Study On Power Generation Using Magnetic Fluid And Stagnation Point Of The Boundary Layer Equations

Magneto-hydrodynamic (MHD) power generation is a kind of technology with high efficiency and low pollution. Relative to other power mode, there are some advantages using MHD power generation, with compact structure and high power outputting.Referring to the theoretical analysis on the experiment of power generation us-ing magnetic fluid, in this paper, a new power generation system using magnetic-fluid is introduced. The system which is used with non-poisonous magnetic fluid and operated at room temperature is proposed in the present paper. The system mainly includes five parts, such as energy producing, pump, temperature control-ling, energy outputting. The system could be used as a micro-distributed energy supply system for domestic use in the future.An experiment set-up is designed and established to investigate the performance of the power generation with an aid of a theoretical analysis of the power generation. Based on the numerical analysis, the electric output increases with Reynolds number,size of the test channel, magnetic strength and electric conductivity. It is understood that in order to obtain a prac-tical power generation.priority should be put on increasing fluid flow velocity and magnetic field strength.According to the system, in this paper. a micro-distributed energy system is proposed, and it can utilize waste heat from microchip, etc, and provide electric energy to user.In this paper, it gives the numerical analysis of the nonlinear ordinary differ-ential boundary layer equation.and the properties of the boundary layer equations. Power series solution is also analysed at η=0. We have the below conclusions. First, for the arbitrary Re, there is a stagnation point of f"(η), the stagnation point value deduced with the increased of the Re; when the value of η is less than the stagnation point, f"(η) is increased; when the value of η is more than the stagna-tion point, f"(η) is induced. Finally, it gives the theoretical solution of derivation of the second order in the boundary layer equation with large Reynolds number. For gived Re and77, we can get the coefficients.