Energy Supply Vs. End Use
Total world energy supply is distinct from actual world energy usage due to energy loss. For example, in 2008, total world energy supply was 143,851 TWh, while end use was 98,022 TWh. Energy loss depends on the energy source itself, as well as the technology used. For example, Nuclear Power (as of 2008) loses 67% of its energy to water cooling systems.
In 2008, world nuclear energy was 8,283 TWh (constituting 5.8% of total world energy), while nuclear energy end-use was 2,731 TWh (2.8%).
Given significant energy supply-to-usage ratios, It is important to note these differences across various energy sources.
Read more about this topic: World Energy Consumption
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