Question

A coal-fired power station has a power output of p and its efficiency is ε. it burns a mass of coal m every second. the best estimate of the energy density of the coal used is\

Answer 1

Energy density =  Energy output in Joules / ( kg of fuel burned).

With efficiency of conversion of coal considered,

Energy density = Energy output in Joules / (efficiency x kg of fuel burned).

ED = P/(εm)