Instrument for measuring thermal conductivity coefficient of one-dimensional plane by using properties of graphite material
A technology of graphite material and thermal conductivity, which is applied in the field of thermal conductivity measuring devices, can solve problems such as poor measurement accuracy of thermal conductivity measuring instruments, and achieve the effects of wide range of measuring objects, easy control and adjustment, and simple operation
Inactive Publication Date: 2011-07-20
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
[0005] The present invention aims at the problem of poor measurement accuracy of current thermal conductivity measuring instruments, and proposes a one-dimensional planar thermal conductivity measuring instrument using graphite material characteristics, which can easily and accurately measure the thermal conductivity of columns and particles within a certain range
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[0015] Such as figure 1 Shown is the cross-sectional view of the one-dimensional plane thermal conductivity tester for the application of graphite material properties. The thermal conductivity tester includes a housing 1, an adiabatic system 2, an electric heater 3, a lower temperature equalizing block 4, an upper temperature equalizing block 5, a U-shaped heat pipe group 6, DC fan 7, cooling fins 8, precision power supply 9, power regulator 10, thermocouple acquisition instrument 11, DC fan speed controller 12, lower equalization block thermocouple group 13, upper temperature equalization block thermocouple group 14, upper , the thermopile 15 between the lower uniform temperature blocks, such as figure 2 The top view of the thermal conductivity tester shown, the outermost layer is the shell 1, which can be equipped with a bracket; the middle is the thermal insulation system 2, which is made of rigid polyurethane thermal insulation material, and the thermal conductivity is ge...
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Abstract
The invention relates to an instrument for measuring the thermal conductivity coefficient of a one-dimensional plane by using properties of a graphite material, which is characterized in that the outermost layer is provided with a shell, the middle is provided with an adiabatic system, and the innermost layer is provided with an electric heater; an upper uniform-temperature block and a lower uniform-temperature block are distributed in the electric heater and are respectively contacted with the electric heater and pieces to be measured, and a U-shaped heat pipe group is embedded in the upper layer of the upper uniform-temperature block; the two ends of the U-shaped heat pipe group are provided with heat-dissipating fins, and a DC fan is arranged on the heat-dissipating fins and is connected with a DC fan speed regulator; thermocouple groups are attached to the upper surface of the lower uniform-temperature block and the lower surface of the upper uniform-temperature block, and a thermopile is arranged between the upper surface of the lower uniform-temperature block and the lower surface of the upper uniform-temperature block; the thermocouple groups and the thermopile are connected with a thermocouple collecting instrument, and the electric heater is connected with a power regulator for regulating electric heating power; and a precise power supply provides a stable power supply for the power regulator. The measuring instrument has wide range of measured objects, ensures accurate one-dimensional heat conduction, improves measurement accuracy, and has good economy, simple operation and convenient modification and improvement.
Description
technical field [0001] The invention relates to a thermal conductivity measuring device, in particular to a one-dimensional plane thermal conductivity measuring instrument using graphite material characteristics. Background technique [0002] Thermal conductivity is an important parameter to evaluate the thermal performance of materials. It directly affects energy utilization efficiency and energy saving effect. It is one of the key considerations in designing new products and one of the important criteria for developing new materials. Therefore, it is of great practical significance to accurately measure the thermal conductivity of materials under different conditions. [0003] At present, most of the thermal conductivity meters in my country use the protected hot plate method, but practice has proved that the existing flat-plate thermal conductivity testers have the following problems: [0004] Most analyzers use a cooling water bath to control the temperature of the cold...
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IPC IPC(8): G01N25/20
Inventor 徐之平刘友朋朱倩郭鹏飞黄新波梁龙辉毛潇菁
Owner UNIV OF SHANGHAI FOR SCI & TECH