The design of a concentric cylinder calorimeter for measuring the apparent thermal conductivity of MLI blankets is presented. Unlike similar devices where a liquid cryogen is used to control the cold boundary temperature and the cryogen boil-off rate is used to obtain the heat transfer through blanket, the design presented in this paper utilizes mechanical refrigerators to control the boundary temperatures and a heat rate meter to determine the heat load. This approach ensures two unique features of the apparatus. First, the use of cryocoolers enables the user to set the boundary temperatures anywhere within the operating range of the refrigerators and therefore permits a wide range of temperature and temperature differences with the measurement. The other unique feature is that the total heat transfer through the blanket is obtained by measuring the heat conducted along a cold cylinder support rod of known thermal conductivity. To determine the absolute thermal conductivity, a calibration is needed to eliminate the temperature related effects on the support rod.
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12 June 2012
ADVANCES IN CRYOGENIC ENGINEERING: Transactions of the Cryogenic Engineering Conference - CEC, Volume 57
13–17 June 2011
Spokane, Washington, USA
Research Article|
June 12 2012
An apparatus to measure the apparent thermal conductivity of multilayer insulation (MLI)
Dogan Celik;
Dogan Celik
National High Magnetic Field Laboratory, Florida State University Tallahassee, FL 32310,
USA
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Richard John Klimas;
Richard John Klimas
National High Magnetic Field Laboratory Tallahassee, FL, 32310,
USA
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Steven Van Sciver;
Steven Van Sciver
National High Magnetic Laboratory Tallahassee, FL, 32310,
USA
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Jalal Zia
Jalal Zia
GE Healthcare Florence, SC 29501,
USA
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AIP Conf. Proc. 1434, 1313–1318 (2012)
Citation
Dogan Celik, Richard John Klimas, Steven Van Sciver, Jalal Zia; An apparatus to measure the apparent thermal conductivity of multilayer insulation (MLI). AIP Conf. Proc. 12 June 2012; 1434 (1): 1313–1318. https://doi.org/10.1063/1.4707056
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