Method and apparatus for measuring methanol vapor concentration, method of controlling methanol vapor concentration in a fuel cell, and fuel cell using the same

摘要

A method of measuring methanol vapor concentration on a real-time basis and a methanol vapor concentration measuring apparatus used in fuel cells. The method of measuring methanol vapor concentration involves using an absorption spectrometry technique, that is, after measuring intensities I₀ and I₁ of light of a laser before and after passing through a space filled with methanol vapor and into which light is irradiated, the methanol vapor concentration is calculated by substituting the intensities I₀ and I₁ into an equation defined as I₁/I₀=exp (K·L·C), where K represents the absorption coefficient, L represents the length of the space through which the laser passes, and C represents the methanol vapor concentration.