Model improvement of inventory analysis on energy upstream phase based on life cycle assessment

Based on the existing life cycle inventory model, a new model and algorithm of energy upstream is put forward. The results of life cycle inventory therefore can be traced back to the terminal. Life cycle inventory analysis of energy upstream iterative calculations includes energy consumption and environmental emission not only involving mining, production but also transportation and distribution phases, providing a firm foundational platform for not only energy downstream phase but also the whole life cycle analysis of the energy system. Energy LCI model contains two hierarchies: the part of life process and the part of high-order cycle. The result shows LCEE and LCEC of secondary energy like power is larger than primary energy. Therefore, adjusting the energy structure and increasing proportion of clean and renewable energy in power generation are significant ways to reduce air pollution and greenhouse gas emissions.