| Fuel cell vehicles have attracted more and more attention because of their low emissions and high energy efficiency.Whether the vehicle power source can be used efficiently or not directly affects the overall economy of the vehicle.As a new field of fuel cell thermal management,the research of fuel cell waste heat recovery helps to improve the overall fuel utilization.The current research is mainly focused on the matching ideas of traditional automobile waste heat management.Still,few studies related to the matching design of fuel cell vehicle waste heat reuse system,and there is no systematic summary of the factors affecting system performance.Taking the waste heat reuse system of fuel cell vehicle as the research object,this paper establishes the system waste heat exchange model and the total energy consumption model of the system,studies the influence of relevant parameter variables on the model,and obtains the influence law of each parameter on the system energy consumption.Waste heat exchange under lowtemperature working conditions.the waste heat reuse system of 60 k W fuel cell vehicle is matched and designed.The simulation analysis and experimental verification are carried out.The main contents are as follows:(1)The basic structure and working principle of fuel cell vehicle and its waste heat reuse system are introduced.The system residual heat exchange model and system energy consumption model are established.(2)According to the operating parts and constants are taken into account in the model,the simulation model of the waste heat reuse system of fuel cell vehicle is established using AMEsim software.By changing the value of the selected parameters,each parameter’s sensitivity relative to the objective function is discussed,and the influence rules of parameters on waste heat exchange and system energy consumption at low temperature are obtained.(3)Taking the influence parameter law as the matching design principle,the waste heat reuse system of 60 k W fuel cell vehicle is matched.The parameter matching results are input into the fuel cell vehicle waste heat reuse system’s simulation model.The relevant calculation tasks are set to evaluate the system performance from two aspects of waste heat exchange and system energy consumption.The results show that when the ambient temperature is-3℃ and-6℃ respectively,the waste heat exchange capacity of the new matching scheme is 16.2% and 16.3% higher than that of the original scheme,and the total energy consumption of the system is reduced by 62.02% and 60.62%,respectively.(4)The waste heat reuse system of fuel cell vehicle is studied by experimental method to test the actual operation performance of the matching design scheme of the waste heat reuse system at low temperature. |
