Performance Simulation And Optimization Of Thermally-Regenerative Ammonia-based Flow Battery

At present,energy consumption in most developed countries has generally declined,while energy consumption in China continues to rise,especially the proportion of fossil energy,mainly oil and coal,remains a high level,and huge lowtemperature waste heat is generated in the process of energy consumption.If these lowtemperature waste heat can be recycled,it will be conducive to energy saving and emission reduction,and can support the implementation of the plan of "achieving carbon peak by 2030 and carbon neutral by 2060".Nowadays,there are various ways to recycle low-temperature waste heat,among which thermally-regenerative ammoniabased flow battery have high power density,scalability and low cost,and therefore have great potential for future development.However,the previous studies on thermallyregenerative ammonia-based flow battery is only focused on single cell,which is limited for low-temperature waste heat recovery.In order to recover a large amount of low-temperature waste heat and achieve commercialization rapidly,the research on thermally-regenerative ammonia-based flow battery stack is very necessary.Firstly,a numerical analysis model of the thermally-regenerative ammonia-based flow battery was constructed in Matlab/Simulink,and the simulation results obtained were verified with the experimental data literature,and the performance of the single cell at different flow rates and reactant concentrations was investigated.Secondly,based on the single cell,a thermally-regenerative ammonia-based flow battery stack model was constructed,and since the transport of electrolyte in the pipeline takes time(transport delay),the transport delay was coupled into the stack system in order to be more realistic,and the effect of different operating conditions and system design on the performance of the stack system was explored.Related research has also been carried out on the transport delay phenomenon in the stack system.The existence of the transport delay will have an impact on the stack system.It will cause the electrolyte concentration entering different stacks at the same time to change,resulting in different electricity.Different output voltages between stacks lead to premature cut-off of voltage.The transport delay is related to operating parameters such as pipeline size and flow rate.Therefore,this paper studies the influence of different operating conditions and system design on the transport delay,and explores the factors that reduce the effect of transmission delay...