22 Design and Simulation of Heat Dissipation System for HV Power House of the Seafloor Junction Box

According to the high power dissipation, high insulating requirement and enclosed limited space of the HV Power House used in the Ocean Observatory systems' Junction Box, we designed a special heat dissipation system by oil-filling and used an elastic component for volume compensation of thermal expansion. The result of the FVM numerical simulation indicated: Under this system, we can control the temperature of the HV Power House very well. It is also greatly helpful to solve the local over-high temperature problem occurring in some high power components to make sure that the Seafloor Junction Box can work reliably in the designed temperature and pressure range.