Hi.
This is my first time using Comsol so please bare with me :)
I'm doing a model of a HV power cable, that heats up due to the current flowing through it.
I know that the temperature of the isolation material can not exceed 90degC so i want to figure out how much current this allows.
It's a 2D model where i have a circular crosssection of the cable.
I set the temperature at the boundry of the conductor to 90degC. I put a 1.3m thick layer of soil around the cable (also circular) which is 15degC at the outer boundry.
Then I set a point potential in the middle of the conductor to 150kV and put ground at the outer boundry of the isolation layer.
When i run this i get some very low current densities. Maybe my problem is that the current i flowing i random directions and not into or out of the 2D plane as was intended.
And i'm not sure that it even depends on the temperature i specified or just calculates from the voltage and the resistance of the material.
\Simon
PS. i attatched my comcol file
This is my first time using Comsol so please bare with me :)
I'm doing a model of a HV power cable, that heats up due to the current flowing through it.
I know that the temperature of the isolation material can not exceed 90degC so i want to figure out how much current this allows.
It's a 2D model where i have a circular crosssection of the cable.
I set the temperature at the boundry of the conductor to 90degC. I put a 1.3m thick layer of soil around the cable (also circular) which is 15degC at the outer boundry.
Then I set a point potential in the middle of the conductor to 150kV and put ground at the outer boundry of the isolation layer.
When i run this i get some very low current densities. Maybe my problem is that the current i flowing i random directions and not into or out of the 2D plane as was intended.
And i'm not sure that it even depends on the temperature i specified or just calculates from the voltage and the resistance of the material.
\Simon
PS. i attatched my comcol file