₂ is introduced after the specimen is cooled in Method I, and before cooling in Method II. They specify defined gas quantities, and the Discussion compares injections of 2.5 g CO₂. However, the Experimental Technique describes injection of a defined volume, not mass metering, so the claimed metering method is not established. (LLM, conf=0.86)
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Research works printed but not linked: 5
- Fricke J., "From Dewars to VIPs -One Century of Progress in Vacuum Insulation Technology", 7th International Vacuum Insulation Symposium, Switzerland, pp. 5-14, (2005).
- Geisler M., Ebert H.-P., International Journal of Thermophysics, "Thermal characterisation and effect of deposited CO2 on a cryogenic insulation system based on a spherical powder", under review (submitted on 17. September 2008).
- Caps R., Arduini-Schuster M.C., Ebert H.-P. Fricke J., Int. J. Heat Mass Transfer, 36, pp. 2789-2794, (1993).
- Geisler M., Wachtel J., Hemberger F., Schultz T., Vidi S. and Ebert H.-P., International Journal of Thermophysics, 29, pp. 1385-1394, (2008).
- Rettelbach, R., Sauberlich, J., Korder, S., Fricke, J., Journal of Physics D-Applied Physics, 28, pp. 581-587, (1995).
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Fesmire, J. E., Ancipink, J. B., Swanger, A. M., White, S., & Yarbrough, D. (2017) · IOP Conference Series: Materials Science and Engineering · doi:10.1088/1757-899x/278/1/012198 · Cited by 18 · see citing works
- Authors
- Geisler, M., Wachtel, J., Hoffmann, J., Ebert, H.-P., & Weisend, J. G.
- Affiliations
- Bavarian Center for Applied Energy Research (DE)
- ORCID
- Ebert, H.-P.
- Venue
- AIP Conference Proceedings
- Publisher
- AIP
- Published
- 2010
- Pages
- 755-763
- ISSN
- 0094-243X (ISSN-L)
- OpenAlex
- W2046727851
- Cited by
- 2
- References
- 0
- Citations by year
- 2017: 1
- FWCI
- 0.64
- Type
- conference paper
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- AIP conference proceedings (publishedVersion)
- Topics
- Physical Sciences › Engineering › Aerospace Engineering › Spacecraft and Cryogenic Technologies
- Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
- Physical Sciences › Chemistry › Spectroscopy › Aerogels and thermal insulation
- Keywords
- cryogenic insulation, solid thermal conductivity, guarded hot plate apparatus, radiation heat transfer, foam insulation, thermal conductivity models
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