本文在质子交换膜燃料电池(PEMFC)水运输机理的基础上探究了水含量、

This paper explores the influence of water content, relative humidity and pressure drop on the power generation efficiency of PEMFC on the basis of the water transport mechanism of the proton exchange membrane fuel cell (PEMFC). A new power generation efficiency of the PEMFC stack is proposed. Based on the numerical model (GE), the specific value of power generation efficiency was finally obtained. The relationship between water content, relative humidity and pressure drop based on the GE model is discussed. The geometric model is established and the calculation grid is divided, and the GE model is imported into Fluent for calculation through a user-defined function (UDF) to complete the simulation calculation of the fuel cell under different working conditions. A comparative analysis of the GE model, the Fluent model and the experimental data shows that the accuracy of the GE model is when the battery operating temperature is 60 ℃, the current density operating range is 0-399 mA/cm2, and the intake relative humidity is 100% It is 34.9% higher than the Fluent model; its maximum power generation efficiency is 45.338%.

Based on the water transporting structure of proton exchange membrane fuel cell (PEMFC), this paper explores the effect of water content, relative humidity and pressure drop on PEMFC power generation efficiency, and puts forward a new numerical model (GE) of power generation efficiency of proton exchange membrane fuel cell reactor, and finally obtains the specific value of power generation efficiency. The characteristic relationship between water content, relative humidity and pressure drop based on GE model is also discussed. Build geometric models and divide calculation grids, import GE models into Fluent through custom functions (UDF), and complete simulation calculations of fuel cells under different operating conditions. A comparative analysis of the GE model, fluent model and test data shows that when the battery operating temperature is 60 degrees C, the current density is 0-399 mA/cm2, and the relative humidity of the air infested is 100%, the accuracy of the GE model is 34.9% higher than that of the Fluent model, and its maximum power generation efficiency is 45.338%.

Based on the water transport mechanism of proton exchange membrane fuel cell (PEMFC), this paper explores the influence of water content, relative humidity and pressure drop on the power generation efficiency of PEMFC. A new numerical model (GE) of power generation efficiency of proton exchange membrane fuel cell stack is proposed, and the specific value of power generation efficiency is finally obtained. The relationship among water content, relative humidity and pressure drop based on Ge model is discussed. The Ge model is imported into fluent by user-defined function (UDF) to complete the simulation calculation of fuel cell under different conditions. The Ge model, fluent model and test data were compared and analyzed. The results show that when the operating temperature of the battery is 60 ℃, the operating range of current density is 0-399 MA / cm2, and the relative humidity of air inlet is 100%, the accuracy of Ge model is 34.9% higher than that of fluent model, and the maximum power generation efficiency is 45.338%.<br>