Research on temperature rise model and characteristics of insulation-coated drainage line
The ordinary drainage wire is insulated by silicone rubber material, which effectively improves its insulation performance.However, the heat dissipation condition of the original wire is changed.To clarify the influence of the insulation layer on the temperature field of the drainage line, the electromagnetic-temperature field coupling calculation model is built by using the finite element numerical calculation method.The influence of the thickness, thermal conductivity and current carrying capacity of the insulation layer on the temperature distribution of the drainage line is simulated and analyzed.Our results show as the thickness of the insulating layer increases, the heat transfer process becomes longer, and the temperature outside the insulating layer gradually decreases, while the temperature inside the insulating layer is close to that of the conductor core, both of which decrease first and then increase.The thermal conductivity of the insulating layer material is an important factor affecting the temperature change of the conductor core, but it has little effect on the outside of the insulating layer.Finally, the rising-temperature experiment is conducted by using the trial-produced insulation drainage line sample, and the simulation and experimental calculation results are compared and analyzed to verify the validity of the calculation model.Our research results may provide some references for the design of insulation drainage wire.
insulation drainage lineinsulation layersilicone rubberfinite element calculationtemperature distribution
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