Leakage and permeability characteristics of seawater with different concentrations at the distribution windows of variable motor pumps for seawater desalination

The leakage and mutual permeability characteristics of seawater with different concentrations at the distribution windows of a variable motor pump for reverse osmosis seawater desalination were theoretically analyzed. The influence of different swash plate inclination angles, seawater outlet pressures, and piston numbers on the leakage and permeability characteristics at the distribution windows were simulated. By comparison with the theoretical analysis results, the correctness of the simulation model and results were verified. Research results showed that the leakage and permeability characteristics at the distribution windows on both sides weakened slightly with increasing swash plate angle and showed a more strongly decreasing trend with increasing piston number. The leakage characteristics of the seawater at the inner distribution windows were hardly affected by the seawater outlet pressure change, but they were enhanced as the seawater outlet pressure increased at the outer distribution windows. As the seawater outlet pressure increased, the permeability characteristics at the inner distribution windows gradually increased, while they gradually decreased at the outer distribution windows. The research results provide a reference for the integrated design of reverse osmosis seawater desalination systems and the study of the leakage and permeability characteristics at the distribution windows.