Effect of Carbon Capture Technology Application on Peak Shaving Capacity of Coal-Fired Units

doi:10.12096/j.2096-4528.pgt.22127

Abstract

Abstract:

Objectives The mechanism of the impact of carbon capture technology on the peaking capacity of coal-fired power plants was analyzed, and the impact on the carbon capture technology on the power generation efficiency of coal-fired power plants was quantified. Methods A typical coal-fired power plant was used as an example, and a post-combustion carbon capture scheme was selected. The simulation model of the conventional coal-fired thermal power unit and the carbon capture power plant was constructed by EBSILON software. The operation interval of the carbon capture power plant was derived. A comparative analysis of the operation of the carbon capture power plant and the conventional coal-fired power plant was conducted, and the variation in peaking performance was investigated. Results The equivalent output power of the carbon capture power plant decreased by 1%-2%, the net output power decreased by 20%-30%, and the net efficiency of the whole field decreased by 8%-10% compared with the conventional coal-fired power plant. Conclusions The addition of a carbon capture system allows the plant to gain greater downward peaking depth and faster peaking response, although it reduces efficiency.

Key words: carbon capture, utilization and storage(CCUS), coal-fired power plants, carbon capture power plants, peak shaving

CLC Number:

TK 01

Xin YUAN, Jun LIU, Heng CHEN, Peiyuan PAN, Gang XU, Xiuyan WANG. Effect of Carbon Capture Technology Application on Peak Shaving Capacity of Coal-Fired Units[J]. Power Generation Technology, 2024, 45(3): 373-381.

Figures/Tables 13

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参数	数值
主蒸汽额定流量/(kg/s)	260.4
主蒸汽压力/MPa	16.7
主蒸汽温度/℃	538
再热蒸汽流量/(kg/s)	217.7
额定给水温度/℃	272
额定背压/kPa	14.0
转速/(r/min)	3 000
额定功率/MW	300
净热耗/[kJ/(kW⋅h)]	8 182.4

参数	数值
主蒸汽额定流量/(kg/s)	260.4
主蒸汽压力/MPa	16.7
主蒸汽温度/℃	538
再热蒸汽流量/(kg/s)	217.7
额定给水温度/℃	272
额定背压/kPa	14.0
转速/(r/min)	3 000
额定功率/MW	300
净热耗/[kJ/(kW⋅h)]	8 182.4

组分	数值
N₂质量分数/%	0.639 1
O₂质量分数/%	0.032 6
Ar质量分数/%	0.010 9
H₂O质量分数/%	0.105 0
CO₂质量分数/%	0.209 4

组分	数值
N₂质量分数/%	0.639 1
O₂质量分数/%	0.032 6
Ar质量分数/%	0.010 9
H₂O质量分数/%	0.105 0
CO₂质量分数/%	0.209 4

参数	数值
捕集效率/%	90
捕集能耗/MW	50.46
水耗/(kg/s)	48.68