Comparison and analysis of heat-power decoupling technologies for CHP units

被引：0
|
作者：
Wang Z. [1 ]
Gu Y. [1 ,2 ]
Liu H. [1 ]
Li C. [1 ]
机构：
[1] School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing
[2] National Thermal Power Engineering Technology Research Center, North China Electric Power University, Beijing
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 07期
关键词：
combined heat and power (CHP); decoupling ability; energy efficiency; exergy efficiency; heat-power decoupling technologies;
D O I：
10.16085/j.issn.1000-6613.2021-1626
中图分类号：
学科分类号：
摘要：
Increasing the flexibility of combined heat and power (CHP) unit operation can improve the utilization rate of renewable energy and reduce the “abandoned wind energy” and “abandoned solar energy”. However, there have been few comparison and analysis studies of the flexible modification techniques. In this paper, Ebsilon software was used to establish thermodynamic model of a 600MW unit, and an associated energy consumption model was established by passing simulation results to a Matlab routine. The influence of heat-power decoupling technologies, such as heat pump, electric boiler, heat storage tank, and steam turbine retrofit technologies on the operation feasible region and thermodynamic performance within the operation feasible region was analyzed using thermodynamic and energy consumption models. The results showed that the heat-power decoupling technologies can expand the operation feasible region of the unit. When heat load of the unit was 500MW, minimum peaking capability of the unit can be ranked from the largest to the smallest after using the heat-power decoupling technologies: electric boiler>bladeless shaft operation of low pressure cylinder>low pressure cylinder near zero output>compression heat pump>heat storage tank. However, energy and exergy efficiency of electric boiler were the lowest among all heat-power decoupling technologies. After analysis, it is an energy-saving decoupling way to use compression heat pump or compression heat pump coupled with heat storage tank in CHP units. © 2022 Chemical Industry Press. All rights reserved.
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页码：3564 / 3572
页数：8
相关论文
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