AUTHOR=Wang Jun , Du Wei , Yang Dongmei 

TITLE=Integrated Energy System Planning Based on Life Cycle and Emergy Theory

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.713245

DOI=10.3389/fenrg.2021.713245

ISSN=2296-598X

ABSTRACT=The integrated energy system (IES) is of great significance to the construction of the modern energy system. Reasonable planning is one of the important means to improve the economy of the IES and promote the consumption of renewable energy. However, the complex coupling characteristics between energy sources make it difficult to quantify the production efficiency of multi-energy heterogeneous resources uniformly in the economic benefit model during the planning cycle. How to quantify the production efficiency of the IES for planning is currently an urgent problem to be solved. This paper proposes a planning method for IES based on the life cycle and emergy theory. First, emergy theory is applied to quantify production efficiency of IES. A complete economic benefit model is established based on life cycle theory. Secondly, a bi-level planning model of the IES is established. The upper-level model aims at minimizing the whole life cycle cost of the IES to plan the capacity and location of the coupling equipment. The lower-level model aims at maximizing the emergy yield ratio of the IES to provide the operating data for the upper-level. Finally, comparing experiments with traditional planning schemes considering annual average cost and energy quality coefficient, the method in this paper reduces planning costs by 23.16% and increases the consumption rate of renewable energy by 4.26%. It can be seen that the planning method proposed in this paper improves the planning economy and the level of renewable energy consumption of the IES.