Output Characterictcs Experimental Study And Dynamic Simulation Of Self-humidifying Open Cathoda Pemfc

Energy and the environment have become two strategic themes of sustainable development of human society. Increase the development and use of wind, solar, hydrogen and other new energy sources has become an inevitable trend. Fuel cell is not limited by Carnot cycle, directly isothermal the chemical energy stored in the fuel and oxidant into electricity, with high efficiency and zero emissions. Among them, the Proton Exchange Membrane Fuel cell (PEMFC), has widely applied in portable mobile power, scattered power station, uninterruptible power supply, electric cars and other fields.PEMFC is a nonlinear, coupling complex system, its working principle involved in fluid mechanics, mass transfer, thermodynamics, electrochemistry, control study and many other disciplines. The self-humidifying PEMFC equipment simplifies the battery system and improves the fuel cell power output. The only source of water is generated from the cathode electrochemical reaction. So the water balance and heat balance management of PEMFC are the two major factors affecting membrane water content, and their impact on battery performance coupled to each other.This paper firstly, according to the thermodynamics and kinetics model, completed the PEMFC cathode temperature control and linear temperature scanning test experiment based on the homemade self-humidifying PEMFC test platform. In addition, a simple summary has given to the temperature controller which used for laboratory tests.Usually, the open circuit voltage of PEMFC single cell is0.9V to1.0V. In order to meet the requirements of load voltage, dozens to hundreds pieces of single cells combine to PEMFC stack. Cathode cooling fan has direct influence on battery temperature distribution. According to the air cooling PEMFC stack developed by Temasek Polytechnic, Singapore, carried out the relevant experimental study. The battery’s output performance under different load, and the voltage distribution of monomer battery was tested. Temperature distribution on the surface of the PEMFC stack is tested through the Infrared Thermal Mapping Technique.Finally, on the basis of empirical model and the basic principle of electrochemical and ideal gas state equation, a simulation model of self-humidifying PEMFC single cell is established. And experiments have been carried out to verify the simulation model by the Autolab test platform. At the end of the article, sums up the achievements, put forward the deficiency of the system and gives the author’s suggestion.