Design and Application of Surface Emissivity Measuring Device for Metallic Materials
[Purposes]In response to the problem of low accuracy and high cost of measuring the surface emissivity of tube bundles in shell-and-tube heat exchangers,this paper designed a device for measur-ing the surface emissivity of metal materials and proposed a method for measuring the surface emissivity of metal materials.[Methods]The device combined with a temperature smoothing algorithm can provide measurement of the surface emissivity of the material under test when the equipment is in full operating condition.[Findings]The method was used to test lumped steel samples in the temperature range of 200～500℃,and the results show that the temperature under the standard algorithm still fluctuates and causes the emissivity to oscillate.The optimization algorithm has a significant smoothing effect on the noise and emissivity,and is sufficiently resistant even in the face of external environmental perturba-tions.[Conclusions]The results of the study can provide a reference for the accurate measurement of the temperature in the furnace.
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