Heat Transfer Performance and Engineering Application of Phase Change Dispersion for Cooling System in the Convert Valve

The heat transfer performance of the phase change dispersion is obtained through our experimental and numerical simulation. The influence of the heat flux, flow rate and mass fraction on the heat transfer characteristics of the converter valve under the cooling condition of the phase change dispersion is discussed. The reliability of the model and algorithm is also verified via experiments. The results show that the average heat transfer coefficient of the phase change dispersion is almost three times that of the water. The thermal resistance of the heat sink using the phase change dispersion is 50% lower than that of the cooling water. Meanwhile, the pressure drop of the phase change dispersion is slightly increased by about 12%. Compared with the deionized water, the phase change dispersion can further increase the transmission capacity of HVDC project by about 20%, and the converter valve is increased in its short-term overload capacity.