Finite‐element design of a guarded heating cylinder to measure thermal properties of materials
作者： J. Nicolas , F. Martin , Ph. Andre , J.‐F. Rivez
DOI: 10.1063/1.1141516
关键词: Thermodynamics 、 Finite element method 、 Mechanics 、 Materials science 、 Heat transfer coefficient 、 Thermal diffusivity 、 Material properties 、 Cross section (physics) 、 Thermal conductivity 、 Thermal 、 Cylinder
摘要: A device for the measurement of thermal properties phase change materials and, in general, medium conductivity materials, is described. The measuring cell a modified version guarded hot plate technique, here designed about 8‐cm‐diam samples. well‐known difficulty arises such device: its limitation when sample cross section becomes too small with respect to thickness. finite‐element model used study shape isotherms thick (10 cm) different configurations device. This analysis has led selection optimum design. It shows that instrument able handle samples diameter thickness ratio 1 so far as heat transfer coefficient remains beneath some limits (here 100 W/m2 K). control system also described and typical results are presented.
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sci-hub.se 参考文章(4)
E. Murrill, L. Breed, Solid—solid phase transitions determined by differential scanning calorimetry Thermochimica Acta. ,vol. 1, pp. 239- 246 ,(1970) , 10.1016/0040-6031(70)80027-2
J. Font, J. Muntasell, J. Navarro, J.L.L. Tamarit, Time and temperature dependence of the exchanged energy on solid-solid transitions of pentaglycerine/neopentylglycol mixtures Solar Energy Materials. ,vol. 15, pp. 403- 412 ,(1987) , 10.1016/0165-1633(87)90060-8
J. Timmermans, Plastic crystals: A historical review Journal of Physics and Chemistry of Solids. ,vol. 18, pp. 1- 8 ,(1961) , 10.1016/0022-3697(61)90076-2
Refrigerating, ASHRAE handbook : 1985 Fundamentals ASHRAE. ,(1985)