Analysis of all heat dissipation methods can be summarized as three basic heat transfer methods: heat conduction, heat convection, and heat radiation. The heat source temperature is not high, and heat dissipation is mainly conducted by conduction and convection.
The application environment of the closed cavity makes the commonly used air cooling method on the land impossible. Because the temperature of the deep sea water is 0 ~ 4 ℃, and usually has a certain flow rate, it is an excellent medium for absorbing heat, so it bridges the electrical heat source to The heat dissipation channel of the seawater outside the cavity is the best choice to solve the heat dissipation problem.
The electric device Hebei aerator is usually a multi-point heat source, enclosed in the cavity. The heat dissipation path is as follows: heat source → internal heat dissipation medium → metal cavity → seawater.
There is contact thermal resistance or convection thermal resistance between the heat source and the heat dissipation medium in the cavity, the medium and the cavity wall, and there is a diffusive conduction thermal resistance inside the medium or inside the metal cavity wall, where the metal cavity is thermally conductive Excellent titanium alloy material or stainless steel material, so the conduction thermal resistance inside the metal cavity wall is much smaller than other thermal resistances, which is negligible. The convection thermal resistance between the outside of the cavity and the seawater is a fixed value.
In addition, both the convection thermal resistance and the internal thermal conduction resistance are related to the medium in the cavity. Therefore, by changing the characteristics of the heat dissipation medium in the cavity, the thermal resistance between the heat source and the seawater can be reduced, thereby improving the heat dissipation conditions.
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