Research And Environmental Benefit Evaluation Of Wind-solar Hybrid Hydrogen Production System

Environmental protection is a basic national policy of our country,as an important means to protect the environment,the optimization and adjustment of energy structure has been concerned by the government,researchers and the general public.The development and utilization of renewable energy,such as wind energy,solar energy,geothermal energy,tidal energy and so on,are powerful means to achieve the goal,especially wind energy and solar energy.They are widely distributed and have great reserves.The comprehensive utilization of wind/solar energy and hydrogen storage can avoid the serious energy loss caused by fluctuation and randomness of wind/solar energy themself.That can not only improve the utilization efficiency of such clean energy,but also broaden their usage.Based on the existing research of wind-solar hybrid power generation system and hydrogen produce system,taking a suit of wind-solar complementary hydrogen production system(in Hebei Handan)as a prototype,the Malab/Simulink models of wind-solar power generation,hydrogen production by electrolysis water and hydrogen storage units were established respectively according to the mathematical of the corresponding unit.The simulation data of solar and wind power models under certain environmental conditions(solar radiation,wind speed,air temperature)were compared with the experimental data of the prototype system to verify the reliability of those two units.By designing a set of micro-electrolysis hydrogen production experiment and literature research,it is substantiated that the energy consumption of electrolysis water unit and hydrogen-compressing in the model is similar to that of expected.The simulation model of wind-solar hybrid hydrogen production system was studied by orthogonal simulation experiment,and the hydrogen production rate of the system under different virtual parameter combination was simulated.The effects of total solar radiation(A),ambient temperature(B),wind speed(C),rotor speed(D)and hydrogen production temperature(E)on hydrogen production efficiency were analyzed by variance analysis.The results showed that A had the highest effect on hydrogen production efficiency of wind-solar hybrid hydrogen production system in central-south Hebei province(represented by Handan city).The influence levels of other factors were(from strong to weak): wind speed,ambient temperature,rotor speed and hydrogen production temperature.It was concluded that the utilization of wind-solar hybrid hydrogen production system in central-south Hebei province should emphasize the utilization of solar energy.The environmental benefit of wind-solar hybrid hydrogen production system is the starting point and end point of our research.In this paper,the carbon emission reduction capacity of the experimental system was calculated based on the methodology of “building new energy storage power stations in new or existing renewable energy power plants”.the emission reduction capacity of the system in reducing atmospheric pollutants such as sulfur dioxide and nitrogen oxides were analyzed as well.In conclusion,the system has well environmental benefits and is worth to be develop and utilized.