Measuring method for heat flux density of solid metal

A technology of heat flux density and measurement method, applied in the direction of thermal development of materials, etc., can solve the problems of no measurement of solid metal heat flux density, no written records, etc., and achieve the effects of easy realization of manufacturing process, wide measurement range and high stability.

Inactive Publication Date: 2013-10-16
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

[0004] At present, there is no measuring device and method for measuring th

Method used

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  • Measuring method for heat flux density of solid metal

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Embodiment

[0025] Such as figure 1 As shown, a method for measuring the heat flux density of a solid metal in the present invention is implemented according to the following steps: (A) Determine the thermal conductivity l (W / m.°C) of the object to be measured. The measuring device works in the air medium, the measured object can be charged or non-charged metal, and the working temperature is from room temperature to 600°C. According to the national standard, the thermal conductivity of the measured object is verified, and the thermal conductivity of the measured object under working conditions is l (W / m.℃);

[0026] (B) For the processing of the measurement hole, on the premise of meeting the measurement accuracy requirements and anti-interference ability, try to choose the solid metal internal temperature measurement device with the smallest outer diameter. The outer diameter of the insulating casing of the temperature measurement device is d, and the value range of d 5??10 -4 ~2??10 ...

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Abstract

The invention discloses a measuring method for the heat flux density of a solid metal. The method comprises the following steps: (A) determining a heat conductivity coefficient 1 (W/m. DEG C) of a to-be-measured object; (B) processing measuring holes; (C) respectively installing temperature measuring devices in the measuring holes; (D) respectively measuring temperatures at a point A and a point B by using the temperature measuring devices respectively located at the point A and the point B so as to obtain the temperature TA of the point A and the temperature TB of the point B; and (E) calculating heat flux density of the to-be-measured object in the direction from point A and point B according to a formula. According to the invention, existence of the measuring holes poses little influence on a to-be-measured solid, heat flux density between measured points in a metal solid can be accurately measured in real time, and a measuring apparatus used in the invention has the advantages of a simple structure, easily realizable manufacturing process, a wide measurement range of heat flux density, capacity of realizing high precision measurement of heat flux density in a range of 1 kW/m<2> to 10 MW/m<2> , high stability, good anti-interference capability, etc.

Description

technical field [0001] The invention relates to the field of heat flux measurement, in particular to a method for measuring the heat flux of solid metal. Background technique [0002] Since humans began to use nuclear energy, there have been many serious nuclear leakage accidents around the world, such as the Three Mile Island nuclear leakage accident in the United States, the Chernobyl nuclear leakage accident in the former Soviet Union, and the Fukushima nuclear leakage accident in Japan. Through the analysis of the development and treatment process of the above-mentioned nuclear leakage accident, it can be found that keeping the core melt in the pressure vessel and ensuring the integrity of the reactor pressure vessel can greatly alleviate the further development and deterioration of the severe accident. Now, there is a relatively complete reactor melt retention strategy, and the key points that affect the success of the reactor melt retention strategy are the flow and he...

Claims

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Application Information

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IPC IPC(8): G01N25/20
Inventor 张震熊万玉王雄李朋洲卓文彬韩群霞张兴武
Owner NUCLEAR POWER INSTITUTE OF CHINA
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