To reduce the surface temperature of the electric heating element and extend the service life of the radiant electric heater,four dif-ferent arrangements of electric heating elements were designed and the heat transfer characteristics of the radiant electric heater were studied and analyzed by Fluent simulation.The results show that under the condition of meeting the requirements of the material outlet temperature,the temperature differences between the heating element and the nitrogen gas region for each scheme are as follows:Scheme 1 is approximately 190 ℃,Scheme 2 is approximately 210 ℃,Scheme 3 is approximately 200 ℃,and Scheme 4 is approximately 180 ℃.Scheme 4 exhibits a temperature difference that is reduced by 10～30 ℃ compared to the other schemes,resulting in a more stable temperature field.The average temperatures of the heating elements for each scheme are as follows:Scheme 1 is approximately 910 ℃,Scheme 2 is approximately 950 ℃,Scheme 3 is approximately 905 ℃,and Scheme 4 is approximately 860 ℃.Therefore,Scheme 4 achieves a temperature reduction of 40～90 ℃ compared to other layout configurations,leading to a lower temperature for the heating elements.
关键词
辐射式电加热器/电加热芯/布置方式/表面温度/Fluent/温度场
Key words
radiant electric heater/electric heating element/arrangement/surface temperature/Fluent/temperature field
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