4TH International Congress on Technology - Engineering & SCIENCE - Kuala Lumpur - Malaysia (2017-08-05)

Computational Study Of Hydropneumatic Accumulator For Storage Energy Using The 3D CFD Simulation
Renewable energy has a significant role to play in developing economies and contribute towards sustainable development. By developing energy sources such as large hydro power, wind power, geothermal power, and liquid biofuels, developing countries can reduce their dependence on oil and natural gas, creating energy portfolios that are less vulnerable to price fluctuations. Our work is to demonstrate the feasibility of new technology combining offshore wind turbine and OWC system by hydraulic (or hydropneumatic) accumulator which is constituted by a precharged gas chamber and fluid Chamber connected to a hydraulic system. The chambers are separated by a piston. Our goal is that the hydropneumatic system is integrated into a wind and water power field. The benefit of integrating energy storage into a wind and water power array is that fluctuations can be smoothed over time and electric power generation equipment can be sized commensurate with a supply power that is nearer the average wind and water power of the day. The design is proposed to be used in a fluid power system. In such as system, we use hydraulic equipment for power conversion and transmission, as shown in Figure. It employs hydraulic circuits, a hydraulic drive pump, hydraulic pumps and motors, hydraulic accumulators. Key to success of the system is efficient compression and expansion of nitrogen in the accumulator. The job will focuses in the modeling of the hydraulic accumulator by using 3D CFD method (computational fluid dynamic) with the commercial code ANSYS-Fluent. Based on dynamic meshes approaches, and by explicating of several turbulence models, and after comparative study, we improve the validity of our model.
Mustapha MALHOUNI, El Mostafa BOUDI