Research On Water And Thermal Management System Of Fuel Cell Power Plant And Demonstration On The Method Of Energy Storage

Water and thermal management of fuel cell plant determines the performance of overall power output,the method of energy storage determines the endurance of the power plant,therefore,the research on the system of water and thermal management of fuel cell and the method of energy storage has an important significance on the performance of the power plant.The article based on the water and thermal management system of fuel cell proposes the design and selection of the key components and the program of water and thermal management system of closed cycle fuel cell and according to the control on the pressure of the thermal system programs the new program using PLC.For the power of 20 kW of the power plant,combined with the experimental data,based on Matlab / Simulink software,it establishes a steady-state model of the fuel cell,the dynamic model and thermal management system model,experimental data and simulation results can be a good match,error is less than 2%,so the models can be used to predict the output performance of fuel cell in different conditions and it has a certain instructive significance on the output performance of the fuel cell.In order to facilitate the importation of different parameters and achieve better human-computer interaction,using of Matlab/GUIDE establishes a visual human-computer input interface,it can be entered different operating parameters directly through the interface,then calling Simulink program simulating the performance of fuel cell.In order to verify the program on water and thermal management system,the demonstration of the program on the constant pressure of closed cycle thermal system is carried out,comparing the experimental data and simulation studies,it has been found that the program on the constant pressure of closed cycle thermal system can achieve a balance between the gas and the water on the control of the pressure,showing the pressure of the water changing with the pressure of the gas and the differential pressure controlled within a range of claims.Comparing the simulation of the modeling built by AMESim software and experiment,it has been found that the spatial arrangement of the stack,water pumps,water tanks has an effect on the control of the pressure,showing that the stack located downstream of the tank and the upstream of the pump is the best sequential arrangement.By different comparative experiments on external humidification programs it has been found that,with the stack temperature increasing,the performance of the exhaust self-humidification program is closer to that of the membrane humidification program in terms of the overall output performance of fuel cell,when it comes to the uniformity of the monomer cell output,the performance of the exhaust self-humidification program is superior to that of the membrane humidification output.The exhaust self-humidification program not only reduces the use of the components and deionized water,but also it can reduce the emission of generated water,improving the integration of the system,effectively dealing with the problem of generated water of the system and inlet humidification.For the use of fuel cells as a power plant on the underwater vehicles,energy storage system determines the endurance of the submersibles.The different backgrounds and requirements of the application and the storage space also determine the selection of the methods of energy storage.In the artical,it is carried out the comparative analysis on the performance of the existing methods of energy storage and it proposes the selection process on energy storage.Combined with a certain type of energy storage requirements of the UUV it is carried out the selection and design of the method of energy storage,the method of the storage of hydrogen is sodium borohydride and the oxygen storage method is hydrogen peroxide.