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TECHNICAL PAPERS: Conduction

Subtle Issues in the Measurement of the Thermal Conductivity of Vacuum Insulation Panels

[+] Author and Article Information
Francis C. Wessling, Marlow D. Moser, James M. Blackwood

Department of Mechanical and Aerospace Engineering, The University of Alabama in Huntsville, 301 Sparkman Dr. TH N270, Huntsville, AL 35899

J. Heat Transfer 126(2), 155-160 (May 04, 2004) (6 pages) doi:10.1115/1.1683674 History: Received May 09, 2003; Revised January 12, 2004; Online May 04, 2004
Copyright © 2004 by ASME
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References

Wessling, F. C., Stodieck, L. S., Hoehn, A., Woodard, S., O’Brien, S., and Thomas, S., 2000, “Low Temperature, Low Energy Carrier (LoTec©) and Phase Change Materials (PCMs) for Biological Samples,” 30th International Conference on Environmental Systems, OOICES-338, Toulouse, France, July 10–13, 2000.
Zeng,  S. Q., Hunt,  A., and Greif,  R., 1995, “Theoretical Modeling of Carbon Content to Minimize Heat Transfer in Silica Aerogel,” J. Non-Cryst. Solids, 186, pp. 271–277.
ASTM C 117-97, “Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus,” American Society for Testing and Materials, Philadelphia, PA.
Hunt, A. J., Jantzen, K., and Cao, W., 1991, “Aerogel—A High Performance Insulation Material at 0.1 bar,” Insulation Materials: Testing and Applications, ASTM STP 1116, R. S. Graves, and D. C. Wysocki, eds., 2 , American Society for Testing and Materials, Philadelphia, pp. 455–463.
ASTM C 518-98, “Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus,” American Society for Testing and Materials, Philadelphia, PA.
ASTM C 745-92, “Standard Test Method for Heat Flux Through Evacuated Insulations Using a Guarded Flat Plate Boiloff Calorimeter,” American Society for Testing and Materials, Philadelphia, PA.
ASTM C 1114-00, “Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Thin-Heater Apparatus,” American society for Testing and Materials, Philadelphia, PA.
Zeng,  J. S. Q., Stevens,  P. C., Hunt,  A. J., Grief,  R., and Lee,  D., 1996, “Thin-Film-Heater Thermal Conductivity Apparatus and Measurement of Thermal Conductivity of Silica Aerogel,” Int. J. Heat Mass Transf., 39(11), pp. 2311–2317.
Coleman, H. W., and Steele, W. G., 1999, Experimentation and Uncertainty Analysis for Engineers, 2nd ed., John Wiley & Sons, Inc., New York.
Coleman, H. W., and Steele, W. G., 1999, Experimentation and Uncertainty Analysis for Engineers, 2nd ed., John Wiley & Sons, Inc., New York, p. 50.
Incropera, F. P., and DeWitt, D. P., 1996, Fundamentals of Heat and Mass Transfer, 4th ed., John Wiley & Sons, Inc., New York.
Hewitt, G. F., Shires, G. L., and Polezhaev, Y. V., eds., 1997, International Encyclopedia of Heat and Mass Transfer, CRC Press LLC., Boca Raton FL., p. 1949.
Smith,  D. M., Maskara,  A., and Boes,  U., 1998, “Aerogel-based Thermal Insulation,” J. Non-Cryst. Solids, 225, pp. 254–259.

Figures

Grahic Jump Location
Insulation panels are shown between the cold plates. The thin heater is sandwiched between the panels. The entire assembly is suspended in the vacuum chamber. Tubes covered by radiation shielding supply coolant to the cold plates.
Grahic Jump Location
Close-up of top of test assembly: (1) 25.4 mm aluminum cold plates; (2) 12.5 mm vacuum insulation panels; (3) 0.16 mm thin foil heater between the vacuum insulation panels; and (4) C-clamps on four corners to hold assembly together.
Grahic Jump Location
Top corner of test assembly with thin threaded rod replacing C-clamp
Grahic Jump Location
Uncorrected measured thermal conductivity versus the average of heater and cold plate temperatures with the thin heater and no C-clamps. Data are for heater temperatures at the chamber wall temperature, 10 deg above the chamber wall temperature, and 10 deg below the chamber wall temperature.
Grahic Jump Location
Uncorrected measured thermal conductivity versus the average of heater and cold plate temperatures with the thick heater and C-clamps. Data are for heater temperatures at the chamber wall temperature, 10 deg above the chamber wall temperature, and 10 deg below the chamber wall temperature.
Grahic Jump Location
Corrected measured thermal conductivity versus the average of heater and cold plate temperatures with the thin heater and no C-clamps. Data are for heater temperatures at the chamber wall temperature, 10 deg above the chamber wall temperature, and 10 deg below the chamber wall temperature.
Grahic Jump Location
Corrected measured thermal conductivity versus the average of heater and cold plate temperatures. These data show that the difference between heater temperatures at the chamber wall temperature, 10 deg above the chamber wall temperature, and 10 deg below the chamber wall temperature are within the uncertainty of the measurement and are therefore not differentiated.
Grahic Jump Location
Test assembly with thick heater and radiation “shield.” Radiation from heater and edges of vacuum insulation panel reflects from radiation “shield” to cold plates.

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