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Energy Consumption Economy of Multi-energy Micro-grid based on Exergy Analysis Method

Zhanxin Yan, Junyong Liu, Yang Wu, Lixiong Xu, Li Zhang

Abstract


Micro grid can help realize the multi input of fossil fuels and many output of the energy form. And the energy utilization ratio is a crucial factor to the energy consumption and economic operation of the micro-gird. Based on the energy quality, the exergy analysis method can also take into consideration the quantity of energy, and the energy rate explains the energy utilization more accurately. According to the energy consumption characteristics of the micro grid, the energy cost mode for micro grid is modeled and calculated optimally. Then, through coordinating supply and distribution of the multi-energy, we can increase the utilization ratio of the available energy and decrease energy consumption cost, in order to achieve the goal of the energy saving and economy operation for the micro-grid. After comparing and analyzing the energy consumption, energy consumption rate and exergy utilization rate in the different operation modes, this paper shows the result that this exergy analysis method can get the energy utilization rate more objectively and factually, and it is useful in energy consumption analysis of micro grid.

Keywords


micro-grid contained multi-energy, exergy analysis method, energy rate, energy consumption economy.

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