These two diagrams compare the efficiencies of brown coal and black coal in terms of power production by highlighting the energy loss in every step.
It is evident that both electrical generation means incorporate 3 steps-namely, transportation of coals by trucks, transmittion from power stations to electricity infrastructions, and transportation and distribution from electricity infrastructions to users. Additionally, energy loss between power production measures by using two different fuels are relatively similiar.
Both measures of electricity production start from sending coals which is equivalent of a hundred unit of energy to power stations using trucks, then, these coals will turn these fuel into energy. Power stations use these coals to generate power, brown coal can generate 30 units of energy, while black coal can create just 2 units of energy higher than the brown coal, which is 32 units in total. Soon after, power will be transfer to electricity towers without any energy loss for both methods. Lastly, 3 units of energy will be lost for both fuels when power transferred to consumers, which the results are 27 units for brown coal and 29 units for black coal.