2 results about "Mass flux" patented technology

This invention discloses a method for calculating the water droplet collection coefficient of a rotationally axisymmetric surface. The method includes: establishing a geometric model of a two-dimensional cross-section of the rotationally axisymmetric surface and meshing it; selecting a two-dimensional axisymmetric computational fluid dynamics model and solving for the two-dimensional axisymmetric airflow field; correcting the airflow field; establishing the force-motion equations for water droplets within a Lagrangian framework; releasing water droplets at equal intervals in the radial direction at a far-field location away from the surface; solving the motion equations for each water droplet; adding the mass flux of water droplets impacting surface micro-elements to the cumulative mass flux of that impacted micro-element; traversing the surface micro-elements and obtaining the water droplet collection coefficient of the rotationally axisymmetric surface based on the ratio of the cumulative mass flux to the theoretically maximum possible mass flux of water droplets collected by that micro-element. This method uses a two-dimensional axisymmetric approach to calculate the airflow field and water droplet collection coefficient of a rotationally axisymmetric surface, significantly reducing the number of meshes and improving computational efficiency.

This invention relates to the field of DCMD module desalination performance testing, specifically a method for analyzing the desalination performance of a seawater desalination system based on engine waste heat recovery. This invention constructs a closed-loop thermal-mass-phase change model driven by engine waste heat and centered on the membrane interface for steady-state analysis of the seawater desalination process; it also comprehensively considers the coupling relationships between multiple parameters. These parameters collectively affect vapor pressure and heat transfer processes, thereby enabling the testing and analysis of the desalination performance of the seawater desalination system. By introducing the Knudsen number of the permeate membrane as a criterion, the microscopic mechanism of water vapor diffusion during membrane distillation is correlated with macroscopic performance testing. Based on the identification of diffusion types, the corresponding physical model is selected to calculate the mass transfer coefficient, improving the accuracy of mass flux and subsequent desalination rate calculations. This allows for real-time testing of the desalination performance of the DCMD module in the seawater desalination system with high accuracy.