Comprehensive Energy Efficiency Assessment of Park-level Multi-energy System Considering Difference of Energy Grade

被引：0
|
作者：
Liu H. [1 ]
Zhao Y. [1 ]
Liu X. [1 ]
Zhang Q. [1 ]
Ge S. [1 ]
Liu J. [1 ]
机构：
[1] Key Laboratory of Smart Grid, Tianjin University, Ministry of Education, Nankai District, Tianjin
来源：
Dianwang Jishu/Power System Technology | 2019年 / 43卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Comprehensive energy efficiency; Energy grade; Energy quality coefficient; Multi-energy system; Renewable energy;
D O I：
10.13335/j.1000-3673.pst.2018.2830
中图分类号：
学科分类号：
摘要：
In view of current failure in realizing detailed decomposition of energy efficiency in energy subsystems and energy links, and lack of effective measurement of renewable energy utilization and energy grade differences in comprehensive energy utilization efficiency assessment of park-level multi-energy system, a comprehensive energy efficiency assessment method based on energy quality coefficient is proposed. Firstly, an evaluation model for comprehensive energy efficiency of multi-energy systems with energy storage devices is constructed, considering the utilization of renewable energy and the difference of energy grades. Secondly, the multi-energy system is decomposed into electric/gas/heat/cold energy supply subsystems and several energy conversion equipments, and energy efficiency evaluation models of each energy supply subsystem and each energy conversion equipment are proposed. Thirdly, combined with comparative analysis of several unified conversion methods for different grades of energy, an energy quality coefficient conversion method based on exergy analysis is proposed and the calculation method of energy quality coefficient is given. Finally, effectiveness and practicability of the proposed method are verified with an example analysis of an actual park-level multi-energy system. © 2019, Power System Technology Press. All right reserved.
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收藏
页码：2835 / 2842
页数：7
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