Concluding Remarks

Various energy sources have been characterized based on the global efficiency. It has been shown that conventional calculation of efficiency lacks several factors which are needed to take into consideration. The most usual practice is to consider the local efficiency of the system as a measure of efficiency. However, considering the local efficiency does not necessarily represent the true efficiency of a system. In order to have the true evaluation of any system, global efficiency has been introduced. Global efficiency represents the overall integrated system efficiency considering the pathways of the system, waste utilization and impacts to the natural environment. It has been argued here that an energy system that has high local efficiency does not necessarily mean that the system will have higher global efficiency. The introduction of global efficiency offers paradigm shift in characterization of energy sources. Moreover, considering only the local efficiency, the energy sources might have either overvalued or undervalued. As energy consumption is related with the higher emission of pollutants including greenhouse gases, the only way to increase the efficiency and reduce the environmental impact is to increase the global efficiency of any energy system.

The Greening of Petroleum Operations by M.R. Islam, A.B. Chhetri and M.M. Khan Copyright © 2010 Scrivener Publishing LLC.

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