The Low Temperature Thermal Conductivities of Glassy Carbons

1983 ◽  
pp. 133-138
Author(s):  
A. C. Anderson
Keyword(s):  
Low Temperature ◽  
Thermal Conductivities

Evaluation of Low-Temperature Specific Heats and Thermal Conductivities of Er–Ag Alloys as Regenerator Materials

1996 ◽  
Vol 35 (Part 1, No. 4A) ◽  
pp. 2244-2248 ◽  
Author(s):  
Tetsushi Biwa ◽  
Wataru Yagi ◽  
Uichiro Mizutani
Keyword(s):  
Low Temperature ◽  
Specific Heats ◽  
Thermal Conductivities

scholarly journals The Electrical and Thermal Conductivities of Monovalent Metals

1954 ◽  
Vol 7 (1) ◽  
pp. 70 ◽  
Author(s):  
PG Klemens
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Fermi Surface ◽  
Reasonable Agreement ◽  
Spherical Shape ◽  
Lattice Vibrations ◽  
Electron Theory ◽  
Transverse Lattice ◽  
Conduction Electrons ◽  
Thermal Conductivities

The experimentally determined values of the high and low temperature electrical and thermal conductivities of pure sodium, copper, silver, and gold are such that the ratios of these quantities for each of these metals do not agree with the values expected from the Bloch free electron theory, except for the high temperature Wiedemann-Franz ratio. Reasonable agreement can be achieved by assuming (i) that the conduction electrons can interact directly with transverse lattice vibrations, and (ii) that the Fermi surface departs significantly from spherical shape in all these metals, and touches the boundary of the Brillouin zone in the case of copper, silver, and gold.

Measurement of the Thermal Conductivities of Gases at High Temperatures

1960 ◽  
Vol 82 (1) ◽  
pp. 48-52 ◽  
Author(s):  
Robert G. Vines
Keyword(s):  
Carbon Dioxide ◽  
Low Temperature ◽  
High Temperatures ◽  
Experimental Results ◽  
Temperature Measurements ◽  
Thermal Conductivities

Experimental results are reported for the thermal conductivities of air, argon, nitrogen, and carbon dioxide at temperatures up to 900 C, and of steam up to 560 C. These results are compared with values predicted from correlation formulas based on low temperature measurements.

Analyze the Effect of Thermal Conductivity of Cold Insulation Materials in Cryogenic Engineering

2014 ◽  
Vol 986-987 ◽  
pp. 17-20
Author(s):  
Ming Leng ◽  
Zhao Ci Li ◽  
Jian Yuan Feng ◽  
Guang Rang Li ◽  
Zhao Chen Liu
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Low Temperature ◽  
Foam Glass ◽  
Nonlinear Partial Differential Equations ◽  
Heat Transfer Process ◽  
Insulation Layer ◽  
Insulation Materials ◽  
Energy Equations ◽  
Thermal Conductivities

The pipe heat transfer models were constructed, respectively, to simulate the cryogenic insulated structure, nonlinear partial differential equations was obtained considering the temperature-dependent variation in thermal conductivity of insulation materials. In order to get the temperature profile of insulation layer, Kirchhoff integral method was introduced to process, program, and iteratively calculate the simplified energy equations. The influence of heat-transfer process related to the thermal conductivities of four cold insulators was analyzed. Results indicate that phenolic foam, hydrophobic perlite, and RPUR have superior low-temperature insulation at cryogenic environment, while foam glass has better low-temperature insulation at normal temperature. The thickness of inner cryogenic-insulation layer can be reduced largely by using a multicomponent cold insulator in the discharge pipe of LNG stations, which can save both materials and costs. Meanwhile, it offers a new method to solve variable thermal conductivities.

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