Carbon emission accounting method for coal-fired power units of different coal types under peak shaving conditions

Haoyu Chen, Xi Chen, Guanwen Zhou, Linghong Zheng, Ming Xu, Li Yu and Hong Zhang

Energy, 2025, vol. 320, issue C

Abstract: In the context of carbon peak and carbon neutrality, the increasing share of renewable energy in the power system has resulted in coal-fired power units operating at low loads, rendering traditional carbon emission factor models inapplicable. To achieve more suitable carbon emission accounting methods, this paper models the entire coal-fired power generation process. In this study, we first employ Computational Fluid Dynamics (CFD) to conduct numerical simulations of the boiler combustion. Then, a mathematical model is constructed to obtain the boiler thermal efficiency. Additionally, the turbine heat rate and auxiliary load rate model are derived from historical data. Finally, after verifying the accuracy of the above models, a study on the emission factor characteristics of different coal types was carried out. The results indicate that the emission factor is primarily influenced by factors including coal hydrogen/carbon content, heating value, boiler load rate, boiler thermal efficiency and carbon oxidation rate. Based on the simulation data, empirical equations were fitted to describe the relationship between carbon emission factor and load for different coal types. These equations can be used for low loads, enriching the existing emission factor system and providing a valuable reference for carbon emission accounting under peak shaving conditions.

Keywords: Coal-fired power unit; Carbon emission accounting; Emission factor model; Peak shaving (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:320:y:2025:i:c:s0360544225009569

DOI: 10.1016/j.energy.2025.135314

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