Method of predicting degradation of fuel cell catalyst using the method of creating particle size distribution model

摘要

A particle size distribution creating method includes a particle size range determining step, an integrating step of integrating the frequency of appearance of particles within the particle size range determined in the particle size range determining step, a division point determining step of determining particle sizes that provide division points, using the integral of the frequency of appearance obtained in the integrating step, and a typical point determining step of determining the minimum particle size, maximum particle size and the particle sizes of the division points as typical points. This method is characterized by assuming a particle size distribution which contains particles having the particle sizes of the respective typical points and is plotted such that the frequency of appearance of the particles having the particle size of each of the typical points is equal to the integral over each of the regions defined by the typical points, and obtaining the assumed particle size distribution as a particle size distribution model.

主权项

1. A computer implemented method of predicting degradation of a fuel cell catalyst, comprising:
a step of creating, using a computer, a particle size distribution model of a fuel cell catalyst using a particle size distribution model creating method of creating a particle size distribution model, the particle size distribution model simulating a particle size distribution of a cluster of particles including a plurality of particles having different particle sizes; and a step of predicting, using the computer, degradation of the fuel cell catalyst, using the particle size distribution model of the fuel cell catalyst, wherein the particle size distribution model creating method includes: a particle size range determining, using the computer, step of determining a minimum particle size and a maximum particle size of the particles included in the cluster of particles to be simulated; an integrating step of integrating, using the computer, frequency of appearance of the particles within a particle size range determined in the particle size range determining step, using the minimum particle size as a starting point and the maximum particle size as an endpoint; a division point determining step of dividing, using the computer, an integration region obtained in the integrating step into a given number of regions by performing first division, using a value of integral of the frequency of appearance obtained in the integrating step, so that values of integrals obtained for the regions resulting from the first division are equal, and determining particle sizes at the ends of the regions as division points; a typical point determining step of determining the minimum particle size, the maximum particle size and the particle sizes of the division points, as typical points; a step of assuming a particle size distribution which contains particles having the particle sizes of the typical points, and is plotted such that frequencies of appearance of the particles having the particle sizes of the typical points are equal to the values of integrals obtained for the regions defined by the typical points; and a step of obtaining an assumed particle size distribution as a particle size distribution model.