Site Energy vs Source Energy:

Site Energy vs Source Energy:

One of the most common mistakes in energy planning is disregarding the differences between source energy and site energy. Site energy is electricity or fuel consumed within a property boundary or vehicle. Source energy is the initial fuel consumed to produce either electricity or transportation fuel. Typically, three units of source energy are consumed to produce one unit of site electricity for electricity generated by fossil fuels. So 1 MJ of site electricity is not equivalent to 1 MJ of transportation fuel because it takes 3 MJ of source fossil fuel energy to generate 1 MJ of site electricity energy.

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