王鑫 1李斌 1刘艺博 1吴正人 1王强 2李新福1
作者信息
- 1. 华北电力大学能源动力与机械工程学院,河北 保定 071003
- 2. 安徽淮南平圩发电有限责任公司,安徽 淮南 232089
- 折叠
摘要
Abstract
To achieve efficient coupling between coal-fired power plants(CFPP)and compressed air energy storage(CAES),a system that couples the flue-gas side of CFPP with CAES is proposed.During the energy release phase of this coupled system,the flue gas from CFPP is used to heat the high-pressure air before it enters the expander.This avoids introducing additional heat sources,which would increase costs,or extracting steam from the turbine side to heat the high-pressure air,which would affect the output of the thermal power unit.Subsequently,to reduce the effect of extracted flue gas on the operation of a single thermal power unit,a CAES coupled system sharing the flue gas of two thermal power units is established.Based on the above thermodynamic models of the systems,modeling is carried out using EBSILON software and performance analysis is conducted.Then,an optimal economic operation strategy for the plant-level coupled system is proposed.The results show that,at full load,compared with the steam-coupling scheme,the flue-gas-coupling scheme reduces the standard coal consumption rate by 2.15 g/(kW·h),increases the heat consumption rate by 37.06 kJ/(kW·h),raises the energy utilization coefficient by 0.33 percentage point,and decreases the auxiliary power rate by 0.20 percentage point.The overall electrical efficiency,round-trip efficiency,and CAES operating efficiency of the flue-gas-side coupling are all higher than those of the steam-side coupling.After the economic optimization of the plant-level coupled system,the net revenues of four typical days increase by 143 700,157 600,188 100 and 208 700 yuan,respectively.关键词
火电机组烟气侧/压缩空气储能/耦合系统/EBSILON仿真/性能分析Key words
flue gas side of thermal power unit/compressed air energy storage/coupled system/EBSILON simulation/performance analysis
