Question

What is the overall efficiency of a fuel cell? (E=Delivered voltage, I=current delivered for a period of time T)

(a) \(\frac{(EIT)}{∆H} \)

(b) \(\frac{(ET)}{∆HI} \)

(c) \(1-(\frac{(EIT)}{∆H}) \)

(d) \(\frac{∆H}{EIT} \)

I had been asked this question in an interview for internship.

The question is from Inorganic Chemical in chapter Inorganic Chemical Industries of Chemical Technology

Answer 1

Correct option is (a) \(\frac{(EIT)}{∆H} \)

Explanation: The overall efficiency of a fuel cell is given by \(ƞ_o=\frac{EIT}{∆H}.\) It is the fraction of heat reaction of primary fuel converted into useful electric work at the device terminals.