Abstract:
This research work aims on the design and examination of a compressor for use in hydrogen refilling stations, Hydrogen fueling in the context of fuel cell vehicles are complex task for design engineers. Present study planned for employing advanced tools such as CFD for 3D modeling and ANSYS for fluid-structural interface analysis and builds upon existing design calculations and geometrical parameters. The design objectives for the 9 blades centrifugal compressor include achieving a pressure ratio of 10, an operational speed of 100,000 rpm, a mass flow rate of 0.6 kg/s, and maintaining an inlet temperature of 288 K. Computational Fluid Dynamics (CFD) is used to further refine the analysis, with the compressor operating at atmospheric inlet conditions and aiming for a tenfold pressure increase at the outlet with minimal temperature rise. The fluid properties are incorporated through property tables in the computational analysis code, and hexahedral meshes are created using the ATM optimize technique in ANSYS TurboGrid. Steady-state simulations for the real gas are conducted using the k-ω SST turbulence model in Ansys CFX software, resulting in an achieved polytropic efficiency of 87.88% for the compressor. Research is extended to study and analyze 8 and 10 blades of centrifugal compressors and compare results with 9 blades configuration. The study underscores the reliance on numerical methods and meshing techniques in the design and development of centrifugal compressors for efficient hydrogen fueling solutions.
Aim and objectives.
Aim
Design and carry out a simulation for the centrifugal compressor and impeller performance analysis for the hydrogen refuel storage tank.
Objectives
- Determine the necessary design parameters for the compressor to hydrogen storage tank, such as design pressure and temperature.
- Create a 3D model of the centrifugal compressor impeller using ANSYS CCD software.
- Identify the optimum meshing approach using mesh convergence.
- Analyze the pressure head, power, and Efficiency by changing the impeller blades.
- Determine the optimum number of blades of impeller to get more efficiency and pressure head.
Figure : Single passage Meshing.
Fig: boundary conditions
Fig. Normalized span vs Mrel
